Boiler repair in Toronto and the GTA

Most boiler calls come down to a few faults: trapped air, pressure problems, a failed circulator pump or zone valve, scale in the heat exchanger, or an ignition fault. Here is what each symptom usually means and how it gets fixed.

Radiator repair usually means fixing the system around the radiators: bleeding trapped air, freeing a seized valve, replacing a leaking valve or balancing the flow so every room heats evenly. Cast iron radiators rarely wear out, which is why so many century homes in Toronto still rely on them.

Houses in the Annex, Riverdale and Cabbagetown often have radiators that have outlasted several boilers. When rooms at the end of the run stay cool, we check the circulator, piping and valve settings first.

Every visit for boiler repair in Toronto follows the same steps: a two-hour arrival window, a text when the technician is on the way, a diagnosis and a flat-rate price. Nothing is repaired until you approve it, and most repairs are done that visit when the part is on the truck.

• Tell us what’s happening by phone or form, including noises or fault codes
• A real person calls back and books your arrival window
• The technician checks pressure, pumps, zone valves, the expansion tank, ignition, controls and venting
• You approve a flat-rate price, then we repair, bleed and balance the system
• Every repair comes with our written workmanship warranty

Repair makes sense when the boiler is sound and the fault is a pump, valve or control. Boiler replacement makes sense when the heat exchanger leaks, parts are no longer made, or an old low-efficiency unit needs a major repair. We show you both prices side by side and say which we’d choose.

Good boiler installation in Toronto starts with a heat-loss calculation and a look at your radiators, not the size of the old boiler. Many older boilers were oversized, and a unit matched to the real heat loss runs steadier cycles, uses less gas and lasts longer.

We measure the radiators or floor loops, check the venting and update the near-boiler piping. Condensing boilers work with existing radiators in most homes, so a boiler replacement rarely means opening walls. A modulating boiler with outdoor reset adjusts its water temperature to the weather, saving gas on milder days.

A combi boiler heats your home and your tap water in one wall-hung unit with no tank. A system boiler handles heating only and pairs with a separate indirect hot water tank. Combis suit homes with one or two bathrooms, while larger homes with several showers often do better with a system boiler.

In tight Toronto basements, a combi boiler often frees up real floor space by replacing the water heater.

Hydronic heating moves hot water from a boiler through radiators, baseboard convectors or tubing in the floor. Radiant floor heating runs at much lower water temperatures than radiators, which suits a condensing boiler, since it runs most efficiently when the returning water is cool.

We service in-floor manifolds, mixing valves, zone pumps and controls. A cold patch of floor usually means air in a loop, a failed pump or actuator, or a mixing valve set too low.

Hydronic homes rarely have ducts for central air, so ductless heat pumps are the usual way to add cooling, and they heat too.

Condensing boilers are rated 90% AFUE or higher because they pull extra heat out of the exhaust, so less of your gas goes up the flue. Older non-condensing boilers lose far more heat up the chimney, which is why replacing one usually lowers gas bills.

A condensing boiler vents through plastic pipe out a side wall and needs a drain for its acidic condensate. If the old boiler shared a chimney with a gas water heater, the water heater may need a liner or new venting, and we include that in the quote.

A gas boiler is safe when it burns cleanly, vents properly and its safety devices work. Ontario requires carbon monoxide alarms in homes with fuel-burning appliances, so a home with a gas boiler needs working CO alarms near the sleeping areas, as the province’s carbon monoxide safety page (opens in a new tab) explains.

Gas work in Ontario is regulated by the TSSA (opens in a new tab), and all our gas work is done by TSSA-certified gas technicians. Each visit includes a check of combustion, the venting and the pressure relief valve.

In a boiler emergency, safety comes first: leave the house if you smell gas, get outside if a CO alarm sounds, and turn the boiler off if the relief valve is discharging. Then call us. No-heat emergencies are answered 24/7, even in a Toronto cold snap.

• Gas smell: leave without flipping switches and call Enbridge Gas at 1-866-763-5427 from outside
• CO alarm: get everyone outside and call 911
• Relief valve discharging, a gauge in the red or a leak: switch the boiler off and call us
• No heat and no warning signs: check the thermostat, power switch and pressure, then try one reset

Or request a repair online and we’ll call you back.

The cost of boiler repair in Toronto depends on the part that failed, the boiler type, how easy the parts are to get, and whether the system needs flushing afterwards. We tell you the diagnostic fee on the phone, then give you a flat-rate price before any work starts.

The price you approve is the price you pay. It doesn’t change halfway through.

A yearly boiler service before the heating season cleans the heat exchanger and burner, checks combustion, tests the relief valve and expansion tank, and confirms the venting is safe. It catches worn parts before they fail on the coldest night and keeps a condensing boiler running efficiently.

Our maintenance plan builds that yearly check into your schedule, with a reminder before each visit and priority booking when it’s busy.