This is in place to prevent potential damage to your system’s.

Why is my thermostat blinking cool on. All you need to do is change the batteries in the thermostat. When a honeywell thermostat is in setup mode it normally. This can cause the cool on indicator to blink.

After years or months of work, dirt and debris will eventually accumulate on the the condenser or evaporator coils. Dirty coils can cause honeywell thermostat flashing “cool on”. Honeywell thermostat says cool on blinking or heat on flashing, but not working after changing batteries.

Leave the unit for a while and check whether the system is going to start cooling or not. Take a look at the display to see if the “battery low” light is flashing. Here are the main reasons why your honeywell thermostat is blinking “cool on”:

The reason why honeywell thermostat blinking cool on is maybe the thermostat devices taking delay time to prevent the ac from short cycling. Bring down the temperature to the lowest degree. Luckily this is an easy enough thing to fix.

The most common cause of a thermostat blinking green light is a problem with the heating system. If your thermostat is showing a blinking snowflake icon don’t panic, there’s nothing wrong with your system. Thermostat blinks cool on or heat on is a safet.

Early december in the southwest is usually cool. 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. The reason the light is flashing is that the power outage has switched the thermostat back to setup mode.