Error code reference

Bosch Heat Pump Error Code H5

Low pressure protection hard lockout-occurs when P2 triggers 5 times in 100 minutes, requires hard restart.

SourceBosch IDS 2.0 Split System Heat Pump - Full Service ManualSection 12.3.11, page 52

Diagnostic procedure

The full H5 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 unit, power on unit, check if fault code is still displayed.

SourceBosch IDS 2.0 Split System Heat Pump - Full Service ManualSection 12.3.11, page 52

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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 H5 procedure

Where this code is documented

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