Carrier Furnace Control Board Troubleshooting

Nordyne m1m n1b series error codes m1m m1b series nordyne error codes png.

Carrier furnace control board troubleshooting.

In some cases this will be line voltage and in other cases the board will get its power from the control transformer. That is true for air conditioner troubleshooting heat pump troubleshooting or gas furnace troubleshooting. 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. Repairclinic jumped to the last and least likely reasons for this error.

If code persists you need a technician onsite to properly diagnose ad repair. First make sure you have power to the board. How to change the furnace filter varies with different carrier heaters so refer to your unit s manual. Sometimes the thermostat gets turned off or the setting changed by accident.

This can easily be overlooked. A hard lockout will automatically reset if the hardware fault clears. A circuit board in the most common system works off of input and output. Here is a picture of two limits and one rollout switch.

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. 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. The indoor unit should include an air filter that traps dust dirt and other airborne particles. 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.

Most systems also include an indoor air handler unit usually a furnace or fan coil. Carrier gas furnace troubleshooting step by step. You can purchase a filter from an appliance hardware or retail store if you have your unit s. Changing the filter was the only thing so far that might have helped resolve this.

The next most common step in ac troubleshooting is checking for a dirty air filter. Reset power to the furnace.