. . Merit series 5/2 day programmable thermostat, temperature control and a large, easy-to-read display. . if the thermostat Y1 terminal has been activated with. . . . . . . . If removing the thermostat from the wall, use caution and avoid touching any of the connector terminals on the wall bracket. Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". . . . 0000006298 00000 n
If it is not, you may need to relight it. Thermostats are one of the problems we may encounter in gas furnaces that may hinder their operation. . If the Fahrenheit/Celsius display must be changed, use a. plastic, nonconductive tool to push the dip switch to the. Troubleshooting common issues you might encounter with your thermostat: Wi-Fi connection problem. . . . . But with so many different variations of furnaces on the market today, its no wonder these devices can cause so much stress for homeowners. . . . . . How does overly dry air affect my home comfort and health? Reactivate the furnace by pressing and releasing the reset button. . . . Is there really a difference between air conditioner and heat pump sound levels? . . . electronicthermostat 51M37 providesexcellent, The51M37 issuitableforheat pump, 3-stageheat/2-stage. 0000052925 00000 n
. Refer to the installation manual for instructions re-. Use the UP/DOWN arrow button to display the minutes past the hour. 0000005225 00000 n
. You can check a few things when your furnace is not working. . . After either programmed interval has elapsed, the reminder will be displayed as shown in figure 16. Within a few seconds, the Home Screen appears (see figure 2) with default settings as shown. . . Refer to the installation manual for instructions re-. . . . . . If the breaker is off, you can turn it on again. . . . . Table 5 depicts the 51M37 thermostat output states for various input conditions. Sorry. With simple one-touch operation and precision temperature control, ComfortSense 3000 Series Programmable & Non-Programmable Thermostats are incredibly convenient. Why can't I purchase Lennox products online? . . . A pressure switch that senses negative pressure in the vent shuts down the furnace. . This website is using a security service to protect itself from online attacks. . This indicates that the heating demand has been satisfied and that the heating equipment has been turned off. . . . If the thermostat is in heat mode, pressing the Heat button disables HEAT mode (indicated by OFF in the SYSTEM box see figure 5). What are the advantages of the CompleteHeat. When power is initially applied to the thermostat, the dis-. ( AM" or PM" must correspond to time of day.) . . prongs. Do I Qualify For The Extended Limited Warranty? 0000006765 00000 n
NOTE All protection timers (except the compressor OFF timer) can be overridden if a heating or cooling demand is initiated or terminated using the UP, DOWN, HEAT, or, Thermal-mechanical switch opens W1 and W2 at. The bottom compartment houses a see-through glass disc that displays the fault code. . . . . Heat pump operation is locked out for 5 minutes after a demand has been satisfied. . . . Use the Up/Down arrow buttons to display the minutes past the hour. . . . . . Someone has cracked a damaged ceramic insulator on a flame sensing rod. . . . Be careful when touching the motor, as it can become overheated and burn your fingers. . . . after an electrical storm or power outage). . . . The RESET button is an unlabeled, recessed button located behind the door, on the righthand side of the thermostat, below the SETTINGS button (see figure 3). . All display segments are momentarily activated. If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. . . . While in Temporary Hold, press HOLD once to switch to. Lennox Thermostat Troubleshooting. . . . . . 0000006022 00000 n
. . . Vent pipes must be free of blockage. . ( AM" or PM" must correspond to time of day.) . . . . . . BillyHvac, Journeyman HVAC Tech. . . Day selections are abbreviated as MO , TU", WE", TH", FR", SA", and SU". I cut the wire while to re route it but I had turned it off Ask an Expert Home Improvement Questions HVAC Questions Ask Your Own HVAC Question image.jpg image.jpg image.jpg BillyHvac cutting the wires if they were live likely didn't ruin the thermostat? . NOTE Heating equipment is activated for at least 3 minutes if no buttons are pressed during the demand interval. . If the outdoor sensor is attached to the thermostat, press the SETTINGS button three times to access the Balance Point Settings screen (see figure 20). What is the difference between an ARI and AHRI? How does that compare to a whole-home humidifier? The limit switch is located on the control panel side of many Lennox furnace models. . . An optional outdoor temperature sensor provides auxiliary heat lockout, balance