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No cooling, compressor runs, condenser fan off, very high head, compressor cycling on overload

What is going on

Possible causes and checks for: no cooling, compressor runs, condenser fan off, very high head, compressor cycling on overload.

Likely causes

  • Condenser fan motor open winding (infinite Ω), bad run cap, dirty coil

Check in this order

  1. Power off, ohm motor, replace fan motor, check rotation. (Scenario 32A) p.874 [848]

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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.