Our technicians are trained and certified to repair ductless heat pump systems from every major manufacturer, including:

• Lennox
• Daikin
• Bosch
• GREE
• American Standard
• Mitsubishi
• Fujitsu
• LG
• Samsung
• Carrier
• And most other residential and light commercial mini-split brands

Whether we installed your system or not, we'll repair it. Our technicians carry a full inventory of common parts for the most popular brands, which means fewer return visits and faster resolutions.

Not every issue is a full breakdown. Some warning signs are subtle, but catching them early can prevent a minor problem from becoming a costly failure. Call us if you notice any of the following:

No Heating or Cooling

If your indoor unit is running but your room isn't reaching the set temperature — or the system isn't producing any conditioned air at all — there may be a refrigerant issue, a failed compressor, a sensor fault, or a problem with the reversing valve that switches the system between heating and cooling modes. This is one of the most common complaints we receive and has several possible causes, all of which our technicians can diagnose quickly.

System Won't Turn On

If the unit doesn't respond to your remote or wall controller, the problem could be as simple as a tripped circuit breaker or a drained remote battery — or it could indicate a failed control board, a blown fuse inside the unit, or a communication error between the indoor and outdoor units. Don't assume the worst until a technician has taken a look.

Ice Buildup on the Indoor or Outdoor Unit

Some frost on the outdoor unit during cold weather is normal — heat pumps go through a brief defrost cycle to clear this automatically. However, heavy ice buildup that doesn't clear, or ice forming on the indoor air handler, is not normal. It typically points to a refrigerant leak, a dirty filter restricting airflow, a failed defrost sensor, or a blocked outdoor coil. Left unaddressed, ice buildup can damage the compressor — the most expensive component in the system.

Water Leaking from the Indoor Unit

A small amount of condensation is normal, but water dripping or pooling beneath your indoor air handler indicates a problem. The most common cause is a blocked or frozen condensate drain line. Other causes include a tilted unit that prevents proper drainage, a cracked drain pan, or in some cases a refrigerant issue causing excess condensation. This should be addressed promptly to prevent water damage to walls, flooring, and ceilings.

Unusual Noises

A properly functioning ductless heat pump is nearly silent. If you're hearing sounds you haven't heard before, pay attention to what kind they are:

• Banging or clanking: Often indicates a loose or broken component inside the outdoor unit — possibly a fan blade, mounting bracket, or internal part.
• Squealing or grinding: Usually points to a worn fan motor bearing in either the indoor or outdoor unit.
• Clicking that doesn't stop: Repeated clicking at startup or during operation can signal a failing relay or control board.
• Hissing or bubbling: These sounds often accompany a refrigerant leak — a serious issue that requires immediate attention from a certified technician.

Bad Odours

A musty or mouldy smell coming from the indoor unit usually means mould or mildew has developed on the indoor coil or inside the air handler — common when filters haven't been cleaned regularly or when the unit has been sitting unused. A burning smell can indicate an electrical issue and should prompt an immediate shutdown of the system and a service call. A chemical or sweet smell may point to a refrigerant leak.

Error Codes on the Display

Most modern ductless heat pump systems display error codes when they detect a fault. These codes vary by brand and model but are designed to help technicians diagnose the problem quickly. If your unit is displaying a flashing light pattern or an error code, note what it shows and call us — our technicians know how to interpret these codes across all major brands.

Short Cycling

Short cycling is when the system turns on and off repeatedly in short intervals without ever reaching the set temperature. This strains the compressor, wastes energy, and leaves your home uncomfortable. It can be caused by an oversized system, a refrigerant issue, a faulty thermostat or sensor, or restricted airflow.

Higher Than Normal Energy Bills

If your hydro bills have crept up without a corresponding change in usage habits, your heat pump may be losing efficiency. A refrigerant leak, dirty coils, a failing compressor, or degraded components can all cause the system to work harder — and consume more electricity — to deliver the same level of comfort.

Our technicians handle the full range of ductless heat pump repairs, including:

• Refrigerant leak detection and recharge: We locate the leak, repair it at the source, and recharge the system to the manufacturer's specified level. Note that simply adding refrigerant without finding and fixing the leak is not a proper repair.
• Compressor repair and replacement: The compressor is the heart of the system. When it fails, we assess whether repair or replacement is the more economical path and present you with honest options.
• Fan motor replacement: Indoor and outdoor fan motors can wear out over time. Replacing a failed fan motor restores proper airflow and prevents cascading damage to other components.
• Control board replacement: The control board manages all system functions. A faulty board can cause a wide range of erratic behaviours — from failure to start to incorrect temperature readings.
• Reversing valve repair or replacement: The reversing valve is what allows the system to switch between heating and cooling. A stuck or failed reversing valve leaves the system locked in one mode.
• Condensate drain cleaning and repair: We clear blocked drain lines, repair cracked drain pans, and restore proper drainage to prevent water damage.
• Sensor and thermistor replacement: Temperature sensors that give inaccurate readings cause the system to behave erratically. Replacing faulty sensors restores accurate temperature control.
• Capacitor and contactor replacement: These electrical components are common wear items in the outdoor unit and are typically quick, affordable repairs.
• Coil cleaning: Dirty evaporator or condenser coils reduce heat transfer efficiency and can cause icing or overheating. Professional coil cleaning restores system performance.
• Electrical fault diagnosis and repair: From blown fuses to failed wiring connections, our licensed technicians handle all electrical repairs safely and to code.

