Boiler Leaking From the Pressure Relief Valve — Causes Licensed CANRO technicians, same-day service across Metro Vancouver. Call (604) 359-1081.
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A boiler relief valve that drips is doing its job — relieving excess pressure — but the cause behind it needs fixing. A leaking boiler is one of the most common heating calls we get in Metro Vancouver. Because a boiler is a sealed, pressurized water system, even a small drip can drop system pressure, cause no-heat, and lead to water damage if it is ignored. Our Red Seal technicians have kept Metro Vancouver homes warm and dry since 1999 — call (604) 359-1081 for same-day help.
Most boiler leaks trace back to one of these causes:
A boiler that is leaking fast, losing pressure, and producing no heat needs urgent attention — especially in winter. If you smell gas or see scalding water/steam, treat it as an emergency: leave gas alone, keep clear, and call us. Dropping pressure with a running boiler can damage the unit.
CANRO pressure-tests the system, checks the expansion tank charge and relief valve, inspects the circulator, fittings, air vents and fill valve, and on combi units evaluates the heat exchanger. We repair the source, re-pressurize correctly, bleed air, and confirm a clean heating cycle.
Relief valves, air vents and fill valves are typically $150–$400. A circulator pump runs about $400–$800, and an expansion tank $250–$500. A failed heat exchanger is major — we will give you honest repair-vs-replace numbers. Every job starts with a clear, upfront price — no surprises.
CANRO covers Vancouver, Burnaby, Surrey, Richmond, Coquitlam, North & West Vancouver, New Westminster, the Tri-Cities, Delta, Langley and beyond. Call (604) 359-1081 or request a free quote and we will get a licensed technician to you fast.
A persistent pressure drop usually means an active leak (a fitting, the relief valve, or the expansion tank) or a waterlogged expansion tank. It should be diagnosed rather than just topped up.
If it is leaking quickly, losing pressure, or leaving you with no heat in winter, yes — call for same-day service. Small weeps still need prompt repair before they grow.
Most leaks — valves, vents, pumps, fittings — are straightforward repairs. Only a corroded or cracked heat exchanger usually pushes toward replacement, and we will tell you honestly.
Related help from CANRO:
“Canro does an amazing job! Super professional and skilled with everything—boilers, furnaces, and AC. Always a pleasure working with them!”
“Five stars for Canro. We needed a replacement of a 30-year-old boiler. A new high-efficiency unit was installed—clean, professional work.”
“I can’t speak highly enough about George, who was recommended for a boiler service call for my parents’ home. George is excellent.”
25+ years keeping Metro Vancouver homes comfortable. Honest advice, upfront pricing, work that lasts.