Laars Error 105: Flame Detected Out of Sequence
The control sensed a flame signal when there should be none (for example before ignition or after shutdown). It stops as a safety measure. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The control sensed a flame signal when there should be none (for example before ignition or after shutdown). It stops as a safety measure.
Laars 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 Laars error 105
- Flame detector / flame rod wiring shorted or on wrong terminal
- Electrical noise on the flame-sense wiring
- Lingering or residual flame in the combustion chamber
- Faulty flame detector
- Failed control module
What you can safely check
- Cycle power off and back on once to clear the fault
- If it recurs, note that this needs a technician to inspect the flame-sense wiring
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 105 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 Laars repair.
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Parts often behind Laars error 105
Genuine Laars parts we supply and professionally install — never for DIY.
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Laars Error 105 Repair Across Metro Vancouver
Frequently Asked Questions
Fix Laars Error 105 Today
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