When you call Constant Home Comfort for emergency heat pump repair, here's what you can expect:

1. Call us anytime — day or night: Our dispatch team is available 24 hours a day, 7 days a week, 365 days a year, including holidays. We'll take your call, gather details about the issue, and get a technician dispatched to you.

2. Fast response across Ontario: We serve Toronto, the GTA, Hamilton, Ottawa, London, Barrie, Waterloo, Burlington, and all surrounding areas. Our technicians are strategically located across the province for the fastest possible response times.

3. Accurate diagnosis on the first visit: Our technicians arrive equipped with professional diagnostic tools and a full inventory of common parts. We diagnose the problem correctly the first time — not after multiple return visits.

4. Transparent pricing before any work begins: We explain the diagnosis, walk you through the repair options, and provide upfront pricing. No surprises on your invoice.

5. Quality repair with warranty: All repairs are performed to manufacturer specifications and backed by our workmanship warranty. If a part fails after our repair, we stand behind our work.

Not every breakdown calls for a repair. Sometimes, investing in a repair isn't in your best financial interest — particularly if your system is old, has had recurring issues, or requires a very costly component like a compressor. Here's a general framework to help guide the decision:

• Repair is usually the right choice when: The system is less than 10 years old, the repair cost is less than 50% of the cost of a new system, the system has been reliable with no recurring issues, and the failed component is not the compressor.
• Replacement is worth considering when: The system is 12 to 15+ years old, the repair cost exceeds half the cost of a new installation, the compressor has failed, the system has had multiple breakdowns in a short period, or the system's efficiency rating is significantly below modern standards.

Our technicians will always give you an honest assessment — we'll tell you when a repair makes sense and when it doesn't, and we'll never push you toward an unnecessary replacement. If a new system is recommended, we'll walk you through today's options, available rebates, and financing plans so you can make a fully informed decision.

The most common cause of ductless heat pump breakdowns is lack of maintenance. Dirty filters, blocked coils, low refrigerant, and worn electrical components rarely cause sudden failures — they develop gradually, and a trained technician can spot and address them before they become emergencies.

Constant Home Comfort offers preventive maintenance plans that include annual professional tune-ups, priority emergency service, and discounts on parts and repairs. A maintenance plan is the single most effective way to extend the life of your system, maintain peak efficiency, and avoid the inconvenience and cost of unexpected breakdowns.

Ask us about our maintenance plan options when you call for your repair — many customers enrol after their first service visit.

Constant Home Comfort provides 24/7 ductless heat pump repair across Ontario, including:

• Toronto and all inner-city neighbourhoods
• North York, Etobicoke, and Scarborough
• Vaughan, Richmond Hill, Markham, and Thornhill
• Mississauga, Brampton, and Oakville
• Durham Region — Oshawa, Whitby, Ajax, and Pickering
• Newmarket, Aurora, and King City
• Hamilton and Burlington
• Waterloo Region — Kitchener, Waterloo, and Cambridge
• London and surrounding areas
• Ottawa and Kanata
• Barrie and Simcoe County
• And all communities across Ontario — call us to confirm service availability in your area

How quickly can you respond to an emergency repair call?

Response times vary by location and time of day, but our priority is always to get a technician to you as fast as possible. In most major Ontario cities and GTA communities, we aim to have a technician on-site within a few hours of your call. Our dispatch team will give you an estimated arrival time when you call.

Do you charge extra for after-hours or weekend service calls?

We believe in transparent pricing. Any applicable after-hours or emergency service fees will be communicated clearly when you call — before we dispatch a technician. There are no hidden charges added to your invoice after the fact.

My heat pump is still under warranty. Can you repair it without voiding the coverage?

Yes. Manufacturer warranties require that repairs be performed by a licensed, certified technician using approved parts — but they do not require you to use the original installer. Our certified technicians perform all repairs to manufacturer specifications, and we document our work properly so your warranty remains intact.

Can you repair a ductless heat pump you didn't install?

Absolutely. We repair ductless heat pump systems from all major brands regardless of who originally installed them. As long as the system uses standard refrigerant and components — which all modern residential systems do — our technicians can service it.

My heat pump is displaying an error code. Is this an emergency?

Not necessarily, but it does mean the system has detected a fault and you should call us. Some error codes indicate minor issues like a dirty filter or a temporary sensor glitch. Others point to more serious problems. Our team can often help you interpret the code over the phone and determine whether you need an emergency dispatch or a scheduled next-day visit.

What can I do while waiting for a technician?

While you wait, check that the circuit breaker for your heat pump hasn't tripped and reset it if it has. Check that the remote control has working batteries and that the thermostat is set correctly. Clean or rinse the indoor filter if it's been a while. If the system is making unusual noises or you smell something burning, turn it off at the breaker and leave it off until our technician arrives.

Don't wait for a small problem to become a big one. Whether your system just stopped working, is making a noise you've never heard before, or is showing an error code on the display, our certified technicians are ready to help — 24 hours a day, 7 days a week.

Call us now: 1 (888) 675-5907

Visit: constanthomecomfort.com

Serving Toronto, GTA, Hamilton, Ottawa, London, Barrie, Waterloo, Burlington, and all of Ontario — around the clock.