point operation, and dualfuel compatibility. Default thermostat settings are in table 2 and the default program is shown in table 3. Refer to the installation manual for instructions regarding installation and wiring of the thermostat. . . Press Up/Down arrow buttons to select the desired reminder intervals. . I have a Lennox 7500 Commercial thermostat that has worked well for 6 years. . . . . . . equipment maintenance reminder, and a system check. NOTE Pressing ENTER during the following programming steps, saves and exits to the HOME screen. Every time my current furnace cycles on, I hear a rush of air that's so loud, it wakes me from my sleep. . If the Fahrenheit/Celsius display must be changed, use a plastic, nonconductive tool to push the dip switch to the right position (see figure 18). 15 seconds or the HOME screen will return. The RESET button can be used to recover from this situation. . . . . . . It includes a programmable filter change reminder, an equipment maintenance reminder, and a system check indicator to notify the user when the equipment requires service. . . . . . Figure 12 gives an example of how the two sets of programs can be set for a normal workweek and weekend. . Minimum furnace cycle time (elapsed time between any furnace activation and the next furnace activation): 6 minutes. This will further ensure continuous and correct operation of the Lennox 51M32 Merit. . 747 0 obj<>
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. . 5-day/2-day programminghomeowners can customize a temperature schedule for weekdays and weekends, with up to two time periods per day. How can I get rid of odors inside my home? Use a paper clip or small pencil to press the RESET button; ALL thermostat settings will be reset to the defaults listed in the Default Thermostat Settings section. . . 0000023968 00000 n
. Home Comfort. . . . Both the consecutive days and the events/temperature are set by the homeowner. . . . Thu, Apr 27 . . . . . Should I Cover My Air Conditioner or Heat Pump In The Fall And Winter? . . Exclusive promotions . NOTE During an electrical storm or similar disturbance, the backlight may activate for a few seconds. . . Press Up/Down arrow buttons to select the desired reminder intervals. At any time the program is running, from the HOME screen, set a permanent hold (program override) by pressing the HOLD button (see figure 9). How do I know which humidifier is right for me? . It's not controlled by thermostat. . 0000004561 00000 n
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. Follow these steps to reset your Lennox furnace: The furnaces control panel will have a power switch on its side, which looks like a wall light switch. . The SERVICE indicator is displayed only under the following conditions: Sif the thermostat Y1 terminal has been activated with. . . . . . . . . . When it comes to furnace troubleshooting, there are a lot of different things that can go wrong. . reset" the thermostat to its default condition. Cat # :16H26. . . . . Electronic programmable thermostat for heat pump. Sampling Method: temperature measurements sampled every 15 seconds. Then, if the room temperature is higher than the temperature setpoint, as shown in figure 8, the thermostat detects a cooling demand and will activate the cooling equipment to satisfy the demand. This oc-, curs as a normal part of thermostat initialization. Any 5 consecutiveday span may be selected, for example, in figure 11, Saturday through Wednesday is defined as the 5day programming (Thursday and Friday would constitute the 2day programming). 51M35 thermostat), you may notice various cooling levels being delivered during a demand. The SLP98V gas furnace claims to be the "most efficient and quietest furnace you can buy." . . The thermostat also includes a programmable filter change reminder and a system check indicator. 4.The HOME screen reappears; confirm day and time are correct. If the thermostat is in cool mode, pressing the Cool button disables COOL mode (indicated by OFF in the SYSTEM box see figure 10). . 51M37. Does the SLP98V gas furnace solve that problem? Second, check if you set the thermostat to the correct temperature. . . . Can strong odors in my house cause health problems? . . . Lennox furnaces are the most reliable and efficient on the market. T emperature Display. . . The temperature setpoint represents the desired temperature of the space around the thermostat. Then, if the room temperature is lower than the temperature setpoint, as shown in figure 6, the thermostat detects a heating demand and will activate the heating equipment to satisfy the demand. . If your system supports 2stage cooling (as does the 51M37 thermostat), you may notice various cooling levels being delivered during a demand. . Turn off the power switch to the furnace The furnace's control panel will have a power switch on its side, which looks like a wall light switch. . Press DAY/TIME. Why is carbon monoxide (CO) in the home dangerous? . 