What if your Honeywell thermostat flashing cool on warning signs most of the time? It is not uncommon for the AC thermostat to be troublesome once in a while. After all, most electronic devices are due to malfunction and have problems.
About the Honeywell Thermostat
Today’s modern home has its own sophisticated technologies, including the AC thermostat. Electronic thermostats are quite common these days, and they are mostly powered by batteries.
As an HVAC technician, I’ve found that regularly changing the batteries can prevent many common issues with electronic thermostats. When the battery is low, the thermostat might not read the temperature correctly or may fail to turn on at all.
For instance, I once encountered a situation in which the thermostat wasn’t turning on the AC because the batteries were almost dead, and replacing them immediately resolved the issue.
If you want your device to run well, you must change the batteries regularly.
Electronic thermostats are basically auto switches that turn the AC unit on (and off) at a certain temperature. When the battery is low, the switch may not work properly to turn the device on. It is also possible that it may not read the temperature correctly.
The Possible Reasons and How to Deal with It
If your Honeywell thermostat is flashing cool on, or it is even possible that the Honeywell thermostat is blinking heat on sign, you can check the AC’s fuses and the circuit breakers. When discussing the central AC, the unit may have different fuses within the electric system. There are some schemes that you can do:
- Try resetting the AC’s fuse. Go to the electrical box and turn it off and then on again.
- Check the fuse. However, call the repair service if you see multiple fuses and are completely clueless. It wouldn’t be wise to try to figure it out by yourself, let alone try to replace and fix everything on your own.
- Find the reset button. If your units are pretty new, they likely have visible reset buttons that can be used to restart the system.
- It may seem foolish, but waiting is the best thing you can do, especially during a sudden electricity stop or interruption, such as a power outage. You can do everything you want by the book, but in most cases, the unit must adjust and make several internal changes in response to the new situation.
- If you see the Honeywell thermostat flashing cool on, give it 15 to 20 minutes. Just turn everything off and wait. After the minute has passed, try to turn it on again. If nothing happens, contact the manufacturer’s customer service. But if the system works again, you only need to give it time.
Read also: Honeywell Thermostat Battery Replacement in Easy Ways
Troubleshooting Tips
| Issue | Possible Cause | Solution |
|---|---|---|
| The thermostat is not turning on the AC | AC in delay mode | Wait for 5 minutes |
| The thermostat shows an incorrect temperature | Low battery | Replace batteries |
| The thermostat is not turning on AC | Dirty sensors | Clean the thermostat |
| AC not responding | Tripped circuit breaker | Reset the circuit breaker |
Final Thoughts
You may find it easier to contact customer service or any repair service than to handle the problem independently. But in most cases, you only need to spend extra time to figure it out.
“From my experience, consulting the manual and trying out the suggested troubleshooting steps often resolves many issues. For instance, when I encountered a situation where the thermostat was flashing ‘cool on’, I followed the manual’s advice to wait for 5 minutes, and it worked perfectly.”
The best way to do this is to consult the manual and find the answer to your problems. If you have read the manual and are still clueless, then it is time to call Honeywell customer service.
