A ducted heat pump carries more responsibility than a ductless unit serving a single zone. It is the sole heating and cooling source for your entire home, distributing conditioned air through every room via your duct system. This means that when something goes wrong — whether it's a developing refrigerant issue, a degrading blower motor bearing, or coils that have lost efficiency from accumulated dirt — every room in your home is affected simultaneously.

The stakes of neglected maintenance are higher with a central system, and so is the payoff from professional servicing. A clean, properly charged, well-calibrated ducted heat pump delivers the same efficiency it was rated for at the time of installation. One that hasn't been serviced in several years may be consuming 20 to 30% more electricity for the same output — a cost that compounds across every heating and cooling day of the year and is paid silently through your hydro bill.

For dual-fuel systems — where a ducted heat pump is paired with a gas furnace backup — maintenance is even more important. Both systems need to be in proper working order and correctly coordinated through the thermostat control logic. A failure in either component, or a miscalibration of the switchover point, can leave your home inadequately heated during the coldest periods without any obvious sign that something is wrong.

Every annual maintenance visit for a ducted heat pump system is comprehensive and systematic. Our certified technicians work through a complete checklist covering the outdoor unit, the indoor air handler, the duct system connections, the refrigerant circuit, and the control system.

Outdoor Unit Service

• Condenser coil inspection and cleaning: The outdoor coil is exposed to road dust, pollen, cottonwood, grass clippings, and seasonal debris year-round. We inspect the coil fins for blockage and damage, and clean the coil to restore full heat transfer capacity. A dirty condenser coil forces the compressor to work harder in both heating and cooling modes — cleaning it is one of the highest-impact maintenance tasks on the outdoor unit.
• Compressor inspection: We listen for abnormal operating sounds, measure compressor amperage draw, and assess overall compressor health. The compressor is the most expensive component in the system — early detection of a developing issue can mean the difference between a minor repair and a major replacement.
• Condenser fan motor and blade inspection: We check the outdoor fan motor for bearing wear, correct operating speed, and unusual noise, and inspect the fan blades for damage or imbalance that could cause vibration and accelerated wear.
• Refrigerant pressure check: We measure system operating pressures against manufacturer specifications to confirm that the refrigerant charge is correct. Low refrigerant is almost always the result of a leak — we identify low charge early, before it causes compressor damage, and locate and repair the leak source.
• Defrost system test and calibration: We verify that the defrost control board, defrost thermostat, and defrost sensor are all functioning correctly and initiating defrost cycles at the appropriate outdoor temperatures. A malfunctioning defrost system is one of the most common causes of winter heating failure in Ontario.
• Reversing valve function check: We confirm that the reversing valve switches correctly between heating and cooling modes. A reversing valve that is beginning to stick or fail intermittently can be difficult to diagnose in the field — catching it during a maintenance visit, when we can test both modes deliberately, is far preferable to diagnosing it during a mid-winter failure.
• Electrical component inspection: We inspect capacitors, contactors, disconnect fuse condition, and all electrical connections within the outdoor unit for signs of wear, corrosion, overheating, or impending failure. Capacitors and contactors are common wear items that fail with little warning — replacing a degraded capacitor during a maintenance visit is a $50 to $100 investment that prevents a service call.
• Unit mounting, clearance, and weatherproofing check: We confirm the unit is securely mounted, level, and has adequate clearance on all sides. We also inspect line set insulation and weather sealing at the wall penetration point.

Indoor Air Handler Service

• Air filter inspection and replacement guidance: We inspect the air handler filter, assess its condition, and replace it if a replacement filter is provided or advise on the correct filter type and replacement schedule for your system. Filter condition directly impacts airflow volume, system efficiency, and indoor air quality.
• Evaporator coil inspection and cleaning: The indoor evaporator coil collects dust, biological matter, and residue over time, particularly when filters are changed infrequently. We inspect the coil surface and clean it as needed. A clean evaporator coil is essential for efficient heat transfer in both heating and cooling modes and for preventing icing during cooling operation.
• Blower motor and wheel inspection: We inspect the indoor blower motor for bearing condition, correct amperage draw, and unusual operating noise. We also inspect the blower wheel for dust accumulation that reduces airflow efficiency and causes the motor to work harder than it should.
• Condensate drain pan and line inspection and flush: We inspect the condensate drain pan for standing water, biological growth, and cracks, and flush the drain line to confirm unobstructed drainage. A blocked condensate drain on a central air handler can cause water damage to surrounding building materials — it is one of the most common and most preventable sources of water damage from HVAC equipment.
• Electrical connection inspection: We check all terminal connections, control board wiring, and electrical components within the air handler for signs of overheating, corrosion, or looseness.
• Control board and sensor test: We test the air handler control board's response to thermostat signals, verify that temperature sensors are reading accurately, and confirm correct communication with the outdoor unit.
• Supply and return plenum inspection: We visually inspect the duct connections at the air handler's supply and return plenums for leakage, disconnection, or deterioration — the most common location for duct air losses.