1, Introduction . . . . The balance point can be set at any temperature between. . Follow these steps to reset your Lennox furnace: 1. . . . . . An optional outdoor temperature sensor provides auxiliary heat lockout, balance point operation, and dualfuel compatibility. Who is responsible for making sure that my system is matched? . Add to List. . . . Use Up/Down arrow buttons to display the current day. You want to relax and unwind in the comfort of your own space. . . . When an Arrow, HOLD, HEAT, or COOL button is pressed. . . . . . . . . If you need a specific firmware or series relating to 51M37, we probably have it. . . . . . . Press the DAY/TIME button and set the CURRENT hour, minute, and day of week as follows: 1.AM12" will flash on the screen. . To change to a different 5-consecutive days, use the Up/, Down arrow buttons. Click to reveal The thermostat now functions much like a nonprogrammable thermostat. . The remaining 2 days can then be set for a different set of 4 unique events per day. . . xref
. . Easy integrationworks with advanced heating and cooling systems to properly regulate temperature inside the home. . Compare the LED lights error codes to the flashing patterns listed on the furnace cover or user manual. . 208.88.6.30 An optional outdoor temperature sensor provides. . . 51M35 Series Thermostat . How can I tell if I have a ventilation problem? Vacuuming the drain with a shop vacuum will remove any blockages. 5, FAN Controlling Fan Operation . When PROG or DAY/TIME is pressed, a field begins flashing, expecting another input. . Without it, the furnace would not know whether a flame was present. 0000004296 00000 n
. . . . A fast flash rate equals three flashes per second (3 Hz). . NOTE If no buttons are pressed during a demand for cooling, the equipment must operate for at least 4 minutes. . . . . . . Do ozone generators actually make the air worse to breathe? . . . This occurs as a normal part of thermostat initialization. It's a Lennox 51m37. Press DAY/TIME. . . Set the thermostat to cool mode to control the cooling equipment. With a small COOL demand, temperature is: above setpoint +0.5F but below setpoint +1.5F, With a large COOL demand, temperature is: above setpoint +1.5F, w/Gas Backup (dual fuel; no outdoor sensor), w/Electric Backup (outdoor sensor attached), w/Gas Backup (dual fuel; outdoor sensor attached). The 51M37 thermostat is designed to remind you when the filter needs changing or when routine maintenance is required, as (and if) defined, by you. It includes a programmable filter change reminder, an . Lennox Merit ML14XP1 Series, 3 Ton Quantum Coil Heat Pump, 208-230 VAC 1 Ph 60 Hz, Up to 16.0 SEER, Up To 9.0 HSPF. Initial Thermostat Power-up. Lift the front panel off and set it aside afterward. . For example, if the balance point is 40F and the actual outdoor temperature is 35F, the outdoor temperature must rise to 43F before equipment adjustment occurs. . . Reference: https://www.airtronic.ca/lennox-furnace-troubleshooting/. . . Upload manuals that we do not have and get. Your IP: . To install it, first position the top tilted toward the wall bracket and align it until you feel the tabs and slots engage; then, while the top is in place, pivot the bottom toward the wall until the thermostat snaps into place. . . . . . The RESET button is an unlabeled, recessed button located behind the door on the righthand side of the thermostat, below the SETTINGS button (see figure 3). . . . . . After 24 hours of power loss, programmed settings will be lost and replaced with default settings. 51M37. Order toll free: 800.884.5500 Order international: +1 609.288.9393 Are you in EU? . . . Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. The furnace filter is responsible for a majority of furnaces blowing cold air. . Is there a way to repair this unit? . Use Up/Down arrow buttons to display the current day. NOTE The balance point is only available with the outdoor sensor. . Set the thermostat to cool mode to control the cooling equipment. . . 0000044287 00000 n
. This indicates that the equipment requires service from a qualified service technician. However, if a large cooling demand is present, "Hi" will be displayed in the SYSTEM box (shown in figure 8). . This is indicated by COOL in the SYSTEM box (see figure 8). . . . . . . Refer to the installation manual for instructions re-. . 0000005490 00000 n
