Troubleshooting Boiler Ignition Problems in Metro Vancouver
When your boiler will not ignite, you are left without heat and often without hot water if you have a combi boiler. Ignition problems can be caused by a range of issues, from simple power supply problems to complex gas valve or control board failures. CANRO Heating and Cooling has been diagnosing and repairing boiler ignition issues in homes across Vancouver, Burnaby, Surrey, Richmond, Coquitlam, and Langley since 1989. This troubleshooting guide covers the most common causes of boiler ignition failure, steps you can take to diagnose the problem, and when to call a professional. Understanding the basics of boiler ignition helps you communicate effectively with your technician and potentially resolve simple issues without a service call.
Basic Checks for Boiler Ignition Failure
Before diving into complex diagnostics, check the simple things that can prevent boiler ignition. Verify that the boiler has power by checking that the display panel is lit and the power switch is on. Check your electrical panel for tripped breakers or blown fuses. Ensure the gas shutoff valve on the gas line to the boiler is fully open, the lever should be parallel to the pipe. Check that other gas appliances in your home are working to rule out a broader gas supply issue. Verify that the thermostat is set to heat mode and calling for heat. If your boiler has a standing pilot, check whether the pilot light is lit. If the pilot is out, try relighting it following the manufacturer's instructions. These basic checks resolve a surprising number of ignition failures.
Diagnosing Electronic Ignition System Failures
Modern boilers use electronic ignition systems that can fail in several ways. If you hear the ignitor clicking but the burner does not light, the problem may be a faulty ignitor that is not producing a spark, a gas valve that is not opening, or an air lock in the gas line. If you hear no clicking at all, the ignitor, control board, or flame sensing circuit may be at fault. Some boilers will attempt ignition multiple times before locking out, listen for three attempts separated by brief pauses. After the lockout, the boiler will display an error code that provides diagnostic information. If the boiler ignites briefly but then shuts off, the flame sensor may be dirty or faulty. Each of these scenarios requires specific diagnostic procedures and replacement parts that CANRO's technicians are equipped to handle.
When to Call CANRO for Ignition Service
If the basic checks do not resolve the ignition problem, or if the boiler attempts to ignite multiple times without success, call CANRO at (604) 559-1612. Repeated failed ignition attempts can flood the combustion chamber with unburned gas, creating a safety hazard. If you smell gas at any point, stop all troubleshooting, evacuate the building, and call FortisBC's emergency line at 1-800-663-9911 from outside. For persistent ignition problems, CANRO's licensed gas fitters will systematically diagnose the issue, testing the ignitor, flame sensor, gas valve, control board, and associated wiring. We carry replacement components for most major boiler brands and can typically complete same-day ignition repairs for homes throughout Metro Vancouver.
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.