Boiler Repair, Service & Installation in Kawartha Lakes, ON
Boiler not heating in a century home in Lindsay, a propane combi locking out at a Sturgeon Lake cottage, or in-floor heat gone cold in a Bobcaygeon bungalow — our TSSA-certified technicians handle boiler repair, annual boiler service, boiler replacement, and combi boiler installation across Kawartha Lakes. Natural gas, propane, and oil-to-gas conversions, with 24/7 no-heat response in winter.
Boiler Repair Kawartha Lakes Homes and Cottages Can Count On
Boilers are a minority of heating systems in Kawartha Lakes — which is exactly why so few local companies know them well. The ones that are here are a mixed bag: cast-iron radiator boilers in century homes around Lindsay and Omemee, propane combis in newer builds and cottages past the gas main, in-floor radiant heat in bungalows on Pigeon and Sturgeon Lake, and a surprising number of old oil-fired boilers on farms near Woodville and Little Britain still waiting for a conversion. Most of them run on propane, most fill from hard well water, and most sit in homes that lose power a few times every winter.
UltraStream Plumbing Services Kawartha Lakes provides boiler repair, annual boiler service, boiler replacement, and combi boiler installation across the city, from a Lindsay semi on natural gas to a Balsam Lake cottage on propane. Every gas and propane boiler is worked on by a TSSA-certified technician holding a G2 or G1 licence — Ontario law requires it, and we won't send anyone to a boiler without one. If your hot water comes from a standalone tank rather than the boiler, that's our water heater repair and installation page; everything that heats the house is here.
Boiler not heating, dropping pressure, or locking out on an error code? Call (705) 230-7871 — same-day boiler service across Kawartha Lakes, 24/7 for no heat in winter.
Boiler Not Heating, Losing Pressure or Locking Out? What We Fix
Half of the "boiler" faults we're called to are actually in the loop around it — the pump, the expansion tank, the zone valves, or air in the lines. That's why our hydronic heating repair starts with the whole system, not just the box on the wall. Parts for the common failures ride on the truck:
- No heat or repeated lockouts: ignition failure, a dirty flame sensor, a failed gas valve, or a tripped high-limit. On propane units past the gas main, low tank pressure or a frozen regulator in a cold snap is a common cause we check first.
- Pressure dropping or spiking: a boiler that needs topping up every week has a leak or a waterlogged expansion tank; one that climbs past 25 psi and dumps from the relief valve has a failed fill valve or a tank that's lost its charge.
- Cold radiators or one cold zone: air in the loop, a stuck zone valve, or a circulator pump that's quit. In a 1900s Lindsay house with 14 radiators, it's often one valve stuck shut for a decade.
- Kettling, banging and gurgling: scale on the heat exchanger from hard well fill water, or air that was never purged. We flush the system, add a magnetic filter, and — where it keeps coming back — treat the fill water.
- Combi heats the house but not the taps: a failed diverter valve, a scaled plate heat exchanger, or a flow sensor — all repairable on the spot without replacing the boiler.
- Condensate and venting faults: a frozen or blocked condensate line will shut a high-efficiency boiler down on the coldest night of the year — a ten-minute fix we see every January.
Boiler running but the house still cold and a tap gone dry? Check the water lines before the boiler — a frozen pipe in the same cold snap is more common than a boiler failure, and we treat both as emergencies.
Boiler Replacement in Kawartha Lakes: Combi Boiler or Conventional?
Most boiler replacement calls end with the same question. The answer depends on how many bathrooms run at once, whether you're on gas or propane, and whether there's a hot water tank to get rid of. We size the new boiler to the home's actual heat loss — not to the label on the 30-year-old unit it's replacing, which is almost always oversized.
Combi Boiler Installation
One wall-hung unit heats the house and the taps. The hot water tank goes, the floor space comes back, and a 95% condensing combi uses noticeably less propane or gas than a cast-iron boiler plus a tank. Our most common boiler installation in Kawartha Lakes. The right fit when:
- 1 Two or three bathrooms, not all running at once.
- 2 You're on propane and want one appliance to feed, not two.
- 3 The old boiler and the hot water tank are both due — a combi replaces them in one job.
On hard well water we add scale protection on the fill and domestic side — a combi's plate heat exchanger is the first thing scale kills.
