Carrier Furnace Control Board Troubleshooting

If any of the safety controls like the furnace s limit rollout switches or pressure switch are open then the control board will not allow the furnace to start.

Carrier furnace control board troubleshooting.

Carrier gas furnace troubleshooting step by step. The indoor unit should include an air filter that traps dust dirt and other airborne particles. Here is a picture of two limits and one rollout switch. First make sure you have power to the board.

You can purchase a filter from an appliance hardware or retail store if you have your unit s. Carrier furnaces combine quality and performance in a durable attractive and compact cabinet. Nordyne m1m n1b series error codes m1m m1b series nordyne error codes png. How to change the furnace filter varies with different carrier heaters so refer to your unit s manual.

If the furnace s draft inducer will not start or if the blower motor will not start then this could very well be a control board problem. A circuit board in the most common system works off of input and output. Repairclinic jumped to the last and least likely reasons for this error. Additional comfort enhancing functions on select models include ideal humidity system technology for relief from hot and sticky summer air and comfortfan technology which allows you to select furnace fan speeds from the infinity system control.

The truth is many homeowners have thought their carrier furnace wasn t working but all they needed to do was to turn on the system or turn up the heat. A hard lockout will automatically reset if the hardware fault clears. In some cases this will be line voltage and in other cases the board will get its power from the control transformer. Most systems also include an indoor air handler unit usually a furnace or fan coil.

This can easily be overlooked. If code persists you need a technician onsite to properly diagnose ad repair. The next most common step in ac troubleshooting is checking for a dirty air filter. Reset power to the furnace.

Your ac system is more than just the outdoor unit sitting by the side of your home. Hard lockout if the control detects a fault on the control board the status led will be de energized and the control will lockout as long as the fault remains.