If your thermostat isn’t giving a sign to your equipment to start, it won’t turn on.
The most important step is ensuring it’s on “cool” and not “heat.” Otherwise your air conditioning might not turn on. Or you could have. warm air moving from vents since the furnace is on instead.
If you’re using a regular thermostat:
- Swap out the batteries if the screen is blank. If the readout is showing garbled letters, replace the thermostat.
- Make sure the correct mode is displaying. If you can’t alter it, override it by lowering the temperature and pushing the “hold” button. This will make your AC start if programming is incorrect.
- Try setting the thermostat 5 degrees lower than the space’s temperature. Your AC won’t start if the thermostat matches the space’s temperature.
Once your thermostat is adjusted correctly, you should start getting cold air quickly.
If you rely on a smart thermostat, including ones produced by Nest, Ecobee, Lux, Honeywell or Bosch, go to the manufacturer’s website for troubleshooting. If you’re still having problems, call us at 717-383-4479 for help.