Control System and Thermostat Check

• Thermostat calibration and function test: We verify that the thermostat is reading temperature accurately and responding correctly to heating and cooling calls. A thermostat that reads even a few degrees off will cause the system to run longer or shorter than it should, affecting both comfort and energy consumption.
• Dual-fuel control verification (where applicable): For systems paired with a gas furnace backup, we test the dual-fuel control logic — confirming that the heat pump is the primary system, that the switchover to gas occurs at the correct outdoor temperature threshold, and that the furnace activates properly when called. Dual-fuel system faults are often control-related and are routinely caught during this verification.
• Smart thermostat and scheduling review: For systems with smart thermostats, we confirm that scheduling, remote access, and any home automation integrations are functioning correctly and that settings reflect the homeowner's current comfort preferences.

Full System Performance Test

• Heating and cooling mode operational test: We run the system through both a heating cycle and a cooling cycle, confirming correct operation, adequate supply air temperature differential, and proper airflow through representative registers throughout the home.
• Airflow assessment: We check for signs of airflow imbalance — rooms that are consistently over or under conditioned — and identify whether the cause is equipment-related or duct-related.
• Refrigerant superheat and subcooling measurement: For a more precise assessment of refrigerant system health, we measure superheat and subcooling values against manufacturer specifications. These measurements provide early warning of refrigerant charge issues before operating pressures alone show a problem.
• Written condition summary: At the conclusion of every maintenance visit, we provide a written summary of the system's condition, any issues identified, recommended actions and their urgency, and the overall performance outlook for the coming season.

Whole-Home Protection, Not Just One Zone

Because a ducted system conditions every room in your home, the impact of a well-maintained system — or a neglected one — is felt everywhere. A maintenance plan ensures that the system responsible for your family's comfort in every room, through every season, is inspected and tuned before each period of peak demand.

Extended System Lifespan

A properly maintained ducted heat pump routinely lasts 15 to 20 years or more. Systems that go without regular professional service often develop compressor damage, coil fouling, refrigerant issues, and electrical degradation that shortens their useful life significantly — sometimes by five years or more. The cost of annual maintenance is modest compared to the cost of premature system replacement.

Lower Energy Bills Across Every Season

A ducted heat pump that hasn't been serviced in two or three years may be consuming significantly more electricity than a well-maintained system delivering the same comfort level. Dirty coils, low refrigerant, restricted airflow, and degraded electrical components all force the system to work harder for the same output. For a system that runs year-round, the energy savings from a properly maintained system compound across every heating and cooling day — and the payback on annual maintenance is often visible in your hydro bill.

Priority Emergency Service

Maintenance plan members receive priority dispatch for emergency service calls. In a province where a central heat pump failure in January means the entire home goes cold — not just one room — the ability to move to the front of the service queue during a peak demand period is a meaningful benefit. When technicians are in high demand across Ontario during a cold snap, maintenance plan members get there first.

Preferred Pricing on Repairs

If a repair is needed — whether identified during a maintenance visit or arising between visits — maintenance plan members receive preferred pricing on parts and labour. Our technicians also arrive with detailed familiarity with your specific system from previous visits, which means faster diagnosis, fewer return trips, and more accurate first-visit resolution.

Manufacturer Warranty Compliance

Most major ducted heat pump manufacturers — including Lennox, Daikin, Bosch, and American Standard — specify annual professional maintenance as a condition of extended warranty coverage. Gaps in professional service records can be grounds for a manufacturer to deny a warranty claim on a failed component. Every Constant Home Comfort maintenance visit is documented and those records are available to you on request, providing the proof of service required to support warranty claims throughout the system's life.

Dual-Fuel System Confidence

For homeowners with a ducted heat pump paired to a gas furnace, a maintenance visit covers both systems in coordination — not just the heat pump in isolation. We verify that the heat pump is performing correctly as the primary heating system, that the gas furnace backup is in proper working order, and that the dual-fuel control logic is correctly configured. Ontario winters are not the time to discover that your gas furnace backup hasn't been fired in two years and won't start.

Professional annual servicing is the foundation of good system maintenance, but there are several straightforward things you can do between visits to support your system's performance:

• Change the air filter on schedule: This is the single most impactful thing a homeowner can do. A clogged filter restricts airflow, reduces system efficiency, causes the evaporator coil to freeze, and stresses the blower motor. Check your filter monthly during peak seasons and replace it every one to three months depending on filter type, household conditions, and whether you have pets. Use the filter type and MERV rating recommended by your system's manufacturer — too-restrictive filters can cause airflow problems just as a clogged filter does.
• Keep supply and return registers open and unobstructed: Closing off supply registers in unused rooms does not save energy in a central heat pump system — it creates static pressure imbalances that reduce efficiency and stress system components. Keep all registers open and clear of furniture, rugs, and curtains.
• Keep the outdoor unit clear year-round: Remove leaves, grass clippings, cottonwood, and debris from around the outdoor unit as seasons change. In winter, check after significant snowfall to confirm the unit is not buried — modern heat pumps have defrost cycles, but they cannot operate if the entire unit is packed with snow. Maintain at least 18 to 24 inches of clearance on all sides.
• Do not cover the outdoor unit in winter: This is a common misconception. Covering the outdoor unit prevents it from operating and can trap moisture that causes corrosion. Modern ducted heat pumps are designed and weatherproofed to operate outdoors year-round. The only appropriate cover is a roof-style shield that protects the top of the unit from falling ice — not a full wrap that blocks the sides.
• Monitor system behaviour and thermostat readings: Longer-than-usual run times, rooms that are harder to heat or cool than before, unusual sounds from the air handler or outdoor unit, or higher-than-expected energy bills are all worth noting and reporting. These patterns often precede a failure by weeks or months and are valuable diagnostic information for our technicians.
• Record and report any error codes: If your thermostat or air handler displays an error code or fault indicator, photograph it or write it down before resetting the system. This information helps our technicians diagnose intermittent issues that may not be actively occurring at the time of the service visit.

