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All brands · Refrigeration troubleshooting

Evaporator iced up

What is going on

Possible causes and checks for: evaporator iced up.

Likely causes

  • Solenoid stuck closed
  • Coil open-circuit
  • Timer bad

Check in this order

  1. Check coil/timer electrically
  2. Rap valve with timer closed — hear hot-gas surge/line warms

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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.