How to Troubleshoot a Faulty Thermostat, Part 1

Technician adjusting thermostatA thermostat controls nearly all central heating and air conditioning systems. When your system isn’t working to its full potential, it may be due to a thermostat issue and not a problem with the unit itself. If your home is not as comfortable as you want it to be, despite your efforts to alter the temperature, follow these troubleshooting tips before ruling out your thermostat.

If the System Produces no Heated or Cooled Air

If your HVAC system is not turning on at all, it’s possible that the thermostat is to blame. In most cases, a unit not turning on is the result of no electrical current reaching the components of the thermostat. This could be due to a tripped or blown fuse, dirty thermostat components, loose wires or an open connection, or a bad battery on digital thermostats.

How to Repair

If your HVAC system is not turning on, contact one of the HVAC companies in Williamsburg, VA, to schedule service. A specialized technician will most likely complete one or more of the following repairs.

  • Reset the circuit breaker
  • Remove the thermostat cover and clean the components, cleaning the bimetallic coil at various settings
  • Tighten any loose screws and place any loose wires back on the terminal clamp
  • Check for loose connections or disconnected wires
  • Check the display on electronic thermostats and replace batteries if necessary