Peerless Error A01: Ignition Error / Ignition Lockout
Locking (manual-reset) lockout after three consecutive unsuccessful ignition attempts — no flame established. Control displays an "A" code and the boiler will not fire until reset. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
Locking (manual-reset) lockout after three consecutive unsuccessful ignition attempts — no flame established. Control displays an "A" code and the boiler will not fire until reset.
Peerless 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 Peerless error A01
- No spark at the ignition electrode (incorrect 3/16" gap, corroded or cracked electrode)
- No or low gas supply / incorrect gas pressure at the valve
- Gas valve not opening (valve or wiring fault)
- Weak flame signal (under ~3.1 microamps) from a dirty or poorly connected flame sensor
- Loose or dirty wiring-harness connector at the control
What you can safely check
- Confirm the manual gas shutoff valve to the boiler is fully open
- Confirm other gas appliances in the home are getting gas (rules out a utility/supply outage)
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 A01 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 Peerless repair.
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Parts often behind Peerless error A01
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Peerless Error A01 Repair Across Metro Vancouver
Related Peerless Ignition & Flame Codes
Frequently Asked Questions
Fix Peerless Error A01 Today
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