Heat Pump Service Manuals & Error Codes

Service manuals, error codes, and parts diagrams for heat pump repair across all major brands.

240Manuals

780Error Codes

6Brands

MyPros+ Max

Get step-by-step heat pump diagnostics from the service manual.

Step-by-step tests with expected resistance, voltage, and continuity values
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mypros+

mypros+ Max·Whirlpool Heat Pump

My appliance shows an error code

mypros+

Control board fault diagnosis

From Tech Sheet W10810403, p.8:

1.Access the service diagnostic mode using the tech sheet procedure. Record all stored fault codes from the error history, not just the most recent active code.

2.Measure control board supply voltage at the test points. Expected: 12 VDC and 5 VDC. A drop below 4.75 VDC on the logic rail points to a failed onboard regulator.

3.Inspect all connectors on the main control board for corrosion, thermal stress, or backed-out pins. Reseat each connector with the power disconnected.

Part WPW10804018

Electronic control board

Top Error Codes for Heat Pump Repair

CodeBrandDescription

1GEOutdoor EEPROM failure - EEPROM cannot read or write data.10GEMalfunction of defrost temperature sensor (Te) - sensor shorted,...11GESuction temperature sensor (Ts) failure - sensor shorted, open, or...12GEAmbient temperature sensor (Ta) failure - sensor shorted, open, or...13GEDischarge temperature sensor (Td) failure - sensor shorted, open, or...15GECommunication failure between the indoor and outdoor unit - no...16GELack of refrigerant or discharge pipe blocked - Td-Ts≥80°C 10 minutes...17GE4-way valve switching failure - indoor pipe and ambient temperature...18GELoss of synchronism detection - compressor motor desynchronizing due...2GEIPM overcurrent or short circuit detected by the inverter power...20GEIndoor thermal overload.21GEIndoor unit overload protection (heating mode) / Indoor coil frosted...23GEModule thermal overload - IPM heat sink temperature sensor detected...24GECompressor start failure, over-current - compressor failed to start...25GEPhase current protection (IPM) - compressor drive module input...

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Access 240 service manuals, 780 error codes, and step-by-step diagnostics for heat pump repair.