Honeywell is one of the best thermostat manufacturers, and we proudly install them on a regular basis in Philadelphia. They’re durable and reliable. Also, Honeywell is constantly advancing its technology, resulting in more features for your household.
Nevertheless, each thermostat can experience issues occasionally. Due to this, we’ve compiled this useful manual to go over troubleshooting. While Honeywell thermostat troubleshooting problems are rare, they do pop up.
While you can often repair most thermostat problems on your own, they sometimes call for Expert assistance. Our HVAC Experts are available to help when you need us. We’re just a call away at 215-278-9690.
Let’s get started with the process by figuring out what model of thermostat your home has.
What Kind of Thermostat Do I Have?
There are three types of thermostats:
- Manual—This is the typical dial-shaped thermostat. You won’t run into error codes with this kind, but it’s also the least efficient for saving on heating and cooling expenses.
- Programmable—This thermostat has a digital screen and arrows you touch to choose your desired temperature. You can also set daily programs to decrease the temperature when you’re gone and set it higher when you come home.
- Smart—You won’t have to set any programs on this thermostat, since it picks up on your schedule. It intuitively changes the temperature when you or other household members are gone to help you save on utility costs. You can also adjust the temperature anywhere on your phone or other Wi-Fi-enabled device.
As is the case with most technologically advanced products, there are several problems that can occur. The majority of of these situations don’t require Expert support and are uncomplicated enough to fix by yourself.
Common Honeywell Thermostat Troubleshooting Problems
All Honeywell thermostats have an exclusive set of codes assigned to the problems that take place.
Think how simple it can be to restore a computer by restarting it. Many times, troubleshooting a thermostat can be just as easy.
Here are some of the most encountered Honeywell thermostat problems. These involve the following programmable thermostats:
Display is Blank
If the display is empty on your programmable thermostat, you could need to get new batteries. If that doesn’t solve the malfunction or you rely on a smart thermostat, there may be a wiring problem.
Next, you should check the power is on for your furnace or air handler. Confirm the switch by the indoor system is in the “on” position.
Additionally, you should make certain all furnace cabinet or air handler doors/panels are sturdily secured.
A loose panel may trigger the safety switch, which disconnects power to the equipment.
Less frequently, a blank monitor could mean you should install a new thermostat.
HVAC Equipment Won’t Turn On
Check that your thermostat is on “cool” or “heat,” not “off.”
In the summer, verify you schedule the thermostat beneath the ambient temperature. When it’s cool, confirm it’s higher. This sounds absurd, but we’ve seen it happen lots of times.
Confirm the power switch by your indoor equipment is in the “on” position. You should also check the cabinet doors or panels are secure on your furnace cabinet or air handler. An unsecured panel can activate the safety switch, cutting off power to the equipment.
System still won’t start? Verify circuit breakers haven’t turned off and that your HVAC system isn’t showing error codes.
“Cool On” or “Heat On” is Flickering
First, make sure your thermostat is set to “cool” or “heat.”
Then, ensure it’s telling the correct system to start. This is typically demonstrated by “cool on,” “heat on” or a picture.
If this phrase or the picture is blinking, your thermostat is in a five-minute delay mode. This setting protects your unit from damaging short cycling. This could take place if your power is interrupted.
Honeywell Thermostat-Specific Error Codes
Honeywell Lyric™ T5 Wi-Fi (RCHT8612WF/RCHT9510WFW)
- 164—Heat pump requires service. Call Stallion Heating Plumbing Air Conditioning at 215-278-9690 for help.
- 168—Wi-Fi radio error. Call Lyric technical support at 800-633-3991. 170—Internal memory error. Call Lyric technical support at 800-633-3991.
- 171—Set date and time. Finish these settings so scheduling can run.
- 173—Thermostat temperature sensor error. Contact Lyric technical support at 800-633-3991.
- 175—AC power resumed. No action needed.
- 181/182—Replace air filter. Clear the display by hitting “dismiss” after installing a clean filter.
- 184—Replace humidifier pad. Clear the monitor by touching “dismiss” after installing a new pad filter.
- 185—Install a new dehumidifier filter. Clear the display by touching “dismiss” after putting in a clean filter.
- 187—Clean or replace ventilator filter. Clear the thermostat by hitting “dismiss” after installing a new filter.
- 188/189—Install a new UV bulb. Contact Stallion Heating Plumbing Air Conditioning at 215-278-9690 for help.
- 210—Register online for outdoor temperature. Download the Lyric app to finish this step and ensure accurate thermostat operation.
- 388—Register online for remote access and exterior temperature. Use the Lyric app to finish this step and ensure accurate thermostat operation.
- 399—No Internet. Check your network settings.
- 400—No Wi-Fi signal. Wait for the thermostat to reconnect or pick new Wi-Fi network.
- 508—Wi-Fi not set up. Use the Lyric app and follow the procedure to configure your thermostat.
For more specifics, view this thermostat’s user manual.
Honeywell T6 Pro Smart Programmable Thermostat (TH411OU2005)
- 164—Heat pump needs service. Call Stallion Heating Plumbing Air Conditioning at 215-278-9690 for assistance.
- 168—Wi-Fi radio error. Contact Stallion Heating Plumbing Air Conditioning at 215-278-9690 for assistance.
- 170—Internal memory error. Reach Stallion Heating Plumbing Air Conditioning at 215-278-9690 for support.
- 171—Set date and time. Finish these settings so scheduling can run.
- 173—Thermostat temperature sensor error. Contact Stallion Heating Plumbing Air Conditioning at 215-278-9690 for support.
- 175—AC power reconnected. No action necessary.
- 177—Indoor temperature sensor error. Contact Stallion Heating Plumbing Air Conditioning at 215-278-9690 for help.
- 178—Outdoor temperature sensor error. Call Stallion Heating Plumbing Air Conditioning at 215-278-9690 for support.
- 181/182—Replace air filter. Clear the display by hitting “dismiss” after installing a fresh filter.
- 183—Clean humidifier tank and add a new water filter. Clear the thermostat by touching “dismiss” after doing these procedures.
- 184—Install a new humidifier pad. Clear the display by hitting “dismiss” after adding a new pad filter.
- 185—Get a new dehumidifier filter. Clear the screen by touching “dismiss” after installing a fresh filter.
- 186—Wash ventilator core. Clear the thermostat by tapping “dismiss” after completing this task.
- 187—Clean or install a new ventilator filter. Clear the monitor by touching “dismiss” after getting a new filter.
- 188/189—Install a new UV bulb. Reach Stallion Heating Plumbing Air Conditioning at 215-278-9690 for assistance.
- 210—Register online for outdoor temperature. Get the Lyric app to finish this step and ensure proper thermostat operation.
- 388—Register online for remote access and exterior temperature. Use the Lyric app to do this step and ensure correct thermostat operation.
- 399—No Internet. Verify your network settings.
- 400—No Wi-Fi signal. Wait for the thermostat to reconnect or choose new Wi-Fi network.
- 508—Wi-Fi not set up. Use the Lyric app and follow the procedures to connect your thermostat.
For more specifics, check this thermostat’s user manual.
Our Experts are Here to Provide Assistance
If you’re still having troubles after trying the troubleshooting process, our Experts are available to support you. Give us a call at 215-278-9690 and we’ll be out as fast as we can to figure out the issue.
If you use a dated thermostat, now is a good time to think over a new device. Thermostat technology has gotten better lately Ask us for more details on how smart thermostats can make your home comfier while helping save on heating and cooling costs throughout the year.