The “cool on” message on a honeywell thermostat is also known as “delay mode”.

Honeywell cool on blinking. Crank thermostat down to the lowest temperature. Honeywell thermostat cool on blinking: Power outage or any interruptions in the power cause the thermostat to automatically switch to the setup mode.

To check this, turn down your thermostat to. Here are the main reasons why your honeywell thermostat is blinking “cool on”: If your honeywell thermostat is flashing cool on, or it is even possible that the honeywell thermostat blinking heat on sign, you can check the ac’s fuses and the circuit breakers.

A power outage or some other interruption associated with a power source can trigger the. 1.with a heat pump installation process, blinks are replaced with “flashing.”. If the thermostat is installed in this.

The first step is to determine if your system is cooling at all and if it can control it. The reason the light is flashing is that the power outage has switched the thermostat back to setup mode. Someone tried to restart the compressor before the refrigerant had time to settle.

If your honeywell thermostat is blinking but not working, it could be due to a number of different issues. Luckily this is an easy enough thing to fix. The first thing you should check is the batteries.

When a honeywell thermostat is in setup mode it normally. The cool on message also appears on screen when ac gives a 5 minutes cooldown time to the compressor or if blower motor is not working properly. You may also check and reconfigure the clock settings to make it set accordingly.