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Goodman · Furnace

EEd Condensate or auxiliary alarm switch open

Medium severity ACVC96AMVC96GCVC96GMVC96

What the control is telling you

The AUX switch input has opened, which means the evaporator base pan water level is too high. The control turns off the outdoor condensing unit and shows EEd. Normal operation returns and the message clears once the switch has been closed for 30 seconds.

Applies to: All 34.5in chassis furnaces with condensate switch

Likely causes

  • Blocked or slow condensate drain or trap
  • Water level too high in the evaporator coil base pan
  • Condensate switch open or wired wrong

Test and repair steps

  1. Check the condensate drain tubes, trap and field drain line for blockage.
  2. Clear the drain and confirm the base pan is draining.
  3. Check the condensate switch and its wiring at the AUX input.
  4. Confirm the switch closes for 30 seconds, then verify the code clears.

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Source: Goodman GMVC96 service and troubleshooting manual, p. 32. Summarized in our own words; check the original manual for your model.

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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.