Heat Pump Toronto — Installation, Repair and Cold-Climate Advice
A heat pump in Toronto is an air conditioner that runs in reverse: it cools your house in summer and moves heat indoors in winter, even from cold outdoor air. For most Toronto and GTA homeowners, it works alongside an existing gas furnace that takes over on the coldest nights, which is why heat pumps are now one of the most common home energy upgrades here.
If you already have a heat pump that has stopped, are comparing a new install, or need cold-climate guidance before winter, this page helps you understand how heat pumps work, what common problems and emergency checks to look at first, how they pair with furnaces, what affects cost, which types make sense in Ontario, what rebates and licensing matter, and how to reach a local certified technician fast.
Call us and our assistant confirms whether you have a heat pump that has stopped or are looking to install one, and your postal code, then connects you live to a technician who is available now. A planned installation can go through the online request instead.
When it can’t wait
- There is no heat from either the heat pump or the backup furnace and it is below freezing.
- The outdoor unit is encased in ice rather than lightly frosted, and the defrost cycle is not clearing it.
- The unit trips its breaker every time it starts.
- There is a burning smell or a loud grinding from the outdoor unit.
Any of these: call now. (437) 523-7774
Common heat pump problems
Not heating in cold weather
A heat pump loses capacity as the temperature drops, which is normal and why it has a backup. If the backup is not engaging, the fault is usually in the controls or the outdoor sensor rather than in the heat pump itself.
Iced-up outdoor unit
Light frost is normal in winter and the unit clears it on a defrost cycle every so often. Today’s heat pumps are built to keep working in the cold temperatures typical of Toronto winters. A solid block of ice is not, and points at a failed defrost control, a stuck reversing valve or low refrigerant. Annual service can catch small issues before they turn into costly repairs. Reduced output in extreme cold is normal during harsh winters, which is why some homes still rely on backup heat, but heavy icing still points to a controls or outdoor sensor fault.
Blowing cool air in heating mode
Heat pump air comes out cooler than furnace air, around body temperature, and people often report this as a fault when it is normal. If it is genuinely cold, the reversing valve or the refrigerant charge is the suspect.
Running constantly
Also often normal: heat pumps are designed to run long and low rather than in short bursts. Constant running with the house not reaching temperature is a different matter and needs looking at.
Short cycling or noisy defrost
A whoosh and a brief blast of cooler air during defrost is expected. Banging, or cycles every few minutes, is not.
Before the HVAC technician arrives
- Check the thermostat is in heat mode, not emergency heat, unless you have deliberately set it there.
- Look at the outdoor unit. Light frost is fine; a solid casing of ice is not. Do not chip at it, and never pour hot water over the coil.
- Clear snow and ice away from around and above the unit so it can breathe and drain.
- Check both breakers, indoor and outdoor. Reset once; if it trips again, leave it off and say so.
- Note whether the backup furnace is running at all, and have the make and model of both units ready.
What affects the cost
We do not quote prices; the HVAC technician you are connected to does, before the work starts. These are the things that move the number.
Cold-climate rating and energy efficiency
A cold-climate heat pump holds useful capacity far below freezing and costs more than a standard one. In Toronto it is usually the right choice because an air source heat pump moves heat energy instead of creating it, which makes it energy efficient and often cost effective: modern cold-climate units can operate at efficiencies of 200% to 400% under the right conditions, which cuts electricity consumption, can lower energy bills, and is why high efficiency heat pumps often mean lower energy bills over time. Compared with traditional systems, it can also reduce carbon emissions, changes how often the gas backup runs, and saves money on operating cost; for added context, a 20 SEER heat pump is 53% more efficient than a 13 SEER AC.
How heat pump installation integrates with your furnace
A dual-fuel setup needs controls that decide when to switch between the heat pump and the furnace based on your existing heating system, which is why hybrid systems planning needs to account for electrical requirements and equipment compatibility. Many homeowners choose a heat pump paired with a gas furnace for extreme cold. Getting that switchover point right is most of what determines whether you actually save money, with savings often strongest until outdoor temperatures fall to roughly 2°C to 4°C, after which the switchover setting matters more. Moving more of the load from a natural gas furnace to an electric heat pump also reduces on-site fossil fuel use. A proper heat-loss calculation is recommended to size the heat pump accurately before setting the switchover point.