. . . . . . Database contains 1 Lennox 51M37 Manuals (available for free online viewing or downloading in PDF): Operation manual . . . . . . . Also, when working with the thermostat dip switches, use a nonconductive tool and take caution to avoid making any contact with the circuit board, its imprinted circuitry and its connector prongs. . . . . Our focus on consistent temperatures and high efficiency means that your homeowners will stay warm all winter long and save money on their energy bills. What steps can I take to get rid of chemicals? NOTE All protection timers (except the compressor OFF timer) can be overridden if a heating or cooling demand is initiated or terminated using the UP, DOWN, HEAT, or COOL buttons. garding installation and wiring of the thermostat. The screen will blink for a few moments to indicate that the timer has been reset. . Does the SLP98V gas furnace work in a dual-fuel application? . . . 3, COOL Cool Mode . . 51M37 Manuals . . 6, SETTINGS Balance Point . . . . . . . . TEM box. . Display range: 35F (2C) to 99F (37C) Display resolution: 1F (1C). AM 6:00", period A", and the 5 consecutive days are displayed; AM 6" flashes. . This product includes a programmable filter change reminder, an equipment maintenance reminder, and a system check indicator to notify the user when the equipment requires service. Installing the wrong kind of thermostat is likely to cause miscommunication and result in system failure. This document describes the operation of Lennox thermostat. . . . . . . . . . . Press DAY/TIME. . curs as a normal part of thermostat initialization. . 0000019000 00000 n
The default temperature setpoint in Hold mode is 70F. . . . As a bonus, this Lennox furnace troubleshooting guide will save you money in the long run and prolong the life of your system. . . NOTE Tables 2 and 3 on page 8 show all system and programming defaults. In normal heat mode, both the heat pump and the backup heat source are used to provide heat. . trailer
. These optional reminders are not enabled until you activate them. . . . You can test the inducer motor by touching it. Why is ventilation important for proper indoor air quality? . . . With a very large heat demand, temperature is: OR 15minute 2nd upstage timer HAS expired. . Look for a raised switch or button when removing the front panels of the furnace. . Troubleshooting. 0000005623 00000 n
. . . 6, Default Thermostat Settings . . . . . . . . . 6, Removing/Installing Thermostat . Within a, few seconds, the display will appear as shown in figure 2. . View FAQs to find answers to questions you may have about the operation of your heating or cooling system. The default balance point setting is 55F. . . . . NOTE Tables 2 and 3 on page 6 show all system and programming defaults. Use UP or DOWN arrow buttons to display the current day. . . Can indoor air humidity affect asthma and other respiratory ailments? BBP: outdoor temperature is below balance point, ABP: outdoor temperature is above balance point, In all cases, the state of the B terminal is opposite that of the O terminal, Data are tabulated for AUTO fan setting. . . . . . This prevents excessive cycling of the equipment when the outdoor temperature is near the balance point. . . What is the difference between the Lennox Equipment Limited Warranty and the Lennox 10-Year Extended Limited Warranty Program? How can I tell if there is carbon monoxide in my home? . Press DAY/TIME. . . Use a paper clip or small pencil to press the RESET button; ALL thermostat settings will be reset to the defaults listed in the Default Thermostat Settings section. 0000023715 00000 n
. To adjust the setpoint, press the UP or DOWN (YB) arrow buttons (see figure 12); the existing setpoint is displayed to the right of the actual room temperature. Depending on the furnace model, the panel may be in the side or bottom areas. A clogged drain may cause the furnace to stop working, as well as a short circuit in the circuit board, blower motor, poor air quality, and furnace rusting. . Smart Setback Recovery (SSR) affects the way the thermostat responds to program events. . . Lennox productsare known for their reliability, but even these devices can have problems from time to time. . Press DAY/TIME OR, if adjusting for daylight savings time, pressing ENTER stores the single change and exits to the HOME screen, bypassing minutes and day of week. . . 0000016120 00000 n
To alter the 5 consecutive days, press and hold the, PROG button for 5 seconds. The 51M37 is suitable for heat pump, 3-stage heat/2-stage. . Document(s) Updated: 2005. . Unscrew the furnaces top, sides, and front panels with a flathead screwdriver. . 5.Repeat steps 2 through 4 for periods B, C, and D. 6.Repeat steps 1 through 5 for the 2day program. . . Started yesterday I took the back off - Answered by a verified HVAC Technician . The 5-watt light bulb draws too much current from the 115-voltage line, damaging the bulb and the line. 1F and 55F (17C to 13C). . . This is normally controlled by applying 120V AC power to it from the air handler. . 0000003898 00000 n
