Boiler Annual Service and Tune-Up in Greater Vancouver

Hot water heating is quiet, even and long-lived, which is exactly why boilers get forgotten until one stops. ROMA Heating & Cooling services gas boilers throughout Greater Vancouver — cast-iron units on century-old radiator systems in Strathcona and New Westminster, wall-hung condensing and combi boilers in newer townhomes, and everything in between. A yearly service is the single best thing you can do to keep a boiler efficient and safe.

Safety line for every reader: smell gas, leave the building, don’t operate switches, and call FortisBC’s emergency line and 911 from outdoors. If a CO alarm goes off or people feel unwell, get out and call 911.

What does a full boiler service cover?

After the visit the technician explains what they found and leaves written notes. Any repair comes with a flat-rate price in writing before work begins.

Why does system pressure matter so much?

Call a licensed ROMA gas technician — (604) 704-0300

A closed hydronic system should hold a fairly steady pressure. If you find yourself topping it up, water is going somewhere: a weeping relief valve, a leaking radiator valve, a failed expansion tank, or a pinhole somewhere in the piping. Low pressure can lock out modern boilers entirely; high pressure pushes the relief valve to open. We check pressure cold and at temperature, and trace any trend rather than just refilling.

What is magnetite, and doesn’t soft water prevent buildup?

Greater Vancouver has soft water, so mineral buildup is not the issue it is elsewhere. What we do see is magnetite — a black, fine sludge formed as steel and iron components corrode inside the closed loop — plus general sediment in older systems. Sludge settles in radiators, clogs narrow passages in modern heat exchangers, and makes pumps work harder. Signs include cold spots at the bottom of radiators, kettling or rumbling noises, and dark water when a bleed valve is opened. Many systems benefit from a magnetic dirt separator; on heavily contaminated older systems a professional flush may be recommended. Our gas boiler cleaning service explains that work in more detail.

How is servicing a condensing boiler different from an older cast-iron one?

Condensing and combi boilers extract so much heat that the exhaust turns to water, so they have a condensate trap and drain that must stay clear, and their compact heat exchangers are less forgiving of sludge. Their controls and sensors are also more complex. Older cast-iron boilers are simpler and more tolerant but often run on original piping, radiator valves and expansion arrangements that deserve an honest check. Either way, the technician tailors the service to the equipment in front of them rather than running a generic list.

When should you book your boiler’s service?

Late summer and early fall are best, before the heating season starts and before the rush. If you own a combi boiler that also makes your domestic hot water, it works all year, so pick whatever month is easiest and keep to it. Book sooner if you notice:

• Pressure creeping down or needing regular top-ups.
• Water around the relief valve outlet or under the boiler.
• New banging, gurgling or kettling sounds.
• Radiators or floor zones that are slow to warm or stay cold at the bottom.
• The boiler locking out and needing a reset.

What should owners avoid doing themselves?

Bleeding a radiator with the right key is fine if you have done it before and the system pressure is then checked. Opening the boiler casing, adjusting the gas valve, changing controls or working on venting is not owner work. On combi boilers especially, please leave internal components alone.

What will you notice after a good service?

Usually, not much — and that is the point. A boiler that has been cleaned and adjusted tends to light more smoothly, cycle less often, and bring radiators or floors up to temperature more evenly. Pressure holds steady from week to week instead of drifting. On condensing boilers, a clear trap and drain means fewer nuisance lockouts on the first cold morning. You will also have written notes describing the condition of the expansion tank, relief valve and pumps, which makes planning easier: if a circulator is getting noisy or a relief valve is showing its age, you can schedule that work in the off-season rather than discovering it with the house cooling down. Owners of older cast-iron systems often use those notes to decide when a modern condensing boiler starts to make financial sense, and the notes give the next technician a baseline to compare against.

Do strata and multi-unit boilers get the same service?

Larger boilers serving a strata building or rental property follow the same principles with more components: multiple pumps, larger expansion vessels, mixing valves and sometimes several boilers staged together. ROMA can schedule service to suit property managers and provide written notes for council records.

Tell us what you have — the brand, the model, and what it’s doing — and we’ll come back with the honest picture. Give us a call at (604) 704-0300 or schedule your boiler service here.

Learn more about ROMA’s related services.

Frequently Asked Questions

How long does a boiler annual service take?

A residential gas boiler service usually takes a good part of a morning or afternoon, depending on the boiler type, how accessible it is, and whether cleaning of the heat exchanger or condensate trap is needed. Larger multi-zone or strata systems take longer. ROMA will give you an idea of timing when you book.

Why does my Greater Vancouver boiler keep losing pressure?

Common causes include a relief valve that weeps, an expansion tank that has lost its charge, leaking radiator or zone valves, and small leaks in older piping. Topping up only hides the problem and adds fresh oxygenated water that speeds up internal corrosion. A technician should trace where the water is going during the service.

Is sludge a problem even though Vancouver water is soft?

Yes. Soft water means little mineral buildup, but closed-loop systems still form magnetite sludge as internal steel and iron corrode. It collects in radiators, pumps and compact heat exchangers. A service checks for it, and a magnetic filter or a system flush may be recommended depending on what the technician finds.

Does a combi boiler need servicing more often than a heating-only boiler?

Not necessarily more often, but it works all year because it also heats your domestic water, so skipping a year is riskier. An annual service on a combi boiler covers the heating side plus the domestic hot water side and condensate drainage. Pick a regular month and stick with it.

Reviewed by the ROMA Heating & Cooling team — TSBC-licensed gas contractor (Gas LGA0202903), serving Greater Vancouver since 1999. Updated September 2026.