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All brands · Refrigeration troubleshooting

Works, then warms up (repeating)

What is going on

Possible causes and checks for: works, then warms up (repeating).

Likely causes

  • Moisture in refrigerant freezing at metering device

Check in this order

  1. Install new liquid-line drier (recover/filter charge, evacuate, recharge)
  2. Confirm by warming metering device during off-cycle

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Source: General HVAC service practice — verify per model. Written in our own words; check the manual for your exact model.

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.