Baxi Error E133: Ignition failure / gas supply fault
The boiler attempted to ignite but failed to detect a burner flame after its ignition sequence, so it locks out and shuts off the gas to prevent unsafe operation. On Baxi UK boilers this is the classic 'no ignition / gas supply' lockout; on the Luna Duo-Tec the same condition is logged as code 133 (Ignition failure). We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The boiler attempted to ignite but failed to detect a burner flame after its ignition sequence, so it locks out and shuts off the gas to prevent unsafe operation. On Baxi UK boilers this is the classic 'no ignition / gas supply' lockout; on the Luna Duo-Tec the same condition is logged as code 133 (Ignition failure).
Baxi 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 Baxi error E133
- No or interrupted gas supply (gas valve off, meter out of credit, or air in the gas line)
- Faulty or dirty ignition/flame-sensing electrode or loose electrode wiring
- Gas valve fault or incorrect gas pressure
- Frozen condensate pipe backing up and stalling combustion
- Faulty ignition control / PCB
What you can safely check
- Check that other gas appliances in the home still work (confirms the gas supply is on)
- Check the boiler pressure gauge reads roughly 1–1.5 bar
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 E133 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 Baxi repair.
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Parts often behind Baxi error E133
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Baxi Error E133 Repair Across Metro Vancouver
Related Baxi Ignition & Flame Codes
Frequently Asked Questions
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