Boiler spark ignition clicking nonstop in Greater Vancouver

If your boiler clicks rapidly and continuously but never settles into a steady flame, the spark ignition system is trying to light and failing. The clicking is the igniter sparking over and over. This is a common boiler fault in Greater Vancouver homes, and while the cause varies, the gas-side work needed is a job for a professional.

Why the igniter keeps clicking

On a spark-ignition boiler, the control sends sparks to light the burner when there is a call for heat. If the flame does not establish, or the flame sensor does not confirm it, the control keeps sparking until it locks out. Common reasons include a dirty or misaligned igniter, a fouled flame sensor, a gas supply or pressure issue, or air in the gas line after a summer idle.

Because the boiler cannot prove a flame, it never moves past the ignition stage, which is why the clicking continues rather than giving way to a quiet, steady burn.

• Dirty or misaligned spark igniter
• Fouled flame sensor that cannot confirm the flame
• Gas supply or pressure problem preventing ignition
• Air in the gas line after a long idle period

Safe steps for homeowners

There are limited homeowner checks here. Confirm the thermostat is calling for heat and the boiler breaker is on, resetting it once if tripped, and verify the manual gas valve to the boiler is on. Avoid repeatedly cycling the boiler in hopes it catches, since that just repeats failed ignition attempts.

The igniter, flame sensor, and gas supply are gas-side items that a licensed technician should diagnose and service. If you smell gas at any time, do not operate switches; leave the home and call your gas utility's emergency line first.

• Confirm the thermostat is calling and the breaker is on
• Check that the manual gas valve to the boiler is on
• Do not keep cycling the boiler to force ignition
• Leave and call the gas utility if you smell gas

Frequently Asked Questions

Why does my boiler click but never light?

The spark igniter is firing but the burner is not establishing a proven flame, so the control keeps sparking until it locks out. Causes include a dirty igniter or sensor, a gas pressure issue, or air in the line.

Is constant ignition clicking dangerous?

The control is designed to lock out rather than keep releasing gas without a flame, but the fault should still be diagnosed promptly. If you ever smell gas, leave the home and call your gas utility's emergency line first.

Can I clean the igniter or flame sensor myself?

No. These are gas-side components that require a licensed technician to clean, align, or replace and to verify safe ignition afterward.

Why did this start after the summer?

Air can enter the gas line during a long idle period, and dust can settle on the igniter and sensor, both of which interfere with ignition. A pre-season service helps prevent this.

HeatLand Heating & Cooling is a licensed and insured, TSBC-certified HVAC company serving homeowners across Greater Vancouver. Our technicians diagnose the real fault, explain your options in plain language, and complete the work safely and to code.

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