Error code reference

Carrier HVAC Error Code 44

Motor communication fault: motor does not acknowledge receipt of communications from the fan coil control.

SourceCarrier Fan Coil Units - Service Manual: FB/FE/FF/FH/FV/FX/FZ/PF Seriesp. 14

Diagnostic procedure

The full 44 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 the motor wiring harness for proper connection to control and motor receptacles. Check motor wiring harness for complete circuit and no shorts.

SourceCarrier Fan Coil Units - Service Manual: FB/FE/FF/FH/FV/FX/FZ/PF Seriesp. 14

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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 44 procedure

Where this code is documented

Models covered by the manuals that document this code

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