Error code reference

Carrier HVAC Error Code 25

Invalid motor / model selection: motor size is incorrect for fan coil size or fan coil size data is invalid.

SourceCarrier Fan Coil Units - Service Manual: FB/FE/FF/FH/FV/FX/FZ/PF Seriesp. 15

Diagnostic procedure

The full 25 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

If model size data is missing (replacement control installed), User Interface will prompt installer to enter correct model size. If motor size is incorrect, replace motor with proper size.

SourceCarrier Fan Coil Units - Service Manual: FB/FE/FF/FH/FV/FX/FZ/PF Seriesp. 15

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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 Carrier hvac.

Models covered by the manuals that document this code

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The full 25 procedure

Where this code is documented

Models covered by the manuals that document this code

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