Gas valves range from a simple on-off switch to a fully modulating valve, which is exactly why the price for replacing one varies so widely.
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Quick answer
Replacing a gas valve on a Port Moody boiler typically costs $200 to $1,100 installed, on top of the usual $90 to $150 diagnostic visit. That's a wide range because gas valves themselves vary enormously in complexity, and it's a 2026 public-market ballpark rather than a fixed quote until a certified CANRO technician has confirmed the valve, not something upstream of it, is actually the problem. Because a stuck or failed gas valve stops the boiler from producing heat entirely, this is usually treated as a priority repair.
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The gas valve sits between the incoming gas line and the burner, and it's the last safety-rated component that opens to let gas flow once the control board has confirmed everything upstream is ready. On simpler boilers it's essentially an electronically controlled on-off valve. On many modern condensing boilers it's a modulating valve with a built-in regulator and actuator, adjusting the gas flow continuously to match the burner's firing rate rather than just switching fully on or off.
That difference in complexity is the main reason the cost of this part swings so widely. A basic combination gas valve is a relatively inexpensive, well-proven part, while an integrated modulating valve with its own control electronics sits at the higher end of the range.
Because a gas valve is one of the pricier single-part repairs, a careful technician confirms it's genuinely at fault before ordering one. That means checking that the correct voltage is actually reaching the valve from the control board, testing the valve's coil resistance against what the manufacturer specifies, confirming incoming gas pressure is adequate, and ruling out a blocked burner orifice or a wiring fault that could produce the exact same symptoms for a fraction of the cost.
| Factor | Effect on cost |
|---|---|
| Simple on-off valve vs. integrated modulating valve | Modulating valves with built-in electronics cost more |
| Whether it's a common or less common valve model | Availability affects both part cost and how quickly the repair happens |
| Access to the gas train on your specific boiler | Tight installations take longer to service safely |
| Whether gas piping needs to be adjusted during the swap | Any fitting changes add labour and materials |
| Item | Typical range (CAD) | Notes |
|---|---|---|
| Diagnostic / service call | $90 – $150 | Includes voltage and pressure testing before condemning the valve |
| Gas valve, installed | $200 – $1,100 | Wide range reflects simple vs. modulating valve types |
| Licensed labour | $95 – $165 per hour | Gas-train work requires a proper leak check afterward |
A gas valve replacement on a boiler that's otherwise sound is generally a straightforward repair that restores full function. Where it's worth pausing is on an older unit that's already had a few unrelated repairs, since spending toward the higher end of this range on a single part is a reasonable moment to ask for a side-by-side comparison against putting that money toward a new boiler instead.
Gas fitting work anywhere in the province, including Port Moody, has to be done by a technician licensed through Technical Safety BC, separate from any building permit the City of Port Moody's building department might require for related mechanical work. Every leak check on a gas valve swap is done to that standard regardless of which municipality the home sits in.
Safety note
Gas valve work involves the appliance's primary gas safety shutoff and must be performed by a Technical Safety BC licensed gas fitter, including a proper leak check afterward; CANRO holds gas licence LGA0043870 and boiler licence LBP0046450. If you smell gas at any point, leave the home immediately and call FortisBC's emergency line at 1-800-663-9911.
Gas valves range from a basic on-off switch to a fully modulating valve with built-in electronics, and those two types cost very differently.
By testing whether the correct voltage actually reaches the valve and whether its internal coil resistance matches spec before condemning the part.
No, an intermittently failing gas valve should be diagnosed and addressed promptly rather than run while waiting to see if it gets worse.
Yes, the gas supply to that valve is isolated during the swap and a leak check is performed before the boiler is put back into service.
Not usually on its own, though on an older unit with other repair history it's worth discussing the boiler's overall condition at the same time.
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