Rebates and incentives
Federal and provincial programs can offer rebates and financing options for heat pump upgrades, and the paperwork often requires a pre-installation energy audit. Rebate eligibility for energy-efficient systems is usually assessed during the planning process, so homeowners should confirm it before installation starts. Ask before the work is done; afterwards is too late.
Electrical capacity
Older Toronto homes on a 100-amp service may need a panel upgrade, which is a real and sometimes substantial extra cost.
Air-source heat pump or ground-source
These are different machines at different prices. An air-source unit sits outside like an air conditioner and is what most Ontario homes install; that includes ductless heat pumps and other ductless systems, which are often a practical fit for older Toronto homes without central air ducts and can work as efficient heating and cooling systems. A ground-source system uses buried loops, costs several times more to put in, and is only worth considering with the land and the horizon to recover it.
Whether it replaces or supplements the furnace
A hybrid setup keeps the gas furnace for the coldest weeks and runs the heat pump the rest of the year, which is the common Ontario answer. Going all-electric means the heat pump has to carry the design-day load on its own, which usually means a larger unit, possibly an electrical panel upgrade, and a harder look at your insulation first.
What happens when you call about a heat pump
Say up front that it is a heat pump rather than a furnace. For many Ontario homes that are not ready to replace the furnace completely, a hybrid setup is the ideal solution. Not every technician works on them and the diagnostics are different, so it saves a wasted visit — the assistant asks, but volunteering it helps.
Have ready whether it is air-source or ground-source, roughly how old it is, and whether there is a backup heat source. Also useful: whether the fault is in heating, cooling, or both, because a unit that cools fine and will not heat points somewhere quite specific. Homes heated by a boiler, or planning around a water heater, may need a more tailored all-electric design. If you are planning heat pump installation, the cost of installing one is often in a similar range to replacing an air conditioner, depending on the setup, and it can deliver year round comfort without locking you into more money on seasonal equipment swaps.
You are connected on the same call to a technician from our network who is available now. You pay nothing to use the service; they quote you directly.
One question worth asking them directly: at what outdoor temperature does your system hand over to backup heat, and is that changeover set correctly? A changeover point set too high runs expensive resistance heat on days the heat pump could have handled alone, and it is the commonest reason a Toronto hydro bill jumps after an install.
Licensing and safety
Heat pump work means handling refrigerant, which requires federal ODS certification, and falls under Ontario's 313A or 313D trades. A dual-fuel installation also touches the gas furnace and its controls, which requires a TSSA gas certificate. Every contractor in our network agrees in writing to hold the licences and insurance the province requires; ask for the numbers.
If you are claiming a rebate, confirm the contractor is registered under the relevant program before work starts. Many programs will not pay for work done by an unregistered installer, however good the installation.
Questions about heat pump
Does a heat pump actually work in a Toronto winter?
A cold-climate heat pump works well below freezing, and in most Toronto homes it is paired with the existing gas furnace, which takes over on the coldest nights. The heat pump covers the large majority of the heating season; the furnace covers the extremes. That pairing is what makes it practical here.
Why is my heat pump blowing cool air?
Heat pump air is cooler than furnace air, typically around body temperature, so it feels cool on your hand even when it is heating correctly. That is normal. If the house is not warming, or the air is genuinely cold, the reversing valve or the refrigerant charge needs checking.
There is ice on my heat pump. Is that a problem?
Light frost is normal and the unit melts it on a defrost cycle. A solid block of ice is not normal and points at a failed defrost control, a stuck reversing valve or low refrigerant. Clear snow from around the unit, do not chip at the ice, and call.
Will a heat pump lower my bills?
It usually shifts cost from gas to electricity, and whether that is a saving depends on your rates, your insulation and where the switchover to the furnace is set. A good contractor will talk about the switchover point, not just the equipment. Ask what they plan to set it to and why.
Do you install heat pumps yourselves?
No. 2hvac.ca is a live call-connection service run by PatchLead. We confirm what you need and where you are, then connect you on the same call to an independent technician from our network who inspects, quotes and installs. You pay nothing to use the service.