Burnham Error 12: Flame Detected Out of Sequence
Hard lockout: a flame signal was present when there should be no flame. The safety control locks out because it cannot verify the burner is truly off. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
Hard lockout: a flame signal was present when there should be no flame. The safety control locks out because it cannot verify the burner is truly off.
Burnham fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of Burnham error 12
- Gas valve leaking through / not fully closing
- Flame sensor (flame rod) detecting a false or residual signal
- Moisture or shorting on the flame-sensing circuit
- Defective Sage control flame-proving circuit
What you can safely check
- This is a safety lockout — do not attempt repairs
- Shut off gas to the boiler if you smell gas and call your gas utility / a licensed technician
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
Error 12 usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Burnham repair.
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For your safety and to keep your manufacturer warranty valid, BoilerPart.ca does not sell loose boiler parts over the counter or for self-installation. Under BC regulations, gas appliance components must be installed by a licensed gas fitter. Every part we source is genuine OEM and is professionally fitted, tested, and certified by our Technical Safety BC–licensed technicians as part of a complete repair or installation.
Parts often behind Burnham error 12
Genuine Burnham parts we supply and professionally install — never for DIY.
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All work is completed by Technical Safety BC–licensed gas fitters (Licence LGA0043870, Boiler Permit LBP0046450). We are fully licensed, bonded and insured for your protection.
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Burnham Error 12 Repair Across Metro Vancouver
Related Burnham Ignition & Flame Codes
Frequently Asked Questions
Fix Burnham Error 12 Today
Licensed Burnham diagnosis and repair with genuine parts — same-day and after-hours across Greater Vancouver.
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