E2
Miller
Pressure Switch Did Not Open or Close Properly
Miller furnace digital display shows E2; inducer may run continuously.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Stuck pressure switch, Blocked pressure tubing, Faulty inducer motor, Control board sensing error
How to Fix / Troubleshooting
Safety: Turn off power before disconnecting any tubing or wiring.
- Inspect and replace pressure switch: Remove tubing and wires, test the switch with a meter for proper open/closed operation. Replace if it does not change state with inducer operation.
- Clean tubing and ports: Clear any debris or moisture from tubing and inducer port.
- Check inducer performance: Ensure the inducer starts promptly and runs smoothly. Replace if noisy, seized, or weak.
- Board check: If all else is normal, the control board may misread the switch and require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Pressure Switch
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