Check for 24 vac at Y1 terminal. Check sensor for damage. Press the 'Right' button to reset the selected setting. OPERATING THE THERMOSTAT Clean filter feature Repeat steps 3 and 4 to review entire 7 day Your thermostat reminds you when it’s schedule. To troubleshoot this, first, switch the thermostat to “OFF”, then take the batteries out and press the reset button again. If problem still persists, replace furnace control board. This reminds the owner to replace the filter. Check with your dealer if you are unsure. Select COOL mode. If the thermostat runs directly from the mains supply, check on the circuit breakers. Press the 'Left' button to return to the normal display. Reset the Service Filter feature to reset the blower operation timer to 0 hours. It is probable that one of them may have tripped and cut off power to your Carrier thermostat. Checking current programmed time and temperature settings Press the Reset Filter button to clear display and reset timer to 0. Check the thermostat and make sure it set in the "heat" position. Press the 'Scroll' button to select the accessory you want to reset. Set the temperature on the thermostat above the indoor temperature. How to Reset a Thermostat. 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. Put the batteries back in, switch the mode to either the “HEAT” or “COOL” position, and turn the thermostat back on. How to reset the check filter display on debonaire 220 - Answered by a verified HVAC Technician. The precise directions for resetting a thermostat will vary somewhat by model. Cooling Will Not Energize. 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. The "Accessory status" screen will appear. This new furnace control board will allow unit to run in high fire when necessary. 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. Check the wiring. "Clean Filter" on temperature display: After the selected number of hours of blower operation "clean filter" will display on LCD. Press "reset filter button to clear display and reset timer to 0. This is to remind the homeowner to check the filter. Double check wiring and check for 24 vac between R and C. E2 will clear 15 seconds after proper voltage is restored. Make sure replacement board has a date code of 9506 or later. ... press the filter button on the thermostat, then push the up or down button to change. You have excessive restriction in air delivery system. If recycling power does not clear display, thermostat should be replaced. Press the "Left" button and hold. The 'Accessory status' screen will appear. 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