Boiler Repair, Replacement and Hydronic Heating Service

A single worn part on a sound boiler is usually worth repairing. Heat exchanger leaks, repeated pump or control failures and parts that are no longer available often point to replacement. We explain both paths before you decide.

It depends on the return water temperature your system needs. Condensing boilers perform well when return water stays low, which suits in-floor heat and larger emitters. We review the radiators and controls before recommending one.

Yes, a hydronic air handler coil can heat air that moves through ductwork, and some homes combine radiant zones with a coil. It needs careful design of water temperature and flow, so we start with a site review.

Once a year before the heating season is the usual interval, and the manufacturer's instructions come first. Service covers combustion, safeties, water level and pressure, circulators and venting.

We handle boilers in light commercial buildings. Larger or specialized plants may need other licensed trade partners, which we confirm at the site review. Related scopes sit under Commercial / Mechanical.

A well-kept cast-iron boiler can run for many years, while modern condensing boilers have more electronics and are more sensitive to water quality and upkeep. Age matters less than condition. Leaks, corrosion, repeated pump or control failures and parts that are no longer available often decide the question. A site review gives you a practical view.

Trapped air is a common cause, and bleeding the radiator at its air vent may help. Other causes include low system pressure, a failed circulator or zone valve, closed valves or sludge in the system. If several radiators are cold or the boiler is locking out, call us rather than bleeding repeatedly.

Normal pressure is shown on the gauge and depends on the system, rising a little when the water is hot. Low pressure suggests a leak or lost water, while high pressure or a dripping relief valve often points to an expansion tank problem or an overfilled system. Do not keep topping up without finding the cause.

A hot water boiler circulates heated water through radiators, baseboard or floor loops. A steam system boils water and sends steam through pipes to the radiators, with different controls, piping and safety needs. Some older Ontario buildings have steam. Tell us what you have, and we confirm at the site review whether the work suits us.

Often yes, since a low-temperature loop can be fed from a boiler through mixing controls. It depends on the floor construction, insulation, heat load and the existing boiler capacity. Many Ontario basements have concrete slabs with little insulation underneath, which affects how the floor performs. A site review sorts this out.

Boilers are regulated fuel-burning equipment in Ontario, larger units can also fall under pressure equipment rules, and permit needs depend on the unit, the fuel and the municipality. Rules differ by municipality and change, so we confirm what applies before work. Kelvin Mechanical works with licensed and qualified professionals and trade partners, depending on the project scope.

Natural gas is common where the utility network reaches, with Enbridge Gas as the main utility. Propane and electric boilers are also used, and some older homes still have oil-fired units. Changing fuels affects venting, supply and storage, so it is a bigger project than a like-for-like swap. We review the fuel supply at the site review.

Generally yes, depending on the model and parts availability. We look at the boiler, controls and piping first, explain what we find and tell you whether a repair makes sense. A diagnostic fee may apply; confirmed at booking. Some scopes need licensed trade partners, which we confirm at the site review. Emergency service is subject to availability.

Confirm the thermostat is set to heat and above room temperature, and that the boiler's power switch and breaker are on. Write down any code on the display and the pressure gauge reading. Do not open the cabinet, bleed radiators repeatedly or keep refilling the system. If you smell gas, leave the home and call your gas utility or 911 from outside; if a carbon monoxide alarm sounds, get everyone outside and call 911. Otherwise call +1 905-407-7353. Emergency service is subject to availability.

The fault, the part, how easily the boiler can be reached, the age of the system and whether parts are still available. We explain what we find and the options before any approved work, and a repair price follows the diagnosis.

A lockout or fault code means the safety controls have stopped the boiler from firing. Check that the thermostat is calling for heat, the power is on and the pressure is within the range marked on the gauge. Reset it once at most, following the manual. If it locks out again, or you smell gas, leave it off and call a registered gas contractor.

Turn off power to the boiler and, if you can do so safely, shut the water supply to the system. Place a container under the leak and keep people away from hot water or steam. Call us promptly, because the cause may be a failed valve, fitting, pump seal or the heat exchanger itself. Emergency service is subject to availability.