Conventional or System Boiler with Indirect Tank
The boiler heats the house and keeps a separate indirect tank hot. More floor space, more hot water in reserve, and the better call for large homes and busy cottages. Still the right choice when:
- Three or more showers at once — a lakefront cottage with twelve guests on the long weekend outruns any combi.
- Large radiant floor areas — a heated garage slab plus a basement plus the main floor wants a boiler sized for heating alone.
- Oil-to-gas or oil-to-propane conversion — swapping an old oil boiler on a farm property, where the existing radiators and piping stay and only the boiler and fuel change.
Both options are priced in writing, side by side, before anything is ordered. Every boiler installation includes removal of the old unit, new venting, a combustion test, and TSSA-compliant gas or propane work.
Radiant Floor Heating & Hydronic Heating Repair
Radiant floors are everywhere in newer Kawartha Lakes builds — heated basements, garage slabs, and whole main floors on PEX loops fed from a manifold. The boiler is only half of that system. We service the manifolds, mixing valves, actuators, and zone controls that most furnace companies won't touch, and we diagnose a cold floor loop by loop, not by guesswork.
Older radiator and baseboard systems in Lindsay, Omemee, and Fenelon Falls need a different skill set: bleeding and balancing cast-iron radiators, replacing seized zone valves and circulator pumps, swapping a waterlogged expansion tank, and tying a new high-efficiency boiler into 90-year-old piping without turning the house into a plumbing project.
Cottages and outbuildings that sit cold for weeks get glycol in the loop so a power outage doesn't become a split pipe, and a low-temperature alarm or Wi-Fi thermostat so you know before the neighbours do. Rural power failures are the number-one reason a Kawartha boiler goes cold — we'll tell you what it takes to run yours off a generator.
Boiler topping-up constantly on a well system? Check the fill side too: a failing well pump or pressure tank can starve the auto-fill valve and show up as a boiler "leak" that isn't one.
Annual Boiler Service in Kawartha Lakes — and What to Do When the Heat Goes Out
Most January boiler emergencies were avoidable in October. A yearly boiler service is the cheapest line on this page and the one that gets a 15-year boiler to 25 — book it in September or October, before the first cold week fills the schedule. And when the heat does go out at −25 °C, the first three steps are yours:
Step 1 — Check your CO detector
If it's alarming, or anyone has a headache, nausea, or dizziness, get everyone outside and call 911 before you call us. A boiler that has stopped firing can still be venting badly.
Step 2 — Note the code and pressure
Read the error code and the gauge (12–15 psi cold is normal). Check the propane tank gauge and the breaker. Don't keep resetting the boiler — repeat lockouts mask the real fault.
Step 3 — Protect the pipes, then call
Open cabinet doors on exterior walls, let a tap trickle, and call us. No-heat calls in winter are dispatched 24/7 — if a line has already frozen, our frozen pipe repair team comes on the same truck.
Why choose UltraStream Plumbing Services Kawartha Lakes for your boiler? Because we work on the wells and pressure tanks that fill it, the hot water tanks that sit beside it, and the frozen lines that follow when it fails — not just the boiler. Every boiler service includes a combustion analysis and CO test, burner and flame sensor cleaning, heat exchanger inspection, pressure, expansion tank and relief valve checks, bleeding and balancing the loops, and a written report under our G2/G1 technician's licence.
No heat, a boiler that keeps locking out, or a 25-year-old unit on its last winter? Call (705) 230-7871 for boiler repair, service, or replacement anywhere in Kawartha Lakes.
Book Your Boiler Service
Tell us the symptom or error code and your boiler type — combi, conventional, radiant floor — and whether it's on natural gas or propane. No heat right now in winter? Check your CO detector, then call (705) 230-7871 instead; it's faster.
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Boiler Repair, Service & Installation Questions in Kawartha Lakes
Answers for homeowners and cottage owners dealing with a boiler not heating, a lockout code, a cold radiant floor zone, or a 25-year-old boiler that's due for replacement in Lindsay, Bobcaygeon, Fenelon Falls, Omemee, and nearby communities.
My boiler is not heating — is that a 24/7 emergency in Kawartha Lakes?
