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Carrier 25VNA860 Error Codes

Updated · by Aurora Star Tech Inc.

Carrier 25VNA860 error codes and diagnostic codes. The 25VNA860 is a Carrier heat pump in the Carrier Infinity 18VS 25VNA8 series.

Homeowner with a heat pump problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Carrier 25VNA860 error codes list

CodeMeaningSeverity
25Invalid model plug / inverter sizeHigh
31High pressure switch openHigh
32Low pressure tripMedium
33Lost inverter communicationMedium
46BrownoutMedium
48Lost inverter communication - lockoutHigh
49Compressor over currentMedium
53Outdoor air temperature sensor faultMedium
54Suction temperature sensor faultMedium
55Outdoor coil temperature sensor faultMedium
56OAT / coil thermistor out of rangeMedium
57Suction pressure transducer faultMedium
59Discharge temperature high (event)Medium
61Fan inverter faultMedium
63Fan inverter current faultMedium
65DC bus voltage low - speed limitingMedium
66Outdoor fan dropped outMedium
67Stator heater faultMedium
6810-minute stage 2 warm-up delayLow
69Inverter / compressor internal faultHigh
71Compressor dropped outMedium
72Suction over temperature (event)Medium
74Discharge temperature lockoutHigh
75Maximum power mode - temperatureMedium
76Fan inverter lockoutHigh
77Maximum power mode - compressor currentMedium
79Compressor / inverter fault (failed start)Medium
82Suction over temperature lockoutHigh
83Low pressure lockout (4 hours)High
84High pressure lockout (4 hours)High
86Fan inverter current lockoutHigh
88Compressor / inverter lockoutHigh
91Inverter DC over voltage (event)Medium
92Inverter DC under voltage (event)Medium
95Compressor over current lockoutHigh
96DC under voltage lockoutHigh
97DC over voltage lockoutHigh
98High torque eventMedium
99High torque lockoutHigh

Troubleshooting the 25VNA860

All Carrier Heat Pump error codes →

Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

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