Troubleshooting Carrier Furnace Problems
- 1). Check the thermostat and make sure it set in the "heat" position. Set the temperature on the thermostat above the indoor temperature. Setting the temperature at least 70 degrees and higher is ideal.
- 2). Make sure the unit is getting power. Check the circuit breaker box to see if a breaker has tripped; restore it to the "On" position if needed.
- 3). Inspect the fan. Press the fan switch on the thermostat to turn it on. If the van is dirty, vacuum it to remove damaging particles.
- 4). Check the SSU switch on your heater if the device is still not producing adequate heat. The switch looks like a light switch on a gray box located at the furnace. Set the switch to the "ON" position.
- 5). Change the furnace filter. How to change the furnace filter varies with different Carrier heaters, so refer to your unit's manual. You can purchase a filter from an appliance, hardware or retail store if you have your unit's model number.
- 6). Inspect the return air grilles. If they are dirty, vacuum them to remove dirt, lint, cobwebs and debris. Make sure furniture is not in the way of the return air grilles. Inspect the supply air registers and make sure they are open and blowing air.
