There might be two reasons in honeywell thermostat’ blinking:

Cool on blinking on thermostat. If your thermostat is showing a blinking snowflake icon don’t panic, there’s nothing wrong with your system. Your honeywell thermostat can also display “cool on” if your ac. This is often common for all people and zip can restore its value at any time.

Dirty coils can cause honeywell thermostat flashing “cool on”. The honeywell cool on flashing is very safe to use and zip can restore its value at any time. The reason the light is flashing is that the power outage has switched the thermostat back to setup mode.

Luckily this is an easy enough thing to fix. However, if your thermostat keeps blinking after the reset, you may have an issue like excessive defrosting or a switch in the outside unit that is stuck open. If you are switching from cool to heat and heat to cool, it puts a lot of pressure on thermostat and causes blinking.

How to set honeywell thermostat to cool. Thermostat blinks cool on or heat on is a safet. To check this, turn down your thermostat to.

My thermostat “cool on” is blinking. Here are the main reasons why your honeywell thermostat is blinking “cool on”: Leave the unit for a while and check whether the system is going to start cooling or not.

The reason why honeywell thermostat blinking cool on is maybe the thermostat devices taking delay time to prevent the ac from short cycling. Take a look at the display to see if the “battery low” light is flashing. The first step is to determine if your system is cooling at all and if it can control it.