Honeywell Thermostat Not Working: How To Easily Troubleshoot

Honeywell Thermostat Not Working: Try replacing the batteries or performing a hard reset to solve the problem if your Honeywell thermostat isn’t working. If that doesn’t solve the problem, check your circuit breaker and any loose wires on the thermostat. The Honeywell Thermostat can be reset to factory defaults with a hard reset if everything else fails.

 

How can I fix a Honeywell thermostat that won’t work?

How to Fix a Malfunctioning Honeywell Thermostat

  • The thermostat’s cables must all be disconnected.
  • Take the gadget out of the wall plate.
  • Five minutes should pass once the batteries are removed.
  • Both the batteries and the cables should be replaced.
  • Wait five minutes after turning on the system.

 

Does a Honeywell thermostat have a reset button?

Set back to factory defaults

The Honeywell T5+ / T5 / T6 Pro Series Thermostats should be reset using the following procedures: Make sure the gadget is turned on (it should be on). Press and hold the menu button for five seconds. As you continue to the left, halt when you see “Reset.”

 

How To Tell if your Thermostat  is Bad

Honeywell Thermostat Not Working

Watch the Video

 

What Thermostat Model Do I Have?

Three different types of thermostats are produced by Honeywell. Small hints can be used to identify the sort of thermostat that is installed in your home if you are unclear.

Manual

A dial, similar to the one you use on a microwave to set the time, will either be in the shape of a dial or will be located on top of a manual thermostat.

These manual thermostats are only only seen in older buildings and are not very prevalent today.

Programmable

Your thermostat is probably a programmed thermostat if it has a digital display but no accompanying app. Additionally, there are a few buttons on the screen that you can use to navigate the menu.

Smart

A sizable, colorful display and a few buttons are typically seen on smart thermostats. The companion app, which can be downloaded to a tablet or smartphone, gives users access to the majority of its controls.

The thermostat ID card that comes with it has information on the model of your Honeywell thermostat on it.

If you don’t have the ID or live in a rental, you can still determine the model number by taking the thermostat off the wall plate.

The majority of Honeywell thermostats can be pulled out of the wall plate to be uninstalled. Slide it or flip it to see if it will come off. At the rear, it mentions the model number.

Keep in mind that jerks or improper handling can harm your thermostat. Therefore, if it does not come off readily, do not mess with it.

 

Common Problems with Honeywell Thermostats

A thermostat troubleshooting is not a tough task. The diagnosis of the condition is the key challenge. The most typical thermostat issues are listed below.

Your Honeywell thermostat’s display is blank. The following causes frequently result in the display going dark:

  • Worn out batteries
  • Erratic power
  • Open the furnace door
  • C-wire disconnected

If you have a programmable thermostat, you can resolve the problem by changing the batteries. On the other hand, be sure the power wire is not harmed whether you have a manual or smart thermostat. Make sure your air handler and furnace are powered on (switch cranked up) and that the doors to the air handler panels and furnace cabinet are snugly closed.

The thermostat may need to be changed if the issue persists. Unfortunately, troubleshooting cannot resolve blank display issues.

 

HVAC Unit System Not Working

Typical HVAC problems include:

  • Emits cool air when the heat is on.
  • The computer won’t answer.

As ridiculous as it may sound, check that your thermostat is set to “cool” or “hot” depending on the temperature before fretting that your HVAC system is broken. It would be ideal if you kept it turned on.

In addition, ensure sure the temperature is either set higher or lower than the room temperature when setting it.

Additionally, the HVAC system is ineffective if the furnace cabinet doors, air handler doors, or panels are left open.

The circuit breaker may need to be checked and reset if the previously mentioned fixes don’t work. Wait five minutes after the system restarts for the compressor to start.

 

Blinking “Cool On” or “Heat On”

What system is active at any given time is shown by the “Cool On” and “Heat On” indications. Both of the signs will not appear if your thermostat is off.

