Here are the main reasons why your honeywell thermostat is blinking “cool on”:

Thermostat blinking cool on. Dirty coils can cause honeywell thermostat flashing “cool on”. A “cool on” message can also appear if the thermostat logs out or times out on its own. Honeywell thermostat cool on blinking is a very common issue for honeywell users.

After years or months of work, dirt and debris will eventually accumulate on the the condenser or evaporator coils preventing. If you do not know the proper troubleshooting methods, you can get tensed over something. The reason the light is flashing is that the power outage has switched the thermostat back to setup mode.

To check this, turn down your thermostat to. Luckily this is an easy enough thing to fix. The blinking “cool on” message on a honeywell thermostat display indicates that the system is restarting, batteries need replacing in the control panel, or a fault with the.

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. Crank thermostat down to the lowest temperature. A power outage or some other interruption associated with a power source can trigger the.

The first step is to determine if your system is cooling at all and if it can control it. When a honeywell thermostat is in setup mode it normally. How long will thermostat blinking “cool on” last?

This is most often caused because power was. Someone tried to restart the compressor before the refrigerant had time to settle. If your thermostat is showing a blinking snowflake icon don’t panic, there’s nothing wrong with your system.