PRESSURE SWITCH ERROR (DISPLAY)
Gibson
Pressure Switch or Venting Fault
Display shows pressure switch error, furnace will not ignite
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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
Incorrect pressure switch setting for Gibson model, Water in pressure tubing, Blocked combustion air intake, Cracked heat exchanger affecting draft
How to Fix / Troubleshooting
Safety first: Turn off power and gas. Heat exchanger inspection should be done by a qualified technician.
Steps to check:
- Clear tubing and ports: Remove pressure tubing and clear any moisture. Inspect the port on the inducer housing for rust or blockage and clean gently.
- Check intake air: For sealed-combustion models, ensure the intake pipe is not blocked and terminates in a clean area.
- Reset and test: Reconnect tubing, restore power, and call for heat. If the error persists, the pressure switch or heat exchanger/draft conditions need professional evaluation.
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Repair Difficulty
Hard
4/5
Required Part
Pressure Switch
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