For most Ontario homes, one professional maintenance visit per year is the standard and the minimum we recommend. Most manufacturers specify annual service as a warranty condition.

Some situations warrant more frequent servicing:

• Twice-yearly servicing: Recommended for homes with pets, households with members who have respiratory sensitivities or allergies, homes in high-pollen or high-cottonwood areas, properties where the system is running near its capacity limit, or systems serving commercial or high-occupancy spaces.
• Pre-season visits: Some homeowners prefer to schedule a visit specifically before the heating season begins in autumn and again before the cooling season in spring — ensuring the system has been assessed and tuned for each period of heavy use. This is particularly valuable for dual-fuel systems, where pre-season verification of both the heat pump and the furnace backup provides confidence heading into winter.

Ask us about annual and bi-annual plan options when you enrol.

You do not need to have purchased your system from Constant Home Comfort to enrol in a maintenance plan. We service ducted heat pump systems from all major manufacturers, including:

• Lennox
• Daikin
• Bosch
• American Standard
• Carrier
• Trane
• Bryant
• Goodman
• York
• Rheem
• Armstrong Air
• And most other residential central heat pump brands

If you are a new homeowner who inherited a central heat pump, or if your system was installed by a previous contractor and you want to establish a professional service relationship going forward, we are happy to take over maintenance of your system. Our first visit will include a full condition assessment documenting the system's current state before we begin ongoing care.

Constant Home Comfort provides ducted heat pump maintenance plans 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 communities across Ontario — call us to confirm availability in your area

Does my manufacturer warranty require annual professional maintenance?

Yes, for most major brands. Lennox, Daikin, Bosch, and American Standard all specify annual professional servicing as a condition of their extended warranty coverage. Failing to maintain documented service records can result in a warranty claim being denied. Our maintenance visits are fully documented and we can provide service history records on request.

Can I enrol in a maintenance plan if I didn't buy my system from Constant Home Comfort?

Absolutely. We provide maintenance plans for ducted heat pump systems from all major brands regardless of who supplied or installed them. The only condition is that the system is in serviceable condition — we confirm this during the enrollment assessment visit.

What is the best time of year to schedule a maintenance visit?

Late summer or early autumn — before the heating season begins — is the most popular timing, as it ensures the system is fully tuned before its heaviest workload begins. Spring is also a strong choice to prepare for the cooling season. For dual-fuel system owners, we particularly recommend autumn visits so that both the heat pump and gas furnace backup can be tested and verified before winter arrives. The most important thing is that a visit happens every year, on a consistent schedule.

Does the maintenance visit cover my gas furnace if I have a dual-fuel system?

Our ducted heat pump maintenance plan includes verification of dual-fuel control system operation and a basic operational check of the gas furnace backup — confirming that it starts, runs, and responds correctly to thermostat calls. A full, dedicated furnace maintenance visit covers additional furnace-specific components such as the heat exchanger, burner assembly, gas valve, and flue. Ask us about combined heat pump and furnace maintenance plan options if you have a dual-fuel system.

What if my system needs a repair during the maintenance visit?

If our technician identifies a repair need during a maintenance visit, we explain the issue clearly, provide upfront pricing, and proceed with your approval. Maintenance plan members receive preferred pricing on parts and labour. We carry a comprehensive parts inventory for all major brands and can often complete straightforward repairs during the same visit, avoiding a return trip.

How much does a maintenance plan cost?

Pricing depends on the system configuration — single heat pump, dual-fuel setup, system age, and service frequency selected. Contact us for a quote tailored to your specific equipment. One-time annual tune-up visits are also available for homeowners who prefer to book year by year rather than enrolling in a plan.

Your central heat pump is responsible for keeping every room in your home comfortable through every season Ontario delivers. It deserves the same level of professional attention you'd give any other major mechanical system in your home. A Constant Home Comfort maintenance plan provides exactly that — systematic annual servicing by certified technicians, priority emergency access, preferred repair pricing, and documented service records that protect your warranty and support your home's value.

Call us today to discuss your options and schedule your first visit. We serve homeowners across Toronto, the GTA, and all of Ontario.

Call us: 1 (888) 675-5907

Visit: constanthomecomfort.com

Serving Toronto, GTA, Hamilton, Ottawa, London, Barrie, Waterloo, Burlington, and all of Ontario.