Error code reference

Bosch Heat Pump Error Code P8

DC outdoor fan motor protection, typically caused by severe weather (fan running in standby due to high wind).

SourceBosch IDS 2.0 Split System Heat Pump - Full Service ManualSection 12.3.15, page 56

Diagnostic procedure

The full P8 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Power off until severe weather conditions subside.

SourceBosch IDS 2.0 Split System Heat Pump - Full Service ManualSection 12.3.15, page 56

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More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

1 manual in the MyPros+ library documents this code for Bosch heat pump.

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The full P8 procedure

Where this code is documented

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