Error code reference

Bosch Heat Pump Error Code P0

Control board is over-heated due to poor heat dissipation, Tf sensor failure, or wrong T5/Tf connections.

SourceBosch IDS 2.0 Split System Heat Pump - Full Service ManualSection 12.3.9, page 50

Diagnostic procedure

The full P0 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

Check if T5 and Tf connections at control board are correct.

SourceBosch IDS 2.0 Split System Heat Pump - Full Service ManualSection 12.3.9, page 50

Unlock with pass

More steps, wiring diagram references, and verified part numbers

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

Unlock P0 procedure $9.95

Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.

Where this code is documented

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

75,000+ service documents · 20,000+ error codes · 100+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax

The full P0 procedure

Where this code is documented

Related Bosch heat pump error codes