Don’t worry, though, if the “Cool On” or even the “Heat On” sign is blinking; your system is in a five-minute delay condition. Compressor protection timer is a built-in safety feature that provides this.

If the power abruptly goes out and comes back on, it stops the thermostat from short-circuiting.

 

How to Fix a Malfunctioning Honeywell Thermostat

You can attempt the following techniques to fix a broken Honeywell thermostat:

 

Replace fresh the Batteries

The system settings are typically reset to their initial condition when the batteries are changed, which resolves any problems brought on by software defects.

  • All of the thermostats’ wire connections should be broken. Be careful not to confuse them when reconnecting.
  • Take the gadget out of the wall plate.
  • Five minutes should pass once the batteries are removed.
  • Both the batteries and the cables should be replaced.
  • Wait five minutes after turning on the system.
  • After changing the batteries, it’s conceivable that your Honeywell thermostat will still not function.

 

Look for any power outages.

Connectivity issues are typically to blame for the majority of consumer complaints about thermostats that don’t function properly.

Either a wire is broken, or the electricity is cut off for some other reason.

So, if your Honeywell thermostat system is malfunctioning, check to see if the cabling is intact and that electricity is being supplied.

Don’t forget to inspect the furnace cabinet doors or the doors to the air handlers. A safety feature built into Honeywell systems activates if either of the openings is not properly closed.

The HVAC system is rendered inoperable when this feature is activated.

 

Fixing the “Cool On” light’s blinking

The “Cool On” light blinking typically indicates that the system is kickstarting and that the safety timer has tripped to prevent a problem with the thermostat’s compressor.

You are not need to conduct any troubleshooting in this situation. After five minutes, the safety feature is automatically disabled.

However, this is what you can do if it does not turn off automatically:

  • Set the thermostat to the lowest level that is possible. Make sure the fan is on automatic as well.
  • Make sure the thermostat timer is not in setup mode and is off.
  • Verify whether the low battery indication is on.
  • Ensure that the furnace’s apertures are all sealed.
  • Check to see if the AC filter is choked.
  • Verify the cleanliness of the AC coils.
  • Reset it either by changing the batteries as indicated above or by finding the factory reset option in the menu.
  • Only smart thermostats will support the latter.

 

Fixing the “Heat On” light’s flashing

The safety timer has been tripped to stop the compressor in the thermostat from failing if the “Heat On” light is blinking.

You are not need to conduct any troubleshooting in this situation. After five minutes, the safety feature is automatically disabled.

However, this is what you can do if it does not turn off automatically:

  • Set the thermostat to the lowest level that is possible. Make sure the fan is on automatic as well.
  • Make sure the thermostat timer is not in setup mode and is off.
  • Verify whether the low battery indication is on.
  • Ensure that the furnace’s apertures are all sealed.
  • Reset it either by changing the batteries as indicated above or by finding the factory reset option in the menu.

Only smart thermostats will support the latter.

 

Last Thoughts

There is no reason for Honeywell thermostat troubleshooting to be a mystery. Troubleshooting Honeywell thermostats is not that difficult. The thermostat may have a hardware problem or you may not be setting the temperature high enough or low enough if you have already tested the batteries, wiring, and furnace door but have not yet discovered a problem.

Use the permanent hold approach to make sure the heating and cooling settings are accurate. All you have to do is press the “Switch to Permanent Hold” button while holding down the “Up” or “Down” arrows for heating or cooling, respectively.

This will manually adjust the thermostat’s setting to match the temperature outside. You might want to seek professional assistance if neither of the aforementioned options proves successful.

 

Other FAQs regarding Honeywell Thermostat Not Working

What does the Honeywell thermostat recovery mode entail?

Recovery mode is when the thermostat tries to reach a temperature that is either higher or lower than the ambient temperature.

How can I get a Honeywell thermostat out of recovery mode?

On a Honeywell thermostat, you can disable the recovery mode by doing so in the settings. The recovery mode can also be scheduled or programmed in accordance with your preferences.

 

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