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EEF Condensate switch open

Medium severity Goodman/Amana *MVC96 (34.5 in. chassis)

What the control is telling you

The auxiliary (condensate) switch is open. The manual lists a high water level at the evaporator coil as the cause.

Applies to: GMVC96, GCVC96, AMVC96, ACVC96 (*BA, ComfortBridge)

Likely causes

  • High water level in the evaporator coil pan
  • Plugged coil drain, trap or drain piping

Test and repair steps

  1. Turn off power before touching wiring or the board.
  2. Check the evaporator drain pan, trap and drain piping. Clear any blockage so water drains freely.

Settings for these units

Models that show this code

16 models in Goodman/Amana *MVC96 (34.5 in. chassis)

*CVC960403BNB**CVC960603BNB**CVC960804CNB**CVC961005CNB**CVC961205DNB**MVC960403BNB**MVC960603BNB**MVC960803BNB**MVC960804CNB**MVC961005CNB**MVC961005DNB**MVC961205DNB*ACVC96AMVC96GCVC96GMVC96

Other codes on the same units

  • HP2 Heat pump heat, high stage
  • SH1 Special heat relay 1
  • SH2 Special heat relay 2
  • AC Cooling, single stage
  • Axx Airflow readout
  • CFS Comfort setting
  • FSd Constant fan speed
  • HEd Humidifier enable

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Source: Goodman Service and Troubleshooting ACVC96*BA/AMVC96*BA/GCVC96*BA/GMVC96*BA , Alarm Code Table p.56 / Troubleshooting Chart p.62. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

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.