If your thermostat isn’t telling your system to start, it won’t switch on.
The most important point is checking it’s switched to “cool” and not “heat.” Otherwise your AC may not turn on. Or you might receive. warm air blowing from vents because the heater is running instead.
If you’re using a digital thermostat:
- Put in new batteries if the monitor is clear. If the readout is displaying scrambled characters, get a new thermostat.
- Make sure the correct option is on the display. If you can’t update it, override it by dropping the temperature and hitting the “hold” button. This will force your AC to work if the configuration is not right.
- Test setting the thermostat 5 degrees below the space’s temperature. Your AC won’t start if the thermostat is identical to the house’s temperature.
Once your thermostat is set correctly, you should start getting cool air quickly.
If you have a smart thermostat, such as one produced by Nest, Ecobee, Lux, Honeywell or Bosch, check the manufacturer’s website for troubleshooting. If you still can’t get it to work, reach us at 215-741-5505 for support.