E018
John Wood
Wind Pressure / Vent Pressure Fault
John Wood power vent water heater shows E018 and shuts down during windy conditions
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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
Improper vent termination location, Wind-driven backpressure on vent, Oversensitive pressure switch, Loose vent joints allowing air leaks
How to Fix / Troubleshooting
Safety: Turn off power and gas before modifying venting.
- 1. Inspect vent termination: Ensure the vent outlet meets John Wood clearance requirements from corners, soffits, and other structures. Relocate if wind frequently blows directly into the termination.
- 2. Secure vent joints: Check all vent pipe joints for proper cementing and support. Seal any leaks that could affect pressure readings.
- 3. Shield termination: In some cases, adding an approved vent hood or wind shield (per manufacturer guidelines) can reduce wind effects.
- 4. Pressure switch check: Test the pressure switch operation; replace if it trips too easily compared to specifications.
- 5. Professional evaluation: Persistent wind-related shutdowns may require a venting redesign by a qualified installer.
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Repair Difficulty
Hard
4/5
Required Part
Vent Termination Kit
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