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Goodman gas furnace code E9: High-stage pressure switch not closing

Gas furnace, Canada and United States

The high-stage pressure switch circuit does not close while the inducer runs. The furnace runs on low stage only.

This needs a licensed gas technician. There are a few safe checks you can do first, marked below. Anything inside the unit is a job for a professional.

This involves the flue or exhaust. A blocked or leaking flue can let carbon monoxide into the home.

What causes it

  1. The pressure switch hose is blocked, pinched or connected wrongly.

    Book a licensed gas technician

  2. The flue or combustion air pipe is blocked, or the inducer is weak.

    Check the outside flue or vent terminal is clearYou can do this

    1. Find where the flue or vent pipe ends outside the building. High-efficiency furnaces and some water heaters also have a combustion air intake pipe beside it: check that one too. On some outdoor water heaters the flue outlet is part of the front cover.
    2. Look for anything blocking it, such as leaves, a bird or insect nest, snow, plants, or items stored against the wall.
    3. Cut back plants and move stored items away from it. Do not touch, poke into or hose the flue outlet. If something is inside it, book a service.
      The terminal can be hot. Do not climb onto the roof or use a ladder to reach it; if it is out of reach, book a technician.

    Book a licensed gas technician

  3. The furnace's condensate drain system is blocked. A technician checks the drain.

    Book a licensed gas technician

  4. The pressure switch has the wrong set point or its contacts are faulty.

    Book a licensed gas technician

  5. Loose or wrongly connected wiring.

    Book a licensed gas technician

How to read this code on your unit

The code shows on the two-character display on the furnace control board, which you can see through the sight glass on the blower compartment. On means normal operation. A blank display means the board has no power or has failed. A ComfortNet thermostat, if fitted, shows the same codes with a short message and uses EE for an internal fault.

Booking a licensed gas technician

Book a licensed gas technicianlicensed gas technician

  1. Turn the unit off and leave the covers on. Gas components must only be serviced by a licensed technician.
  2. Note the code, how often it appears, and the model and serial numbers from the rating label.
  3. Book a licensed gas technician and give them those details.

Models that show this code

66 models in 4 ranges
RangeModels
GMVC8 / GCVC8 / AMVC8 / ACVC8GMVC80603BN, GMVC80603BX, GMVC80604BN, GMVC80604BX, GMVC80803BN, GMVC80803BX, GMVC80804CN, GMVC80804CX, GMVC80805CN, GMVC80805CX, GMVC80805DN, GMVC80805DX, GMVC81005CN, GMVC81005CX, AMVC80603BN, AMVC80603BX, AMVC80604BN, AMVC80604BX, AMVC80803BN, AMVC80803BX, AMVC80804CN, AMVC80804CX, AMVC80805CN, AMVC80805CX, AMVC80805DN, AMVC80805DX, AMVC81005CN, AMVC81005CX
GMVC96 / GCVC96 / AMVC96 / ACVC96GMVC960403BN, GMVC960603BN, GMVC960803BN, GMVC960804CN, GMVC961005CN, GMVC961005DN, GMVC961205DN, GCVC960403BN, GCVC960603BN, GCVC960804CN, GCVC961005CN, GCVC961205DN, AMVC960403BN, AMVC960603BN, AMVC960803BN, AMVC960804CN, AMVC961005CN, AMVC961005DN, AMVC961205DN, ACVC960403BN, ACVC960603BN, ACVC960804CN, ACVC961005CN, ACVC961205DN
GMVM96 / GCVM96 / AMVM96 / ACVM96GMVM960603BX, GMVM960805CX, GMVM961005DX, GMVM961155DX
GMVM97 / GCVM97 / AMVM97 / ACVM97GMVM970603BN, GMVM970803BN, GMVM970804CN, GMVM971005CN, GMVM971205DN, AMVM970603BN, AMVM970803BN, AMVM970804CN, AMVM971005CN, AMVM971205DN

Where this comes from

Checked against the manufacturer's manual on 13 October 2026.

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Other Goodman gas furnace codes

Code Meaning What you can do
E1 Low-stage pressure switch closed at start of heating Call a pro
E2 Low-stage pressure switch not closing Safe checks first, then a pro
E8 High-stage pressure switch closed at start of heating Call a pro
EE1 Pressure switch closed at start of heating Call a pro
EE2 Pressure switch not closing Call a pro
EE8 High-stage pressure switch closed at start of heating Call a pro
EE9 High-stage pressure switch not closing Call a pro
2 red flashes Pressure switch closed when it should be open Call a pro
3 red flashes Pressure switch not closing Safe checks first, then a pro
3 double red flashes High-stage pressure switch stuck open Call a pro
6 red flashes Overheat / flue or venting fault (depends on model) Depends on your model
12 red flashes Flue or venting fault / ignition failure (depends on model) Call a pro

See all flue or venting fault codes on gas furnaces across brands.