Honeywell Thermostat Heat on Blinking

Honeywell is a well-known thermostat maker. They’re trustworthy and durable. Furthermore, Honeywell’s technology is always evolving, resulting in new functionality for your home. But sometimes a thermostat can experience some issues such as heat on blinking. Here we try to troubleshoot this problem and why this heat on blinking happened will be discussed in detail.

So Why Honeywell Thermostat Heat on Blinking?

At Normal Situation:

“Cool On” or “Heat On” is Blinking

It is in time delay if it is blinking. normally five minutes. The heat will then be turned on as it becomes solid. By flashing and safeguarding equipment from short cycles, it is indicating that you are requesting for heat.

At Abnormal Situation when the Honeywell Heat on Flashing doesn’t stop:

It could be that the control board is blinking heat on while requesting heat, causing the inducer motor to switch on while the pressure is being checked by the control board. The heat light may be flashing because the thermostat indicates that heat is required but the furnace’s pressure switches are locked in the incorrect position, preventing the furnace from turning on.

Check to see whether the thermostat is set to heat and if the “Heat On” button is flashing. A safety timer has been tripped to safeguard the compressor in your thermostat. Your thermostat should be able to keep its heat setting once this stops flashing.

Sometime when you set the heat on it blinks and then stop but the heating is not on, in that case there are other reasons against that issue and have to be dealt separately. 

What are the other Reasons for Honeywell Heat on Blinking?

• Power outage
• Switching from cooling to heating
• Battery replacement
• Low battery

Power outage

A power loss is one of the most prevalent reasons of Honeywell thermostat blinking heat on. When there is no electricity, your Honeywell thermostat may begin to flash after the compressor runs when the power is restored. The pressure on the compressor creates flashing during the restarting operation.

Switching from cooling to heating

The compressor may be put under stress while switching from cooling to heating. Your Honeywell thermostat will flicker as a consequence. When you move from heating to cooling, the same thing happens.

Battery replacement

When you replace your batteries, the Cool On display will flash for a time. If your thermostat flashing heat on problem persists, contact a professional technician to fix the thermostat in case there is a more serious problem.

Low battery

When your thermostat’s battery is low, it may begin to flicker. However, this is more common with earlier models. A distinct indication for a low battery is available on some of the most recent Honeywell thermostats.

If Your Thermostat Keeps Blinking After A While, Here Is What You Need To Do.

You have to reset your Honeywell Thermostat to fix heat on blinking:

• Turn your thermostat off.
• Wait for 15-20 seconds and turn it back on.
• It could take up to 10 minutes because your system will automatically restart.

If the outdoor unit has not started running again, you will need to call a professional technician to diagnose the problem.

Note: Most of the time resetting the thermostat fix the problem of thermostat blinking heat on, it applies to all Honeywell thermostat model inlcuding the Honeywell pro-series thermostats. 

More:

Honeywell Pro Series Thermostat Troubleshooting

Honeywell Home Security Systems Do It Yourself

Honeywell Error Codes

T5 Wi-Fi

• 164—Heat pump needs service. Call TML Service Experts at 208-488-4892 for assistance.
• 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. Finalize these settings so scheduling can occur.
• 173—Thermostat temperature sensor error. Contact Lyric technical support at 800-633-3991.
• 175—AC power restarted. No action needed.
• 181/182—Replace air filter. Clear the screen by touching “dismiss” after adding a new filter.
• 184—Put in a new humidifier pad. Clear the monitor by hitting “dismiss” after adding a fresh pad filter.
• 185—Put in a new dehumidifier filter. Clear the thermostat by hitting “dismiss” after adding a clean filter.
• 187—Wash or install a new ventilator filter. Clear the thermostat by hitting “dismiss” after putting in a fresh filter.
• 188/189—Get a new UV bulb. Call TML Service Experts at 208-488-4892 for help.
• 210—Register online for outside temperature. Download the Lyric app to do this step and ensure correct thermostat operation.
• 388—Register online for remote access and outside temperature. Use the Lyric app to do 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 pick new Wi-Fi network.
• 508—Wi-Fi not set. Use the Lyric app and follow the process to link your thermostat.

For more information, view this thermostat’s user manual.

 T6 Pro Smart Programmable Thermostat 

• 164—Heat pump requires service. Contact TML Service Experts at 208-488-4892 for help.
• 168—Wi-Fi radio error. Call TML Service Experts at 208-488-4892 for support.
• 170—Internal memory error. Contact TML Service Experts at 208-488-4892 for assistance.
• 171—Set date and time. Finalize these settings so scheduling can work.
• 173—Thermostat temperature sensor error. Reach TML Service Experts at 208-488-4892 for help.
• 175—AC power reconnected. No action required.
• 177—Indoor temperature sensor error. Reach TML Service Experts at 208-488-4892 for support.
• 178—Outdoor temperature sensor error. Call TML Service Experts at 208-488-4892 for support.
• 181/182—Replace air filter. Clear the display by tapping “dismiss” after installing a clean filter.
• 183—Clean humidifier tank and add a new water filter. Clear the thermostat by touching “dismiss” after doing these tasks.
• 184—Install a new humidifier pad. Clear the thermostat by touching “dismiss” after installing pad filter.
• 185—Get a new dehumidifier filter. Clear the thermostat by tapping “dismiss” after adding a new filter.
• 186—Clean ventilator core. Clear the monitor by hitting “dismiss” after doing this task.
• 187—Rinse or get a new ventilator filter. Clear the display by tapping “dismiss” after buying a new filter.
• 188/189—Get a new UV bulb. Get in touch with TML Service Experts at 208-488-4892 for support.
• 210—Register online for exterior temperature. Download the Lyric app to complete this step and ensure accurate thermostat operation.
• 388—Register online for remote access and outside temperature. Get the Lyric app to do this step and ensure proper thermostat operation.
• 399—No Internet. Check your network settings.
• 400—No Wi-Fi signal. Wait for the thermostat to reconnect or select new Wi-Fi network.
• 508—Wi-Fi not configured. Download the Lyric app and follow the process to connect your thermostat.

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

Frequently Asked Questions:

Why is my Thermostat flashing heat on but no heat?

Honeywell thermostat no heat option

1. At the bottom of the screen, select the menu (three small horizontal lines)
2. Go down the page and select “Advanced Setup.”
3. By choosing “Modify Configuration,“
4. When you get to “Equipment Type,” click through the steps until you find the appropriate heating option for your system (Conventional Forced Air Heat in my case)
5. To return to the main menu, choose the efficiency or subtype that corresponds to your system and click “Done.”
   That ought to do it. The Hot and Auto choices must now be accessible after clicking Mode.

How long does it take for Honeywell thermostat to heat up?

Call for heat by setting the mode to “Heat” and the set-point at a minimum of 2 degrees above the temperature being shown. Watch for the “Heat On,” “Fire,” or “Sun” icons to appear. If the message or icon is flashing, the heating process may take up to three minutes to start.

Why is my Honeywell thermostat blinking heat on?

If it blinks, it is in time delay. Normally, it takes five minutes. As it solidifies, the heat will be switched on. By flashing and protecting equipment from short cycles, you are indicating that you want heat.

Conclusion:

Now you clearly understand what does it mean when heat on flashes on thermostat, it only indicating the heater is about to start once the heat symbol flashing stop, it means your heater is getting ready to heat you up.  However the problem arises when the thermostat keeps blinking or flashing stop but the heater is not on.