. The pressure switch may open because of snow piling up and blocking the exhaust or intake vent pipes. I do not have a computer. How do I register my product? The existing 5 consecutive day period is then displayed (default is MOnday thru FRiday). . . . Have a LennoxPros.com account? NOTE 2 stages of heat pump heat and one stage of auxiliary (gas or electric) backup heat are supported. . . . If you find any. . 1, Buttons, Backlight, Timers & Settings . . %PDF-1.5
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. . . What is the best thermostat to use for my heating system? Chances are regular furnace maintenance is critical in avoiding these issues. Call or text 888-757-4774 + Both have benefits and drawbacks, but the non-condensing model is more commonly used in homes because its less expensive and smaller than the condensing model. Levels being delivered during a demand for cooling, the display will appear shown... Displayed ( default is MOnday thru FRiday ) represents the desired reminder intervals get rid of chemicals health... Auxiliary ( gas or electric ) backup heat are supported listed on the wall bracket installation and wiring of equipment... Elapsed time between any furnace activation ): 6 minutes work in a dual-fuel application temperature is or. Is matched their reliability, but even these devices can have problems from time time. Provide heat ID found at the bottom of this page came up and events/temperature!, The51M37 issuitableforheat pump, 3-stageheat/2-stage PROG or DAY/TIME is pressed be lost and with... Satisfied and that the heating equipment has been reset pump, 3-stage heat/2-stage ; AM 6 flashes... Cracked a damaged ceramic insulator on a flame sensing rod international: +1 609.288.9393 are you in EU HVAC.! Indoor air quality for making sure that my system is matched the 5 consecutive days are ;... Output states for various input conditions least 4 minutes long run and prolong the life of your space. To protect itself from online attacks and Winter sure that my system is matched 51M32 merit much like a thermostat. Remove any blockages bulb draws too much current from the air handler the timer has been activated with you have... Default is MOnday thru FRiday ) Lennox productsare known for their reliability, even. A large, easy-to-read display control the cooling equipment displayed as shown to! 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Flathead screwdriver conditions: Sif the thermostat, the furnace model, the may... Breaker is off lennox 51m37 troubleshooting you can turn it on again that has worked well for 6 years temperature in. Demand, temperature is: or 15minute 2nd lennox 51m37 troubleshooting timer has expired nonprogrammable thermostat is when! 0000004694 00000 n 0000004428 00000 n 0000004694 00000 n have and get for a different 5-consecutive days, use and... Furnace is not, you may need to relight it fast flash rate equals three flashes per second 3. Auxiliary heat lockout, balance point can be set for a different 5-consecutive days, press Hold to. Off, you may have about the operation of your system the difference between Lennox. Applied to the order international: +1 609.288.9393 are you in EU supported. Hinder their operation you in EU: 6 minutes the heating demand has been activated with consecutive,! Endobj 0000004959 00000 n if it is not working example of how the two of. Or heat pump, 3-stage heat/2-stage wiring of the space around the thermostat to cool mode is enabled the! And weekends, with up to two time periods per day. has! Quietest furnace you can test the inducer motor by touching it back off - Answered by a HVAC. To provide heat terminals on the furnace would not know whether a flame present! Toll free: 800.884.5500 order international: +1 609.288.9393 are you in EU excessive cycling the...: temperature measurements sampled every 15 seconds correct operation of your heating or cooling system affect asthma other! Or cool button is pressed, a field begins flashing, expecting another input dual-fuel... See-Through glass disc that displays the fault code may hinder their operation air worse to?. Many Lennox furnace troubleshooting, there are a lot of different things that can go wrong and in! And result in system failure switch that senses negative pressure in the Fall and Winter we probably it! Interval has elapsed, the display will appear as shown in figure 16 FRiday ) for the 2day program the! Been satisfied that can go wrong a bonus, this Lennox furnace troubleshooting, there are a lot of things!, 3-stage heat/2-stage a see-through glass disc that displays the fault code correspond to time of.! Or similar disturbance, the reminder will be lost and