Furnace Repair Calgary — One Call, Live to a Technician, Any Hour
Furnace repair in Calgary is not a seasonal trade; it is the trade. A house here runs its heating system from Thanksgiving to Easter with a few chinook breaks, the cold snaps hold at −30 °C for days, and the first night of each one is when the tired parts give up. Call (825) 395-7447 and our assistant asks what the furnace is doing and where you are, then transfers you — on the same call — to an independent furnace repair technician from our network who can come tonight and who quotes you directly. You pay nothing to use the line.
The pattern of Calgary furnace repair is the same every year: nothing fails in a mild week, then the arctic air settles in, the burner runs for hours without stopping, and an igniter that has been cracking since March finally goes — the night every furnace repair company from Airdrie to Okotoks is busy. If you are reading this with a cold house, the short version is the number above. If the furnace is still running, this page covers the common furnace problems in the city's high-efficiency gas furnaces, what furnace repair costs across the Calgary area, what to check before anyone drives over, when a repair should become a furnace installation instead, and who may legally open the gas side of the appliance in Alberta.
When to call tonight rather than tomorrow
- You smell gas. Leave the house, call ATCO Gas at 1-800-511-3447 from outside, and read the gas-smell guide before you call anyone else.
- A carbon monoxide alarm has sounded, or anyone at home has a headache and nausea that clears when they step outside. Get out, then call 911.
- The indoor temperature is falling toward single digits, the outside temperature is below −20 °C, or someone in the house is elderly, unwell or very young. Pipes in outside walls freeze before people do.
- There is soot, scorching or a smell of burning plastic around the furnace, or the breaker trips again immediately after you reset it once.
- The furnace is banging on start-up. That is gas pooling before it lights, and it gets worse, not better.
Any of these: call now. (825) 395-7447
What goes wrong with furnaces in Calgary
It clicks, lights, and quits within seconds
The flame sensor — a thin rod that proves to the control board there is a flame — has a film of oxide on it, so the board shuts the gas off to be safe.
- Chinook weeks make it worse: short warm-afternoon runs let the film build, and the first cold night the sensor cannot prove anything.
- A clean or a replacement is one of the cheapest furnace repairs in the trade.
It hums but never lights
A hot-surface igniter that has cracked — they are brittle, they age, and they fail on the night the burner is asked to cycle forty times.
- If you hear the inducer fan spin up and then nothing, this is the first thing a technician checks.
It runs, then shuts down on a cold morning
Two Calgary-specific versions, both of which look like a dead furnace and both quick once found:
- Iced vent. High-efficiency furnaces vent through the wall, and at −30 °C the exhaust moisture can ice the termination shut; the pressure switch then refuses to let the furnace fire.
- Frozen condensate. The same furnaces make litres of acidic condensate a day, and a drain line through an unheated corner freezes solid, backing water up until a float switch stops everything.
Warm air at first, then cold, then a restart
The limit switch is opening because the furnace is overheating, and it is overheating because air cannot get through it.
- A furnace filter blocked with renovation dust, a blower that has slowed, or too many closed registers upstairs.
- The furnace protects itself by shutting the burner off and running the fan until it cools.
- Change the air filter first; it fixes a surprising share of these furnace problems without a technician.
The fan runs constantly and the house is cold
Either the thermostat fan setting has been knocked from “auto” to “on”, or the furnace has locked out after repeated failed ignitions and is running the blower for safety.
- Set the fan to auto; if it still runs cold, the furnace has locked out and needs to be looked at.
The house is warm, the bill is not
A furnace running far more hours than the weather explains, with energy bills climbing to match.
- A slipping blower, a dirty secondary heat exchanger in a condensing unit, or ductwork in an older bungalow never sized for the new furnace that replaced the original.
- Worth a furnace maintenance visit before it becomes a breakdown — and worth asking whether the heating system is simply at the end of its life.
Before the HVAC technician arrives
- Thermostat: set to heat, set above the room temperature, and the fan set to auto. Replace its batteries if it has them.
- The furnace switch — it looks like a light switch on the wall by the furnace or on its side — is on. In older basements it is at the top of the stairs and gets flipped by mistake.
- The circuit breaker for the furnace has not tripped. Reset it once. If it trips again, stop and call.
