On the covered Goodman gas furnace, EE9 means the high-stage pressure switch circuit is not closed. The furnace fails to operate on high stage, runs normally on low stage, and the induced-draft blower operates. First, look for anything blocking the flue and inlet air pipes outside, such as snow, ice, leaves or a nest.
Differential
Likely causes of “Goodman gas furnace code EE9”, and how to tell them apart
- 1
A blocked flue or inlet air pipe
What separates it The furnace runs on low stage but fails on high; common after snow, ice or a nest
How to confirm Look outside at both pipe terminations
- 2
A cracked, loose or water-filled pressure hose
What separates it The hose looks collapsed or holds moisture
How to confirm Inspect the hose for cracks and for a low spot that holds condensate
- 3
An inducer that does not reach high speed
What separates it The inducer sounds the same on both stages
How to confirm A technician measures the pressure and the inducer's high-speed performance
- 4
Condensate trapped in the switch hose
What separates it A hose that sags between the inducer housing and the switch holds a plug of water that keeps the high-stage switch from seeing pressure
How to confirm With power off, a technician lifts the hose off and blows through it; it should pass air freely
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether low stage heats normally
- What the weather has done recently at the pipe ends
- Whether the hose is damp or loose
- The model number from the furnace label
Try in this order
0 of 5 completedWhat to do first
ReversibleLook for anything blocking the flue and inlet air pipes outside, such as snow, ice, leaves or a nest.
Correct only the documented fault domain
ReversibleGoodman's corrective actions: inspect the pressure-switch hose and repair or replace it, inspect the flue and inlet air piping for blockage, proper length, elbows and termination, check induced-draft blower performance and correct as necessary, and tighten or correct the wiring connection.
Go outside and look at both pipes
ReversibleClear snow, ice, leaves or a nest from the flue and the inlet air termination, keeping clear of exhaust gas.
Check the hose
ReversibleWith the furnace off, look at the pressure-switch hose and replace it if it is cracked, loose or holds water.
Let a technician test the inducer
ReversibleGoodman's corrective actions include checking the induced-draft blower's performance and the wiring connection at the switch.
Model-specific
What is true of this model and not of its siblings
- Shown as
- EE9 on the control board display.
- Applies to
- Goodman two-stage furnaces with a high-stage pressure switch.
Stop boundary
When this stops being a self-service repair
- !Do not jumper the high-stage switch
- !Call a technician for the inducer, hose and switch checks
Evidence ledger
Sources behind this answer
Exact questions
Common questions
What does EE9 mean on a Goodman gas furnace?+
The high-stage pressure switch circuit is not closed. The furnace fails to operate on high stage, runs normally on low stage, and the induced-draft blower operates.
Why does the furnace still heat?+
On this code it runs on low stage normally; only the high stage cannot prove its pressure switch.
Is it safe to keep using low stage?+
It may work, but the fault is still in the draft path. Have it checked before the next cold spell.
Can ice cause EE9?+
Yes. Ice on the pipe end, or a hose with condensate, can keep the switch from closing.
Does low stage running mean the vent is fine?+
Not necessarily. The high stage needs more draft, so a partly blocked pipe can pass the low-stage test and fail the high-stage one.
How soon should it be fixed?+
Before sustained cold weather, because the furnace will lean on its low stage for every call and may not keep up on the coldest days.