Honeywell Thermostat Not Turning On Ac – How to Troubleshoot?

When my cousin’s kids come to stay, they like playing on the Honeywell thermostat’s display even though they have no idea what it does.

I always knew that the frequent roughhousing would eventually catch up with me, and a few days ago, it did.

The AC was difficult to turn on with my thermostat (Honeywell Thermostat Not Turning On Ac). In addition to having an impact on your home’s heating and cooling system, a malfunctioning Honeywell thermostat can result in significant increases in your utility costs.

I understood I needed to find a solution right away. I eventually found a solution after looking through several web publications and videos.

Sometimes, the air conditioner won’t come on at all, even when the Honeywell thermostat is set to the proper temperature. Fixing it by resetting the thermostat is the quickest and easiest solution.

To maintain your Honeywell thermostat, you may also inspect the wiring, clean the air filter, and replace the batteries.

What Model of Thermostat Do I Have?

Checking the ID card that came with your thermostat is the quickest way to determine what kind of thermostat you have.

You may locate the product ID number without the card by taking the gadget away from the wall plate.

Almost the majority of the models are easily detachable from the wall. If you remove it and turn it over, you’ll see the model number clearly labeled on the back of the container.

The letters TH, T, RTH, RCHT, CT, TL, or RLV come before the number.

Standard Solutions for a Honeywell Thermostat Not Turning On Ac

Now that you know which Honeywell thermostat model you have, I’ll go through several tried-and-true techniques for fixing a broken air conditioner.

Reset the Thermostat to Factory Settings

Locate your specific model below and follow the instructions.

Honeywell Thermostat Not Turning On Ac

Honeywell 4000 series:

After ensuring sure the Honeywell 4000 series device is turned on, hold down the “Program” button for a few seconds.

Press the reset button for roughly one to two seconds with a paperclip or other pointed item, and then let go of the ‘Program’ button.

Honeywell 6000 series:

To reset a Honeywell 6000 series thermostat, turn the device on, then press and hold the Fan button, then the Up arrow button, for around 5 seconds.

Make the number on the screen read “39” by pressing the button in the lower left corner.

Follow it up by pressing the Down arrow button until you reach 0, and then confirm by selecting Done.

The temperature has been readjusted.

Honeywell 7000 series:

If you have a Honeywell 7000-series thermostat, you should turn off the thermostat and unplug it. Get the thermostat out of the wall plate now.

Two standard AAA alkaline batteries are included. Take them out and put them back in the other way for a count of five.

Now that the batteries are in the correct orientation, the screen should light up. After you have installed the thermostat and covered the plate, you may turn on the electricity.

 Honeywell Lyric T’s

Scroll down the menu that appears when you tap ‘Menu’ and tap ‘RESET.’ To finish the factory reset, tap “Select” and then “Yes.”

If you choose “No,” you’ll be sent back to the reset menu.

Honeywell 8000 Series

To do this, go to the ‘System’ menu on the screen and press and hold the blank button in the middle for 5 seconds.

Click the “Restore factory settings” button now. Your home’s thermostat has been reset.

For the Honeywell 9000

To modify settings, select “Menu” and then “Preferences.” Finding “Restore to factory default,” then tap “Yes.”

Regardless of the thermostat model, setting your schedules and resetting the clock will be necessary when you perform a factory reset.

Get New Batteries If You Haven’t Done So Recently (selected models only)

Honeywell Thermostat Not Turning On Ac

To change the batteries on your thermostat, (if your model uses batteries).

  • Turn off the power by switching it to the “Off” position at the breaker panel.
  • The thermostat must be removed from the wall plate.
  • Take out the worn-out batteries and replace them with fresh ones.
  • Connect the thermostat to the wall plate and flip the switch to “On.”

Inspect the Wiring and Connections for Breakdown

Inspect the Wiring and Connections for Breakdown

By removing the thermostat’s face or body, you may inspect the wiring within.

One wire is white, while the other is red. Assuming you have a thermostat, connecting these should activate it.

There is an issue with the thermostat if your heating system turns on when you connect the cables.

It’s a good idea to double-check that the thermostat isn’t turned up too high.

There might be a problem with the thermostat wiring if connecting the red and white wires did not solve the problem.

Considering how risky it is to mess with the AC mains supply, you should probably not check the integrity of your thermostat’s wiring on your own. Instead, you should seek the assistance of a trained expert by dialing their number.

Clogged Air Filters Should Be Replaced.

Should Be Replaced

If the air filter is dirty, no air will be able to flow through the vents and cool the room, which will result in broken air conditioning. Your air conditioner may spring a leak or overheat if you do this.

Air conditioners might be damaged if the filters aren’t checked and cleaned on a regular basis.

Their efficiency and longevity are both improved by this.

Air filters should be cleaned every few months or if grey or ashy buildup is observed on the duct side of the filter.

If You Have Tried Everything And Still Need Help, Call Honeywell.

Honeywell Thermostat Not Turning On Ac

If you are sure that none of the above reasons are causing the issue with your Honeywell thermostat, it is best to contact Honeywell Support.

On a hot day, it may be extremely frustrating to be stuck indoors because of a broken air conditioner.

Your air conditioner will be back up and running in no time with these tried and true methods.

Don’t worry if you can’t figure out the problem on your own; Honeywell has helped.

I’d add that, for obvious reasons, you shouldn’t mess about too much with the wiring in your home.

Frequently Asked Questions:

Can you tell me how to clear the memory on my Honeywell air conditioner’s thermostat?

Resetting your thermostat is as simple as removing the batteries or using the on-screen menu.

Depending on the model, the procedure may change. Therefore, it is recommended that you check either the user manual or the website.

Is it possible for the thermostat to prevent the air conditioner from functioning?

Yes, problems with your thermostat can cause your air conditioner to fail even if it is not broken. If it doesn’t work, you can try resetting the thermostat to see if that helps.

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Hassan Zaka

I am an expert in accounting and have diverse experience in technical writing. I have written for various industries on finance, business, and technology. I have a clear and simple writing style and use infographics and diagrams to make my writing engaging. I can benefit any organization needing technical writing services.

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