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Repeat compressor burnout

What is going on

Possible causes and checks for: repeat compressor burnout.

Likely causes

  • Moisture/dirt left in system
  • High head pressure (dirty condenser)
  • Low voltage
  • Bad safety devices
  • Low charge (poor motor cooling)

Check in this order

  1. Acid test oil
  2. Flush
  3. New drier(s) incl. suction drier
  4. Clean condenser
  5. Verify head pressure after
  6. Replace controls

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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.