Err 19
Burnham
Gas Valve Proving or Internal Fault
Boiler shows “Err 19” and fan runs but burner does not light, often after service
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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
Gas valve coil open or shorted, Incorrect gas valve wiring, Internal valve fault detected by control, Control board output failure
How to Fix / Troubleshooting
Safety first: Turn off power and gas. Gas valve diagnostics should be performed by a qualified technician.
- Visual inspection: Check the gas valve body for signs of overheating, corrosion, or physical damage. Ensure the manual shutoff is open.
- Check wiring: Verify that all valve wires are connected to the correct terminals and are not pinched or damaged.
- Reset control: Restore power and attempt a reset. If Err 19 returns immediately, do not continue cycling the boiler.
- Professional testing: A technician should measure coil resistance, verify voltage at the valve during ignition, and replace the valve if it fails tests.
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Repair Difficulty
Professional Required
5/5
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