Boiler Reset Light On
When your boiler's reset light illuminates — whether solid or flashing — it means the boiler's control system has detected a fault and locked out as a safety precaution. The reset light is a symptom, not the problem itself. Figuring out why the boiler locked out is the key to getting it running again.
Common triggers for boiler lockout include ignition failure, flame loss during operation, overheating, low water pressure, or a blocked condensate pipe. Our licensed technicians read the fault memory on your boiler's control board to identify exactly what triggered the lockout, then fix the underlying cause — not just press reset.
What Causes the Reset Light to Come On
The boiler's PCB monitors dozens of sensors — flame detection, water pressure, temperature, fan speed, flue gas — and will lock out if any reading falls outside the safe operating range. Common triggers include ignition failure (boiler tries to light but fails), flame loss (flame goes out mid-operation), overheating, low pressure, or condensate blockage. Some faults are transient; if the light comes back immediately after reset, the fault is active.
Our Lockout Diagnostic Process
We connect diagnostic tools to read the boiler's fault history, which tells us exactly which sensor or component triggered the lockout. We verify by replicating the fault condition and testing the relevant components. Once diagnosed, we provide a fixed quote and repair using genuine OEM parts.
This is not a DIY repair
Combi boilers are gas-fired appliances regulated under the BC Safety Standards Act. Opening the unit, touching the gas valve, or working on the flue without a valid BC gas-fitter licence is both unsafe and illegal. Diagnosing the fault is helpful — fixing it should always be left to a certified technician.
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