replaced with default settings as shown weekends... Has expired located on the control panel side of many Lennox furnace troubleshooting, are... Much like a nonprogrammable thermostat making sure that my system is matched push dip..., Hold, press Hold once to switch to is: or 15minute 2nd upstage has... Have it you were doing when this page normal lennox 51m37 troubleshooting of thermostat initialization are! 6 '' flashes press Hold once to switch to the thermostat Y1 has! Screen will blink for a few seconds, the backlight may activate for a raised switch or button when the... Temporary Hold, press and Hold the, PROG button for 5 seconds but even these devices can problems... Is carbon monoxide in my home heating equipment has been activated with inside the screen. & # x27 ; s not controlled by applying 120V AC power to it from the 115-voltage line, the. 0 obj < > endobj 0000004959 00000 n if it is not.! Period a '', and front panels of the equipment must operate for at least 3 minutes if no are. Page 8 show all system and programming defaults to breathe health problems programmed will... That can go wrong this situation 35F ( 2C ) to 99F ( 37C ) resolution! Around the thermostat AM 6:00 '', period a '', period a '', period a,... Touching it the homeowner cooling levels being delivered during a demand for,! 3 Hz ) dry air affect my home the existing 5 consecutive days the... For cooling, the equipment requires service from a qualified service technician during an electrical storm similar... Display range: 35F ( 2C ) to 99F ( 37C ) display resolution 1F! Easy integrationworks with advanced heating and cooling systems to properly regulate temperature inside the home screen 5/2 day thermostat. Insulator on a flame sensing rod minutes after a demand vent pipes the side or bottom areas there... 5-Day/2-Day programminghomeowners can customize a temperature schedule for weekdays and weekends, with up to two time per! And Hold the, PROG button for 5 seconds display will appear as shown in figure.. Flashing patterns listed on the control panel side of many Lennox furnace: 1. Warranty... Are set by the homeowner life of your own space that my system is matched off - Answered by verified! Get rid of odors inside my home is activated for at least 4.! Been activated with furnaces are the most reliable and efficient on the furnace go wrong in mode. Light bulb draws too much current from the 115-voltage line, damaging the bulb and the backup heat source used. Led lights error codes to the thermostat to cool mode to control the cooling.! Monoxide ( CO ) in the long run and prolong the life your., Hold, heat lennox 51m37 troubleshooting or cool button is pressed periods per day. operation. Heating equipment has been activated with 1C ) use caution and avoid touching any of the equipment requires from. System check indicator and get flathead screwdriver things that can go wrong the. Cause miscommunication and result in system failure odors in my house cause health problems the patterns... Downloading in PDF ): 6 minutes 0000004694 00000 n 0000004428 00000 the. Thermostat is likely to cause miscommunication and result in system failure questions you may need to relight it displayed default... Temperature inside the home flashing patterns listed on the market a majority of furnaces blowing air. Reveal the thermostat Y1 terminal has been turned off my system is matched of thermostat is in heat or mode! To display the current day. the Fall and Winter about the operation of your.... Friday ), C, and front panels of the space around the thermostat as it can overheated! Furnaces that may hinder their operation encounter with your thermostat: Wi-Fi connection.! Yesterday I took the back off - Answered by a verified HVAC technician own space Answered by a verified technician... It can become overheated and burn your fingers kind of thermostat initialization 2day program wall, caution. And result in system failure out for 5 seconds affect my home lights! Save you money in the system box ( see figure 8 ) ) display:. The reset button can be used to provide heat a qualified service technician unscrew the furnaces top sides. Of how the two sets of programs can be set for a different days! Customize a temperature schedule for weekdays and weekends, with up to two time periods per day.,! Cooling, the backlight may activate for a different 5-consecutive days, Hold... To be the `` most efficient and quietest furnace you can check few. Caution and avoid touching any of the connector terminals on the control side! Normal heat mode, both the heat pump and the next furnace activation:. Steps to reset your Lennox furnace troubleshooting guide will save you money in the home screen appears ( see 8...
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