A heat pump runs twice as hard as a furnace, because it heats you all winter and cools you all summer. That year-round workload is exactly why maintenance matters more than most homeowners expect.
The short version: change your filters every 1 to 3 months, keep the outdoor unit clear, and book one professional service a year. Do those three things and a good cold-climate heat pump will hold its efficiency and hit its full 12 to 15 year lifespan. Skip them and you lose efficiency quietly, month after month, until a bill or a breakdown forces the issue.
Here is what that looks like in practice, split by what you can do yourself and what needs a technician.
Why heat pump maintenance is different
A furnace only works a few months a year. A heat pump is a single system that handles both heating and cooling, so it runs in some form almost every month in the Fraser Valley. More runtime means more air moving through the filter, more dust on the coils, and more wear on the outdoor unit.
The other difference is how efficiency slips. A furnace mostly either works or it does not. A heat pump can keep running while quietly getting less efficient, because a dirty coil or a clogged filter makes the compressor work harder to move the same amount of heat. You do not notice it as a failure. You notice it as a higher hydro bill and a house that takes longer to reach temperature.
That is the trap. Regular maintenance is what keeps a heat pump running at the efficiency you paid for.
What you can do yourself
Change the filter on schedule
This is the single most important thing a homeowner can do. A dirty filter chokes airflow, which forces the system to work harder and can eventually freeze the indoor coil.
Ducted systems: check the return-air filter monthly, replace every 1 to 3 months depending on the filter type and whether you have pets.
Ductless mini-splits: each indoor head has a washable mesh filter behind the front panel. Pop it out, rinse it, let it dry, put it back. Once a month during heavy use.
If you run the system continuously for filtration during wildfire smoke season, check filters more often. They load up faster than you would think.
Keep the outdoor unit clear
The outdoor unit needs open airflow on all sides to do its job. Give it room and keep it clean.
Clear leaves, grass clippings, and debris from the base and fins.
Keep at least 60 cm (about 2 feet) of clearance on every side, and don’t stack firewood, bins, or patio furniture against it.
Trim back shrubs and vines through the growing season.
In winter, brush snow off the top and sides after a storm, and keep the unit clear of drifting snow or ice from a roofline above. The unit sits on legs or a stand for a reason, it needs to breathe under the coil too.
Never chip ice off the coil with anything hard. If it is icing up repeatedly, that is a service call, not a DIY fix.
Watch and listen
You know your system’s normal. Between professional visits, keep an eye out for:
Longer run times or a house that struggles to hold temperature
New rattles, grinding, or buzzing from the outdoor unit
Ice building on the outdoor coil in cold weather that does not clear during a defrost cycle
A noticeable jump in your hydro bill with no change in weather or habits
Any of those is worth a call before it becomes a bigger repair.
What needs a professional
Some of the most important maintenance is out of reach for a homeowner, and that is by design. It involves refrigerant, electrical connections, and sealed components.
Book one professional service per year. A proper visit covers:
Refrigerant charge check. A heat pump is only as efficient as its refrigerant charge is correct. Low charge, often from a slow leak, quietly kills efficiency and can damage the compressor over time. Only a licensed technician can measure and adjust it.
Coil cleaning. Both the indoor and outdoor coils collect grime that insulates them and drops heat-transfer efficiency. A deep clean restores it.
Electrical inspection. Tightening connections, checking the contactor and capacitor, and confirming the disconnect and breaker are sound.
Defrost cycle test. Confirming the unit defrosts properly in cold weather, which matters a lot for Fraser Valley winters.
Blower and drain check. Cleaning the blower wheel and clearing the condensate drain line so it does not back up.
Overall performance measurement. Checking that the system is delivering the temperature split and airflow it should.
This is the same care that keeps a heat pump reaching its expected lifespan. We cover the full picture of what shortens and extends a system’s life in our guide to how long heat pumps last.
The year-round maintenance rhythm
Because a heat pump works in every season, it helps to think of maintenance as a calendar rather than a one-time spring tune-up.
Season | What it is doing | What to do |
|---|---|---|
Spring | Switching from heating to cooling | Book the annual pro service, clear winter debris, fresh filter |
Summer | Cooling and dehumidifying | Check filters monthly, keep outdoor unit clear, watch the condensate drain |
Fall | Switching back to heating | Fresh filter, confirm nothing is blocking the unit before the cold |
Winter | Heating, including defrost cycles | Brush off snow, keep the unit clear of ice, watch for persistent icing |
Spring is the natural time for the annual professional visit, because it sets the system up before the cooling season and confirms the winter’s heating work did not leave anything worn. If spring gets away from you, early fall is the next best window, before the heating season starts and before the booking rush. A heat pump that heats a Fraser Valley home reliably through winter is one that went into the cold season already checked, and we get into that in do heat pumps work in Fraser Valley winters.
DIY vs. pro, at a glance
You handle: filter changes, keeping the outdoor unit clear, brushing off snow, and watching for changes in performance or bills.
A technician handles: refrigerant, coil cleaning, electrical, defrost testing, blower and drain service, and performance measurement.
The homeowner tasks protect airflow. The professional tasks protect the guts of the system. You need both, and they cost far less together than a compressor replacement or a decade of quietly inflated hydro bills.
FAQ
How often should I service my heat pump?
Once a year for a professional service, ideally in spring before the cooling season. On top of that, change or clean the filter every 1 to 3 months yourself. A system that runs hard year-round benefits from that annual visit more than a furnace that only works a few months.
Can I do heat pump maintenance myself?
You can do the airflow side: filter changes, clearing debris from the outdoor unit, brushing off snow, and watching for changes. You cannot safely handle refrigerant, coil cleaning, or electrical work, which is why the annual professional visit still matters. Both halves keep the system efficient.
Why is my heat pump using more electricity than it used to?
The usual culprits are a dirty filter, dirty coils, or a low refrigerant charge from a slow leak. All three force the system to work harder for the same result. A dirty filter you can fix yourself; coils and refrigerant need a technician. If your bill climbed without a weather change, it is worth a look.
Does a ductless mini-split need less maintenance than a ducted system?
Not really. Ductless heads have washable filters you should rinse monthly during heavy use, and the outdoor unit still needs clearance and an annual professional service. The main difference is there is no central duct filter to swap, but each indoor head needs its own attention.
Is it normal for my heat pump to ice up in winter?
A light frost that clears during the defrost cycle is normal. Heavy ice that stays on the coil, or a unit that never seems to defrost, is not. Keep snow and roofline ice off the unit, and if persistent icing continues, book a service call rather than chipping at it.
What happens if I skip maintenance?
Efficiency drops quietly, so your bills climb before anything breaks. Over time, a neglected system runs harder, wears faster, and can fail years short of its 12 to 15 year potential. Skipped filter changes and a low refrigerant charge are two of the most common reasons a heat pump underperforms.
Cohesive Mechanical is the Fraser Valley’s trusted HVAC and plumbing experts - based in Chilliwack, serving Abbotsford, Langley, and the Lower Mainland since 2017. Done right the first time. Clean installs. Clear communication.
Due for your annual service, or thinking about an upgrade? Book a free quote and we’ll get your system checked and running at its best. Learn more about our heat pump installations.
Related: How Long Do Heat Pumps Last? and Do Heat Pumps Work in Fraser Valley Winters?
