Why Is My Boiler Not Firing or Starting?
CANRO Heating & Cooling provides expert advice on this common question for homeowners in Greater Vancouver. If you need professional service, our licensed technicians are available across the region.
Related Services from CANRO
CANRO Heating & Cooling provides comprehensive boiler service across Greater Vancouver, including diagnostic inspections, emergency repairs, scheduled maintenance, and system replacement. Our Red Seal certified technicians service all major brands and carry OEM parts in their vehicles. For emergency service related to this question, call (604) 359-1081.
When to Call a Professional for Help
While understanding the answer to this question is helpful, some situations require professional expertise. If you are uncertain about any step, if the problem recurs, or if you notice any signs of gas odour, carbon monoxide, or electrical hazards, contact CANRO Heating & Cooling immediately. Our licensed technicians across Greater Vancouver can provide expert diagnosis and repair. We recommend professional service for any issue that involves gas, electrical components, or safety-critical systems.
Answer: Why Is My Boiler Not Firing or Starting?
When your boiler receives power but will not fire up, the issue is typically in the ignition or gas supply. Check first that the gas supply valve is fully open (handle parallel to the pipe). Press the boiler reset button once — if the boiler has a lockout error, resetting may clear it temporarily. Common causes of no-fire include ignition failure from a worn ignitor, a gas valve that is not opening, a flame sensor that cannot detect the burner flame, an air pressure switch fault, or a control board error. If resetting does not work or the boiler locks out again immediately, professional diagnosis is needed.
Safety Reminder
If you smell gas, suspect carbon monoxide or believe there is an immediate danger, leave the property and contact emergency services or the appropriate gas emergency authority. Do not remain inside — exit the building immediately and call for help from outside.