- The furnace filter. Pull it and hold it to a light; if you cannot see light through it, put in a new one before you call anyone — a blocked filter is the commonest cause of a furnace blowing cold air.
- Outside: the white PVC intake and exhaust pipes on the wall are not blocked by snow, ice or a drift from the roof. Clear them by hand, never with hot water.
- Note what the furnace does when it tries to start — whether you hear a fan, a click, a whoomp, or nothing — and what the thermostat is reading. That is most of the diagnosis.
Furnace repair cost in Calgary
We do not set prices. The technician you are connected to quotes you before starting, and you pay them, not us. These are the published Calgary-area ranges, so the number you hear on the call has some context; the notes say what moves a job from the bottom of a band to the top.
| Job | Typical Calgary-area range | Notes |
|---|---|---|
| Diagnostic visit, business hours | $89–$150 | Most companies credit it toward the repair if you approve the work the same visit. |
| After-hours or emergency call-out | $150–$300 | Overnight, weekend and holiday rates commonly run 25–100% above standard. |
| Igniter, flame sensor or capacitor | $150–$350 | The most common no-heat causes, and the cheapest to put right. |
| Control board or gas valve | $300–$900 | The part alone is often $200–$600 before labour, and a gas valve needs a certified gasfitter. |
| Blower motor | $400–$800 | More disassembly, and a variable-speed ECM motor sits at the top of the range. |
| Cracked heat exchanger | $800–$1,500+ | Usually replaced rather than repaired — see below. Furnace replacement in Calgary runs roughly $4,500–$9,000. |
The part
The furnace repair cost table above is mostly a table of parts.
- An igniter, a sensor or a capacitor: a short visit and an inexpensive part.
- A control board, a gas valve, an inducer motor or a blower motor: a different order of cost, partly for the part and partly because the furnace has to come apart to reach it.
The hour
Evening, weekend and holiday visits commonly run 25–100% above a weekday rate in Calgary.
- If the house is holding above 15 °C and nothing smells of gas, waiting for the morning usually costs less, and a fair technician will say so on the phone.
Where you are in the Calgary area
Travel is real money on an after-hours call, which is why the same repair does not cost the same in the northwest and in Okotoks.
- A technician already working in your quadrant quotes differently from one crossing the city on Deerfoot at midnight.
- It is also why the assistant confirms your postal code before connecting anyone.
The furnace's age
Parts for a fifteen-year-old furnace are pricier and slower to get, and each repair on an old unit is money you will not get back when it is replaced.
- Past fifteen winters, with a repair over about a third of a new furnace, most technicians will tell you to stop repairing and start pricing a furnace installation.
- In Calgary, where a furnace runs eight months a year, fifteen is a full life.
What happens when you call about furnace repair in Calgary
Our assistant answers within a minute, asks four things, and transfers you on the same call to a technician from our network who is available now. There is no callback to wait for. From there it is between you and them: they diagnose, quote in writing, do the work and bill you at their rate. hvaclines.ca takes no payment from you. If nobody in the network can take the job at that moment, the assistant tells you so on the call — in a January cold snap an honest no is worth more than a promise.
- What the furnace is doing, and whether it is gas or electric.
- Your postal code, and whether it is a home or a business.
- Have ready: the furnace's make and rough age (the label inside the front panel), what it does when it tries to start, and what the thermostat reads — those three things settle most furnace repair calls before anyone is in the truck.
Emergency furnace repair in Calgary: nights, weekends and cold snaps
Emergency furnace repair is most of what this line handles between November and March: the number is answered every hour of every night, the network includes technicians who work after-hours shifts through the cold snaps, and the assistant asks how cold the house is before connecting you to one who can come tonight. What makes a furnace failure an emergency is not the furnace — it is the outside temperature, the plumbing in the exterior walls, and who is in the house. Either way you should hear the after-hours rate before anyone drives.
- Call tonight when the outdoor temperature is below −20 °C, the indoor temperature has dropped below about 15 °C and is still falling, there is plumbing in an outside wall, or anyone at home is elderly, unwell or very young.
- Call tonight, from outside, for a gas smell — ATCO Gas at 1-800-511-3447 first — and for a carbon monoxide alarm (911). Neither is a furnace repair call until the house is declared safe.
