Carrier Furnace Control Board Troubleshooting

The next most common step in ac troubleshooting is checking for a dirty air filter.

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 gas furnace troubleshooting step by step. Here is a picture of two limits and one rollout switch. That is true for air conditioner troubleshooting heat pump troubleshooting or gas furnace troubleshooting.

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 circuit board in the most common system works off of input and output. Changing the filter was the only thing so far that might have helped resolve this. Most systems also include an indoor air handler unit usually a furnace or fan coil.

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. Your ac system is more than just the outdoor unit sitting by the side of your home. This can easily be overlooked. 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.

How to change the furnace filter varies with different carrier heaters so refer to your unit s manual. Nordyne m1m n1b series error codes m1m m1b series nordyne error codes png. Repairclinic jumped to the last and least likely reasons for this error. You can purchase a filter from an appliance hardware or retail store if you have your unit s.

Sometimes the thermostat gets turned off or the setting changed by accident. The indoor unit should include an air filter that traps dust dirt and other airborne particles. In some cases this will be line voltage and in other cases the board will get its power from the control transformer. First make sure you have power to the board.

Reset power to the furnace. 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.