Error code reference
Ingersoll Rand Furnace Error Code E3.2
Open pressure switch, 1st stage (pressure switch is open when it should be closed).
Open pressure switch, 1st stage (pressure switch is open when it should be closed).
First step from the service manual
Verify PS1 orientation is correct for application, cycle power and call for 1st stage heat, verify inducer motor is running and ~120VAC is present from RD to WH on inducer motor.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
- Verified part numbers when replacement is required
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