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Goodman · Air handler troubleshooting

No electric heat - R-32 air handler heat kit

What is going on

Heat strips do not come on during an auxiliary/emergency heat call.

Likely causes

  • No line voltage to the air handler or heat kit
  • Transformer failure
  • No W signal from the thermostat
  • Contactor/sequencer not closing
  • Open fusible link
  • Open heater element
  • Open limit switch

Check in this order

  1. Check 240 V at the air handler panel; if missing check breakers or fuses and the wiring.
  2. Check 24 V at the transformer secondary; replace the transformer if missing.
  3. Check 24 V on W at the heat contactor; none = thermostat or wiring.
  4. Confirm the contactor(s) close; replace if not. Check line voltage at the contactor(s).
  5. Power off check each fusible link (opens at about 333 F) - find why it opened before replacing; never bypass.
  6. Ohm each heat element; replace open elements.
  7. Check limit switches (open at about 150 F); replace an open limit and look for low airflow.

Applies to: R-32 AMST, AWSF/AWST, ACSF air handlers with electric heat kits

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Source: Goodman RS6200301 R-32 GLXS/ALXS/GLZS/ALZS service (07-2024), Auxiliary Electric Heating flowchart p.48; heater limit/fuse link checks p.34. 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.