How to Troubleshoot Honeywell Thermostat Errors

Honeywell is one of the best thermostat producers, and we proudly install them on a frequent basis in Winnipeg. They’re durable and reliable. Also, Honeywell is regularly improving its technology, offering more features for your family.

Nevertheless, each thermostat can have issues every so often. Due to this, we’ve put together this useful guide to walk you through troubleshooting. While Honeywell thermostat troubleshooting problems are rare, they happen.

While you can often repair most thermostat problems on your own, they sometimes need Expert support. Our home comfort pros are ready to support you when you need us. We’re only a call away at 204-800-0613.

Let’s get started with the process by determining what kind of thermostat your house has.

What Kind of Thermostat Do I Have?

There are three models of thermostats:

Manual—This is the older dial-shaped thermostat. You won’t experience error codes with this kind, but it’s also the least efficient for saving on energy expenses.
Programmable—This thermostat includes a digital screen and arrows you press to determine your desired temperature. You can also use daily programs to decrease the temperature when you’re at work and increase it when you come home.
Smart—You won’t have to make any programs on this thermostat, since it learns your schedule. It automatically raises and lowers the temperature when you or loved ones are gone to help you save on energy expenses. You can also adjust the temperature anywhere on your phone or other Wi-Fi-enabled device.

As is the case with the majority of technologically advanced solutions, there are regular malfunctions that can take place. The majority of of these situations don’t require pro help and are easy to fix alone.

Common Honeywell Thermostat Troubleshooting Issues

All Honeywell thermostats have an exclusive kind of codes assigned to the malfunctions that happen.

Think how uncomplicated it can be to fix a computer by restarting it. Many times, troubleshooting a thermostat can be just as easy.

Here is a guide to the most common Honeywell thermostat problems. These are applicable to the following programmable thermostats:

Display is Blank

If the screen is blank on your programmable thermostat, you may need to install new batteries. If that doesn’t take care of the malfunction or you rely on a smart thermostat, there might be a wiring malfunction.

Next, you should check the power is enabled for your furnace or air handler. Confirm the switch near the indoor unit is switched “on”.

In addition to that, you should make certain all furnace cabinet or air handler doors/panels are sturdily in place.

An unsecured panel may activate the safety switch, which cuts off power to the equipment.

While it’s less common, an empty screen might indicate you need to replace your thermostat.

HVAC System Won’t Run

Make sure that your thermostat is on “cool” or “heat,” not “off.”

In the summer, make sure you put the thermostat lower than the current temperature. When it’s cold, make sure it’s higher. This sounds absurd, but we’ve seen it occur lots of times.

Ensure the power switch by your indoor unit is in the “on” position. You should also comfirm the cabinet doors or panels are closed on your furnace cabinet or air handler. An unsecured panel can activate the safety switch, cutting off electricity to the equipment.

System still won’t turn on? Verify circuit breakers haven’t flipped and that your HVAC unit isn’t displaying error codes.

“Cool On” or “Heat On” is Blinking

To begin, verify your thermostat is on “cool” or “heat.”

Then, make sure it’s signaling the correct system to start. This is usually shown by “cool on,” “heat on” or an illustration.

If this set of words or the illustration is pulsing, your thermostat is in a five-minute delay mode. This mode protects your system from damaging short cycling. This may happen if you lose power.

Honeywell Thermostat-Specific Error Codes

Honeywell Lyric™ T5 Wi-Fi (RCHT8612WF/RCHT9510WFW)

164—Heat pump needs service. Call Winnipeg Supply Service Experts at 204-800-0613 for help.
168—Wi-Fi radio error. Contact Lyric technical support at 800-633-3991. 170—Internal memory error. Reach Lyric technical support at 800-633-3991.
171—Set date and time. Finalize these settings so scheduling can occur.
173—Thermostat temperature sensor error. Call Lyric technical support at 800-633-3991.
175—AC power restarted. No action necessary.
181/182—Install a new air filter. Clear the thermostat by touching “dismiss” after putting in a new filter.
184—Install a new humidifier pad. Clear the display by tapping “dismiss” after putting in a clean pad filter.
185—Install a new dehumidifier filter. Clear the screen by touching “dismiss” after putting in a clean filter.
187—Clean or put in a new ventilator filter. Clear the monitor by tapping “dismiss” after installing a new filter.
188/189—Replace UV bulb. Call Winnipeg Supply Service Experts at 204-800-0613 for assistance.
210—Register online for outdoor temperature. Use the Lyric app to complete this step and ensure proper thermostat operation.
388—Register online for remote access and outside temperature. Get the Lyric app to do this step and ensure correct thermostat operation.
399—No Internet. Confirm your network settings.
400—No Wi-Fi signal. Wait for the thermostat to reconnect or select new Wi-Fi network.
508—Wi-Fi not set up. Use the Lyric app and follow the process to link your thermostat.

For more specifics, look at this thermostat’s user manual.

Honeywell T6 Pro Smart Programmable Thermostat (TH411OU2005)

164—Heat pump requires service. Reach Winnipeg Supply Service Experts at 204-800-0613 for assistance.
168—Wi-Fi radio error. Reach Winnipeg Supply Service Experts at 204-800-0613 for assistance.
170—Internal memory error. Reach Winnipeg Supply Service Experts at 204-800-0613 for help.
171—Set date and time. Finalize these settings so scheduling can work.
173—Thermostat temperature sensor error. Contact Winnipeg Supply Service Experts at 204-800-0613 for assistance.
175—AC power reconnected. No action required.
177—Indoor temperature sensor error. Call Winnipeg Supply Service Experts at 204-800-0613 for help.
178—Outdoor temperature sensor error. Call Winnipeg Supply Service Experts at 204-800-0613 for assistance.
181/182—Get a new air filter. Clear the display by hitting “dismiss” after adding a new filter.
183—Clean humidifier tank and replace water filter. Clear the thermostat by tapping “dismiss” after doing these tasks.
184—Get a new humidifier pad. Clear the monitor by tapping “dismiss” after getting a new pad filter.
185—Get a new dehumidifier filter. Clear the thermostat by touching “dismiss” after installing a new filter.
186—Wash ventilator core. Clear the thermostat by hitting “dismiss” after completing this task.
187—Rinse or get a new ventilator filter. Clear the display by hitting “dismiss” after getting a new filter.
188/189—Get a new UV bulb. Reach Winnipeg Supply Service Experts at 204-800-0613 for help.
210—Register online for exterior temperature. Use the Lyric app to complete this step and ensure correct thermostat operation.
388—Register online for remote access and outdoor temperature. Use the Lyric app to finish this step and ensure accurate thermostat operation.
399—No Internet. Confirm your network settings.
400—No Wi-Fi signal. Wait for the thermostat to reconnect or choose new Wi-Fi network.
508—Wi-Fi not configured. Download the Lyric app and follow the procedures to connect your thermostat.

For more details, check this thermostat’s user manual.

Our Experts are Available to Provide Assistance

If you’re still having troubles after working through the troubleshooting steps, our professionals are here to help. Reach us at 204-800-0613 and we’ll arrive rapidly to figure out the issue.

If you use a dated thermostat, right now is a fantastic time to consider a new thermostat. Thermostat technology has gotten better lately Ask us for more details on how smart thermostats can make your residence more convenient while helping save on energy expenses all year.

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