Weil-McLain Error E00: Flame Detected on Startup
The control sensed a flame signal during standby or pre-purge, before the burner was commanded to fire. This is a safety hard lockout indicating the control is seeing flame when none should be present. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The control sensed a flame signal during standby or pre-purge, before the burner was commanded to fire. This is a safety hard lockout indicating the control is seeing flame when none should be present.
Weil-McLain 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 Weil-McLain error E00
- Lingering/false flame signal from a contaminated flame sensor
- Gas valve leaking through and allowing residual combustion
- Faulty flame-sensing electrode or wiring
- Control board reading a stray electrical signal
- Damp or shorted flame sensor wiring
What you can safely check
- Power-cycle the boiler at the service switch (off 30 seconds, then on) and watch whether the code clears
- Confirm gas is reaching other appliances normally to rule out a supply problem
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 E00 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 Weil-McLain repair.
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Parts often behind Weil-McLain error E00
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Weil-McLain Error E00 Repair Across Metro Vancouver
Related Weil-McLain Ignition & Flame Codes
Frequently Asked Questions
Fix Weil-McLain Error E00 Today
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