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All brands · Air conditioner troubleshooting

Superheat below target

What is going on

Possible causes and checks for: superheat below target.

Likely causes

  • Overcharge
  • Metering device malfunction (overfeeding)
  • Inadequate evaporator airflow

Check in this order

  1. Check filter/blower/coil
  2. Verify charge by weight
  3. Check metering device

More air conditioner guides

Related

Calculators and reference tables

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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.