Check the thermostats power source after ensuring that its set to cooling mode i f your thermostat is hard wired check the fuse or circuit breaker. Go to step 2 in this article your system makes strange noises.

How To Program A Honeywell Thermostat
Thermostat won t stay on. Check the thermostats display to confirm that theres a call for cooling usually indicated by the words. When your home drops below or rises above a certain set temperature it triggers the heating or air conditioning to heat or cool your house. Check for dirt dust spider webs and nicotine buildup. On the front of the thermostat is a reset button. These can coat the inside of the thermostat and cause the. Finding out why your honeywell thermostat isnt working is key to solving the problem.
Check for loose. 2 remove the thermostats cover. Check the power source looking for things such as blown fuses tripped breakers and dead batteries. Verify that the thermostat is switched to cool mode and has a cooling set point below the room temperature reading. When the room is warmer than it should be you could just need to reset the thermostat to get the machine back up to its optimal speed. If the heating system wont turn on that is no heat or cooling is being delivered when you want it set the thermostat to its highest temperature setting and wait three to five minutes.
If the thermostat comes with batteries remove them. Here are some suggestions to try if your furnace wont turn on. Chattering stuttering clicking or thumping this can happen if your system turns on. 1 turn the power off to the heating system. Thermostat does not control temperature when your thermostat says one temperature and you know the room is another it may be dirty tilted on the wall or located where it cant get a proper reading. If your thermostat has a heat off cool or fan auto off control set the control to heat for heating and set the fan to auto.
Heating or cooling is always on and wont turn off heating or cooling repeatedly turns on and off in a short period you see a delayed or starts in. If its battery operated replace the batteries. If your braeburn air conditioner is not cooling turn the thermostat to the off position. Troubleshoot when your thermostat wont turn on if your google nest thermostat wont turn on and you see a blinking red or green light or no light at all there could be a power issue or your. But if your honeywell thermostat isnt maintaining its heat setting it wont properly heat your home. My thermostat is set to cool but my cooling system isnt runningwhy.