In winter, yes. A boiler not heating at −25 °C turns into frozen pipes within hours, so we dispatch a TSSA-certified technician for emergency boiler repair day or night, from Lindsay to the lake roads around Coboconk. Before you call: check your CO detector — if it's alarming or anyone feels unwell, leave the house and call 911 first. Then note the error code, the pressure gauge reading, and on propane, the tank gauge, and call us. Don't keep resetting the boiler; repeat lockouts mask the real fault.
Who can do boiler repair and installation in Ontario — do you need a TSSA licence?
Yes. Anyone working on a natural gas or propane boiler in Ontario must hold a TSSA gas technician certificate — G2 for residential boilers, G1 for larger inputs. Every boiler repair, boiler service, and boiler installation we do in Kawartha Lakes is by a G2 or G1 technician, and the work is recorded under that licence. That matters on propane, which is most of the county: if a company can't show the certificate, don't let them touch the boiler, and your insurer may ask for it after a claim.
Combi boiler installation or a conventional boiler — which is right for a Kawartha Lakes home?
For most two- or three-bathroom homes, especially on propane, a combi boiler installation is the better fit: one wall-hung unit heats the house and the taps, the hot water tank goes, and a condensing combi uses noticeably less fuel than an old cast-iron boiler plus a tank. A large cottage with twelve guests showering in a row, or a home with a heated garage slab plus a full radiant main floor, still does better with a conventional or system boiler and an indirect tank. We size the boiler to the home's actual heat loss and price both options side by side.
Is it time for boiler replacement, or can my boiler still be repaired?
Most faults are boiler repairs: igniters, flame sensors, circulator pumps, zone valves, expansion tanks, and combi diverter valves are all parts we carry. Boiler replacement in Kawartha Lakes makes sense when the heat exchanger is cracked or a cast-iron section is leaking, when the unit is 20+ years old and parts are discontinued, when two winters of repairs add up to half a new boiler — or when you're still running an oil boiler on a farm property and want to convert to propane or gas. You get both prices on the same visit and a plain recommendation.
Do you do hydronic heating repair for radiant floors and old radiators?
Yes — hydronic heating repair is a large share of our boiler work in Kawartha Lakes. We service radiant floor manifolds, actuators, and mixing valves in newer builds, and bleed, balance, and re-valve cast-iron radiators in century homes in Lindsay and Omemee. A cold room while the rest of the house is warm is usually air in the loop or a stuck zone valve, not the boiler. For cottages that sit cold, we add glycol to the loop so a rural power outage doesn't split a pipe.
How often does a boiler need servicing, and what does annual boiler service include?
Once a year, ideally in September or October before the first cold week. Our boiler service in Kawartha Lakes includes a combustion analysis and CO test, cleaning the burner, igniter, and flame sensor, inspecting the heat exchanger for scale and cracks, checking gas or propane pressure, venting, and the condensate trap, testing system pressure, the expansion tank, relief valve, and pump, and bleeding and balancing the loops. Hard well fill water scales heat exchangers fast here, so this is the visit that gets a 15-year boiler to 25.
What Kawartha Lakes Homeowners Say About Our Boiler Service
“Boiler quit at −24 on a Friday night in Lindsay. Searched boiler repair near me expecting voicemail — UltraStream picked up. Tech was here within two hours, found a failed igniter, had the radiators warm before he left. Can't ask for more.”
“Two companies in Bobcaygeon told us they 'don't really do boilers.' UltraStream does. Our pressure kept dropping — turned out to be a waterlogged expansion tank, not the boiler. Fixed in an hour, no sales pitch for a new unit.”
“Replaced a 30-year-old oil boiler at our farm near Woodville with a propane combi. Oil tank gone, hot water tank gone, propane bill lower than the oil was. Clean install and the TSSA paperwork handed over without us asking.”
“One zone of the heated floor in our Fenelon Falls bungalow had been cold for two winters. They traced it to a stuck actuator on the manifold — small part, warm floor. The last guy quoted us a new boiler for it.”
“Our combi at the Sturgeon Lake cottage heated the house but made no hot water. Searched boiler service near me, UltraStream came out, replaced a scaled diverter valve, and put a scale filter on the fill because of our well water. Explained everything.”
“Booked an annual boiler service for our century home in Omemee after years of skipping it. Combustion test, cleaned the burner, bled all fourteen radiators, and left a written report with the numbers. Quiet and even heat now. Booking every fall.”