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If you own a Honeywell thermostat, the blank screen could be an indication of a furnace door that wasn’t completely closed. These thermostats are programmed to shut off entirely if a furnace door is open. To rule this out, double-check to make sure your furnace door is fully closed.
Why did my thermostat screen go blank?
This is commonly due to restricted airflow because of broken or dirty parts in the HVAC system. A failing fan motor can cause your electrical components to pull in more amperage than usual, tripping the high-limit switch. Any of these could cause a blank thermostat screen.
How do you reset a Honeywell thermostat when the screen is blank?
Reset Your Honeywell Thermostat Turn off your Honeywell Thermostat switch. Open the battery slot by pressing the door down and sliding it out. Once you have opened the battery slot, slide the batteries out. Re-insert the batteries, but put them in a reversed position.
Why did my thermostat suddenly stop working?
Try replacing the batteries, then check for a blown fuse or tripped breaker in the electrical panel. If the thermostat is still unresponsive, make sure the breaker is shut off and remove the cover. If the wiring looks corroded, consider replacing the thermostat.
Where are the batteries on a Honeywell thermostat?
The battery compartment on a Honeywell thermostat is located on the side of the device. To remove it, first push the tab on the top of the thermostat. Then pull it to remove the compartment — it should slide right out.
What causes thermostat to lose power?
The power is out or a circuit breaker has tripped The power loss could also be the result of a tripped circuit breaker that powers the air conditioner or heater. Many thermostats run on low voltage sent from the transformer on the HVAC system; if the transformer loses power, so will the thermostat.
Does Honeywell thermostat have a reset button?
The Honeywell T5, T5+, and T6 series models have quick access reset mode without a button. If you press and hold the MENU button, a reset option will appear. Select the RESET option and confirm with the OK button. Your Honeywell T5, T5+, or T6 thermostat is now reset.
Does Honeywell thermostat need batteries?
Not all Honeywell thermostats run on batteries. However, if your model has an LED display, chances are it does! Just like any device that runs on batteries, you need to have these batteries changed from time to time. With most Honeywell thermostat models, you need to change the batteries only once a year.
How do I fix an unresponsive Honeywell thermostat?
How to unfreeze Honeywell thermostat (Step-by-step) Step 1: Remove your thermostat from wall. Step 2: Pull the batteries out. Step 3: Pull the cover out. Step 4: Remove both the circuit board and screen. Step 5: Disconnect the circuit board. Step 6: Restore the connection.
How long do Honeywell thermostats last?
The average lifespan of a thermostat is at least 10 years. Dust and aging wiring can cause the thermostats to malfunction after a decade.
How do I get my Honeywell thermostat to work?
A few tips and tricks you may want to try to get your Honeywell thermostat to turn on include: Replace the Batteries. You should start with the easy and obvious solution first. Check the Air Filter. Check the Circuit Breaker. Check the Wiring for Any Loose Connections. Reset Your Thermostat To Factory Settings.
How do I restore the power to my thermostat?
Just flip each switch at your circuit breaker to “off” to start the reset, then after about a minute, flip them back to the “on” position. Your HVAC system and thermostat should still be set to “off” at this point. Wait for about 30 minutes for your unit to reset, then turn it on with the thermostat.
How do I know if my thermostat needs a battery?
Check the screen: Check the screen of the thermostat and make sure that it is lighted. A blank or unlighted screen could indicate a thermostat failure. Check the batteries: Many modern thermostats rely on battery power to operate. If the screen is blank or unlighted, a battery change could solve the problem.
What happens when thermostat battery dies?
When your thermostat batteries die, you will see a black screen, the thermostat will stop working, and the heating or cooling units will not work. If, after the change of batteries, the thermostat and the heating and cooling systems start working, then everything should be back to working as normal.
How do you reset the battery on a Honeywell thermostat?
Here’s how: Power off the thermostat and remove the batteries. Put the batteries in the wrong way, with negative to positive and positive to negative. Wait ten seconds and put them back in the correct way. Your thermostat will be reset to factory settings. Be sure to reprogram your thermostat to your normal schedule.
How do I reset my Honeywell thermostat without battery?
To manually reset a thermostat, first turn off your thermostat using the power control switch. Then, turn off the breaker on your electrical panel. Wait about a minute, and then turn both back on. This should give the system time to reset.
Will low batteries affect thermostat?
When low batteries eventually die, you’ll see a black display screen, the thermostat will stop working and your heating or cooling units won’t function. The heating and cooling system cannot respond to nonexistent temperature commands.
