What happens during a boiler service in an older Kerrisdale home?

A boiler service in an older Kerrisdale home typically takes two to three hours and costs between $150 and $300 for a standard annual tune-up, depending on the age of the system and whether any parts need attention.

What a Technician Actually Does

Most Kerrisdale houses with boilers were built between the 1920s and 1960s, and many still run the original cast-iron radiators and copper or steel distribution piping. The technician starts at the boiler itself: inspecting the heat exchanger for cracks or corrosion, checking the burner flame colour and combustion, cleaning the burner assembly and igniter, and testing the gas valve and controls. The flue and venting get checked for blockages, corrosion and proper draft, which matters especially in older homes where the boiler shares a masonry chimney with a gas water heater. A shared chimney that is undersized for a modern condensing boiler is one of the more common surprises in this neighbourhood.

From there the technician moves to the distribution system: checking operating pressure (typically 12 to 18 psi cold), testing the pressure relief valve, inspecting the expansion tank, and bleeding air from radiators that are slow to heat. Older Kerrisdale homes often have zone valves or a single-zone gravity system; the technician will check whichever controls are present and confirm the circulator pump is running quietly and without leaks. Pump bearings are a common wear item on systems that are 20 or more years old.

Combustion gases are tested with an analyser to confirm carbon monoxide levels are within safe limits. The City of Vancouver Fire By-law requires a CO alarm inside each bedroom or within five metres of each bedroom door in any home with a fuel-burning appliance, so if yours are missing or past their expiry date, replace them before the technician leaves. Technical Safety BC recommends annual servicing of all home heating appliances, and a boiler that has not been touched in several years may need a more thorough clean and adjustment than a routine tune-up covers.

The technician should also note the boiler's age and efficiency rating. A cast-iron atmospheric boiler from the 1980s or earlier is likely running at 60 to 70 percent efficiency; a modern condensing boiler can reach 90 to 95 percent. If the unit is approaching the end of its serviceable life, a replacement quote is worth having alongside the service report. Boiler replacement in Metro Vancouver typically runs $8,000 to $18,000, more if distribution work or new zones are involved.

Because this is gas work in the City of Vancouver, the gas permit is issued by the City itself, not Technical Safety BC. Any repair that goes beyond routine maintenance, such as replacing a gas valve, heat exchanger or burner assembly, requires a licensed gas fitter employed by a gas contractor licensed with Technical Safety BC, and the City of Vancouver will issue the permit for that work.

A good question to ask any contractor before booking: "Will you test combustion gases and check the flue draft, or is this a visual inspection only?" The answer tells you quickly whether you are getting a real service or a checkbox visit.

Vancouver HVAC Pro can send your details to local contractors who service older boiler systems in Kerrisdale and across the City of Vancouver, at no cost to you.