HVACopediaCarrier · Heat pump
98 High torque event
What the control is telling you
Amber STATUS light flashes 98. The compressor is working outside its allowed range so the inverter stages down. If it happens on the lowest stage it becomes code 99. Type: Event; reset: None.
Applies to: Carrier Infinity 18VS variable speed heat pump 25VNA8 (AOC control + inverter)
Likely causes
- Compressor outside its operating range
Test and repair steps
- Troubleshoot as code 99 if it keeps happening.
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Source: Carrier 25VNA8 / 24VNA9 Service Manual, Table 6 Fault Code Actions, p.25. Summarized in our own words; check the original manual for your model.
Homeowner looking at this code? See what it means for you and when to call a technician.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.