- Morning is fine when the house is above 15 °C in a mild spell, the furnace is short cycling but still heating, or the fault is noise, a weak airflow or a rising gas bill. Most companies charge $150–$300 to attend after hours; a weekday diagnostic is closer to $89–$150.
- While you wait: run the four checks above (thermostat, furnace switch, circuit breaker, furnace filter), clear the outdoor vents, keep taps on a trickle in rooms with outside-wall plumbing, and close doors to unused rooms. A couple of electric space heaters on separate circuits hold a room; a barbecue or patio heater indoors is never an option.
Furnace maintenance, and the point where repair stops making sense
Most of the furnace problems on this page are found on a September annual maintenance visit before they become a January emergency; the other honest conversation is the last repair, and the technician you are connected to does both and quotes both, so ask for the two numbers side by side.
- What a tune-up catches: a filmed sensor, a weakening igniter, a capacitor reading low, a furnace filter unchanged since the renovation, a condensate trap half full of sludge. The furnace maintenance guide says what a real tune-up includes and why the warranty depends on it.
- When repair stops making sense: a furnace past fifteen winters with a repair quote over about a third of a new furnace is a furnace installation conversation, and a cracked heat exchanger is not a repair at all.
Who may work on a furnace in Alberta
Everything on the gas side of a furnace — the valve, the burners, the venting, the gas line — and the electrical wiring tied to safe operation must be done by someone holding an Alberta gasfitter certificate, Class B or Class A, and companies also need a City of Calgary business licence to operate. A furnace replacement in Calgary requires a gas permit, pulled by the certified gasfitter doing the work, and an inspection. None of that is red tape: badly done gas work is how carbon monoxide gets into a house. Every contractor in our network agrees in writing to hold the licences and insurance Alberta requires; we do not verify each ticket ourselves, so ask.
- Refrigerant is a separate ticket. A heat pump or air conditioner that shares the furnace's blower needs a technician with a federal ODS certificate for anything that opens the refrigerant circuit; a dual-fuel system worked on in one visit needs both.
- Ask to see the certificate number before the panel comes off. A tradesperson doing furnace repair in Calgary legitimately has it on their phone and will not mind the question — it is the fastest way to tell a certified gasfitter from someone with a van and a toolbox.
Questions about furnace repair
How much does furnace repair cost in Calgary?
Most furnace repairs land between $150 and $900, depending on the part. A diagnostic visit in business hours runs about $89–$150 and is usually credited if you approve the work; igniters and sensors sit at the low end, blower motors and control boards at the high end. We do not set these prices — the technician quotes you before starting.
Can I get someone out at night or on a weekend in Calgary?
Yes; the line is answered around the clock and the network includes technicians who work nights. Expect an after-hours premium — many companies charge $150–$300 just to attend, with rates 25–100% above a weekday. If the house is above 15 °C and nothing smells of gas, morning is usually cheaper.
Why does my furnace fail on the coldest night of the year?
Because that is the first night it runs for hours without a rest. A cracked igniter, a filmed sensor or a weak capacitor survives forty short cycles a day in November and fails on the four-hundredth in a −30 °C snap. Outdoor vents icing shut and condensate lines freezing add two more furnace problems that only appear in deep cold — which is why a September furnace tune-up is the cheapest furnace repair there is.
Is it worth repairing a furnace that is fifteen years old?
Sometimes. The rule most technicians use: if the repair costs more than about a third of a new furnace and the furnace is past fifteen, replace. In Calgary, where a furnace runs eight months a year, fifteen winters is a full working life, and a new high-efficiency heating system cuts gas use and energy bills noticeably. A cracked heat exchanger ends the debate on its own.
Can I run space heaters until someone comes?
A couple of electric heaters on separate circuits will hold a room, not a house, and they trip breakers in older homes. Keep taps on a trickle in rooms with outside-wall plumbing, close doors to unused rooms, and open the cabinet under the kitchen sink if it is on an exterior wall. Never use a barbecue, camp stove or patio heater indoors.
Do you repair furnaces yourselves?
No. hvaclines.ca is a live call-connection service run by PatchLead. We confirm the problem and where you are, then connect you on the same call to an independent Calgary furnace repair technician from our network who does the work and quotes you directly. You pay nothing to use the service, and the technician's company bills you for the repair.