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M
mfloresJul 26, 2025
Why does my Vaillant Boiler go to lockout?
- JJeremy EvansJul 26, 2025
If your Vaillant Boiler goes to lockout, it could be due to several reasons: * There might be no gas supply available, so ensure that the gas supply is on. * There could be insufficient gas, in which case you should check the gas supply pressure. * The gas valve adjustment might be incorrect, requiring you to adjust the gas valve correctly. * The electrode could be defective, so inspect and replace the electrode if necessary. * The ignition lead might have issues, requiring you to check the ignition lead. * The electronic igniter could be defective, so test and replace the electronic igniter if necessary. * There might be blockages in the air inlet duct, so examine the air inlet duct.
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