E22
Weishaupt
Oil Pressure / Oil Supply Fault
Boiler shows E22, oil pressure fault on Weishaupt oil burner (if configured).
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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
Empty oil tank, Blocked oil filter, Air in oil line, Faulty oil pump on Weishaupt burner
How to Fix / Troubleshooting
Safety first: Turn off power. Oil is flammable; avoid open flames and clean spills immediately.
- Check oil level: Confirm that the oil tank has sufficient fuel and that any shut-off valves are open.
- Inspect oil filter: Replace or clean the oil filter cartridge at the tank or burner. Bleed air from the filter housing.
- Bleed oil line: Loosen the bleed screw on the oil pump and run the burner briefly to expel air, catching oil in a container. Tighten the screw once a solid stream of oil appears.
- Check pump pressure: A technician should measure and adjust pump pressure to Weishaupt specifications.
When to call a professional: Persistent oil pressure faults or pump replacement require a qualified oil burner technician.
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Repair Difficulty
Hard
4/5
Required Part
Oil Pump (Weishaupt Burner)
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