If problem still persists, replace furnace control board. Make sure replacement board has a date code of 9506 or later. Press "reset filter button to clear display and reset timer to 0. You have tried pressing the reset button, and yet the thermostat refuses to turn on. Check for 24 vac at Y1 terminal. The precise directions for resetting a thermostat will vary somewhat by model. Check with your dealer if you are unsure. Select COOL mode. The first possibility to look into when you find a blank thermostat screen is to check if the unit needs to have its batteries changed. Reset the breakers and see if this restores power to the thermostat. Press the 'Scroll' button to select the accessory you want to reset. This is to remind the homeowner to "check" filter. Press the "Left" button and hold. This reminds the owner to replace the filter. Check filter(s) and ductwork. "Clean Filter" on temperature display: After the selected number of hours of blower operation "clean filter" will display on LCD. If recycling power does not clear display, thermostat should be replaced. Luckily, there are tons of online and video resources offering tutorials on how to reset a thermostat from manufacturers, HVAC professionals, and even handy homeowners. Reset the Service Filter feature to reset the blower operation timer to 0 hours. Cooling Will Not Energize. How to Reset a Carrier Thermostat. Check the wiring. Checking current programmed time and temperature settings This new furnace control board will allow unit to run in high fire when necessary. Press the Reset Filter button to clear display and reset timer to 0. If the thermostat runs directly from the mains supply, check on the circuit breakers. To troubleshoot this, first, switch the thermostat to “OFF”, then take the batteries out and press the reset button again. of a new Carrier thermostat.Your new thermostat combines computer-like ... RESET FILTER Button restarts the timer that determines the next air filter change or cleaning. You have excessive restriction in air delivery system. time to change or clean your filter by CAUTION: Pressing any other buttons while reviewing displaying the CLEAN FILTER … This is to remind the homeowner to check the filter. Press the 'Right' button to reset the selected setting. How to Reset a Thermostat. Put the batteries back in, switch the mode to either the “HEAT” or “COOL” position, and turn the thermostat back on. Check sensor for damage. It is probable that one of them may have tripped and cut off power to your Carrier thermostat. The 'Accessory status' screen will appear. OPERATING THE THERMOSTAT Clean filter feature Repeat steps 3 and 4 to review entire 7 day Your thermostat reminds you when it’s schedule. Press the 'Left' button to return to the normal display. Double check wiring and check for 24 vac between R and C. E2 will clear 15 seconds after proper voltage is restored. See descrip- Set the temperature on the thermostat above the indoor temperature. How to reset the check filter display on debonaire 220 - Answered by a verified HVAC Technician. If recessing power does not clear display, thermostat should be replaced. Setting the temperature at … Check the thermostat and make sure it set in the "heat" position. ... press the filter button on the thermostat, then push the up or down button to change. How to Reset a Carrier Thermostat Press the 'Left' button and hold. ... show me a schmetic drawing on how to wire a Carrier Debonair 450 thermostat to a 7 and half ton Carrier A/C unit 2 stage cooling and heating (Gas Heat) . 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