How to Fix Honeywell Thermostat Flashing Heat on

Honeywell is a well-known brand that manufactured thermostat. Thermostat itself is a device that helps you to maintain suitable temperature inside your house, by triggering air conditioning or heating system when the temperature rises or drops from particular temperature that’s already been set.

Read also : Common Honeywell Thermostat Troubleshooting

Now, if you wonder why Honeywell thermostat flashing heat on my thermostat is blinking, you may read further below to know how to fix this problem.

Resolving Honeywell Thermostat Flashing Heat

The main indication that your Honeywell thermostat is probably not working properly is that your house temperature is colder or warmer that it supposed to be. In general, malfunction by failing to maintain steady temperature should be enough to tell you that something is wrong.

Honeywell Thermostat Flashing Heat on

Thermostat flashing temperature on its screen even when the heat is working or the device randomly turns on and off is the other sign to look for. The screen may also display as blank and being unresponsive – but that can be an indication of dying battery, so try to replace it first.

Read Also : How to reset honeywell thermostat

There are various reasons of this occurrence. A wire that’s attached poorly or loosely might be the reason why Honeywell thermostat flashing heat on my thermostat is blinking. 

By checking the connection between the wires and your thermostat terminal manually, you might find out if it’s truly the cause. If the problem persists, then try to check if the mercury switch on your thermostat is entirely level.

Accumulated dirt inside the device is another possible reason why your Honeywell thermostat blinking house or other icons. You might want to check what’s going on behind the cover and try to clean and see if it helps. Now, if you’ve done all the inspections and find that the device looks fine, the issue may lay in the broken sensor. Here’s how to fix it:

  1. Try to change your thermostat setting manually. This can be done by pressing the “Up” arrow. After that, press the option that says “Switch to Permanent Hold.” Your thermostat setting then will switch by matching with outdoor temperature.
  1. The blinking flashing heat means that once you’ve set the device to heat. It shows that the safety timer that’s used to protect compressor inside the thermostat has issue. If the blinking already stopped, the device will be able to keep up with the heat setting again.
  1. See if various reasons above might be one of the causes why your thermostat is undergoing the blinking problem. However, if it’s the sensor that’s broken, you might need to replace the device because it’s more affordable than to repair the sensor.

Extreme temperature on summer and winter days makes it impossible to ignore any issue with thermostat. Luckily, the problem of Honeywell thermostat flashing heat on my thermostat is blinking doesn’t have to cost you a lot to repair.

It’s also great that modern programmable thermostats that are available nowadays can give early warn if there is any problem happened with the device so you can fix it as soon as possible.

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