High stage pressure switch circuit is not closed.
Homeowner part this code names: furnace pressure switch hose.
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Amana EE9 means the high-stage pressure switch did not close. The furnace can still run on low stage, with the induced draft blower operating. The chart says to inspect the pressure switch hose, the flue and inlet piping, the drain, inducer performance, and the wiring. Look at the outdoor terminations. EE2 is the low-stage version of an open switch and does not leave you with low-stage heat.
Likely causes
- Pressure switch hose blocked, pinched, or needing repair
- Blocked flue and/or inlet air piping, or wrong length, elbows or termination
- Drain system problem
- Induced draft blower performance problem
- Loose wiring
Safe checks for EE9
- Look at the outdoor flue and inlet terminations for a blockage. Low stage may still heat the house
- Technicianinspect the pressure switch hose, flue and inlet piping, the drain, induced draft blower performance and the wiring
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician if high stage never comes on and EE9 remains after the outdoor pipes are clear.
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Parts & tools for this fix
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Furnace pressure switch hose: guide
In this code: Pressure switch hose blocked, pinched, or needing repair
Furnace pressure switch: guide
In this code: Pressure switch hose blocked, pinched, or needing repair
This one is for a technician to test or replace, so we only explain it and do not link to buy it.
Furnace inducer (draft) motor: guide
In this code: Induced draft blower performance problem
This one is for a technician to test or replace, so we only explain it and do not link to buy it.
Furnace blower (circulator) motor: guide
In this code: Induced draft blower performance problem
This one is for a technician to test or replace, so we only explain it and do not link to buy it.
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