Fraser-Johnston Compressor Overheat / High Temperature Protection in Heat Mode

H2 code, unit stops heating to protect compressor

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

Low refrigerant charge, Blocked outdoor coil, Failed outdoor fan motor, Faulty discharge temperature sensor

Safety: Turn off power at the outdoor disconnect.

Clean outdoor coil: Remove debris and wash the coil as described for other high-pressure faults.
Check outdoor fan: Ensure the fan runs whenever the compressor is on. Replace fan motor or capacitor if not operating.
Inspect discharge sensor: Verify the sensor is properly attached and test resistance. Replace if defective.
Professional diagnosis: If H2 persists, have a technician check refrigerant charge and system pressures.

Hard 4/5

Outdoor Fan Motor

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