E11
Pentair
Gas Valve Circuit Fault
Heater shows E11 and will not fire.
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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
Open or shorted gas valve coil, Loose gas valve wiring, Faulty ignition control board, Incorrect supply voltage to gas valve
How to Fix / Troubleshooting
Safety: Turn off power and gas. Gas valve work should be performed by a licensed gas technician.
- Visual inspection: Check the gas valve wiring harness for loose connectors, burns, or rodent damage. Reseat connectors firmly.
- Check supply voltage (technician only): With a multimeter and heater calling for heat, verify that the correct voltage is present at the gas valve terminals. If voltage is present but the valve does not open, the valve may be defective.
- Coil resistance test: With power off, measure resistance across the gas valve coil(s). An open or shorted coil indicates a bad valve.
- Replace gas valve or control: If the valve tests bad, replace it. If the valve is good but no voltage is sent during ignition, the ignition control or main board likely needs replacement.
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Repair Difficulty
Professional Required
5/5
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