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No cooling, system running, house 81°F at 72°F set, high temp split, low suction, ice on coil

What is going on

Possible causes and checks for: no cooling, system running, house 81°f at 72°f set, high temp split, low suction, ice on coil.

Likely causes

  • Dirty filter, dirty evaporator, failed indoor blower, undersized ducts (low airflow)

Check in this order

  1. New filter, thaw coil, clean coil, check blower
  2. Recheck split 16–20°F. (32B) p.875 [849]

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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.