H3 error and the outdoor unit stops; compressor may be very hot.

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

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

Safety first: Do not touch the compressor or pipes; they can be extremely hot.

Steps:

Clean outdoor coil: Remove dirt and debris from the condenser fins.
Check outdoor fan: Ensure the fan starts and runs at full speed when cooling or heating is demanded.
Allow cool-down: Turn the system off for at least 30 minutes to let the compressor cool before restarting.

If H3 recurs: A Bosch technician must check refrigerant charge, discharge temperature sensor, and compressor condition.

Hard 4/5

Outdoor Condenser Fan Motor

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