Indoor unit shows HC and may shut down or limit operation.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Overheating of auxiliary heater, Blocked airflow, Faulty heater temperature limit switch, Wiring issue to heater kit

Safety first: Turn off power at the breaker. Electric heaters can pose fire and shock hazards.

Steps:

Check filters and airflow: Clean indoor filters and ensure supply registers are open.
Inspect heater compartment: On ducted MrCool air handlers with heat kits, inspect the electric heater assembly for dust buildup and ensure no wiring is burnt.

Technician tasks: Resetting or replacing high-limit switches and testing heater elements should be done by a qualified technician.

Hard 4/5

Electric Heat Kit Assembly

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