By Eli Nikolin, Co-Founder of Product Air Heating, Cooling, and Electric
If your heat pump has not been serviced this year, I would rather have it checked before winter than wait until something stops working. One of the calls we regularly get during the heating season is from a homeowner who wakes up to a cold house. Sometimes the problem is relatively simple to repair. Other times, we find an electrical fault, a refrigerant issue, or a failed component that needs more work. The difficulty is that homeowners often have no way of knowing which problem they have until the heating system stops doing its job.
I don't think every heat pump needs an expensive repair just because winter is approaching, and I certainly wouldn't recommend replacing equipment that still makes sense to maintain. But I do think homeowners should understand what condition their system is in before they have to depend on it every day.
In Duvall, heating is typically needed from around November through March. The Snoqualmie Valley has long stretches of cool, damp weather, and even though we don't experience prolonged extreme freezes every winter, heat pumps still have to work consistently through those months. If your annual service is due, fall is a practical time to get it done. The U.S. Department of Energy recommends annual professional maintenance, and ENERGY STAR advises scheduling heating system checkups in the fall.
A Heat Pump Can Be Running Without Working as Efficiently as It Should
One thing I want homeowners to understand is that a heat pump doesn't have to stop producing heat before maintenance matters. A system can still run with restricted airflow, dirty components, or other conditions that affect its performance. You may not notice a major comfort problem immediately, but the equipment may be using more energy than necessary.
The Department of Energy estimates that the difference in energy consumption between a well-maintained heat pump and a severely neglected one can be 10% to 25%. That doesn't mean every homeowner will save 25% by scheduling one service visit. It means the condition of the equipment can make a meaningful difference, particularly when a system has gone a long time without proper attention.
I usually tell homeowners to start with the things they can safely check themselves. Look at the air filter every month, and replace it when its condition requires it. A typical 1-inch filter may last one to three months, while thicker 4- or 5-inch filters can often last around six months. Pets, indoor air quality concerns, and higher-MERV filters can change that schedule. The important thing is not to let a clogged filter restrict the airflow your system needs. I would also keep leaves and other debris away from the outdoor unit. That is especially relevant during fall in Western Washington. You don't need to take the equipment apart or attempt professional coil cleaning yourself. Just make sure the unit has room to move air, and leave internal cleaning and testing to a technician.
Thermostat settings matter too. If you have a system with auxiliary electric resistance heat, a large temperature setback followed by a rapid increase can cause the backup heat to run. That may cost more electricity than maintaining a steadier temperature. I would rather see homeowners understand how their particular thermostat and heating system operate than follow a universal temperature-setting rule.
The Professional Inspection Should Go Beyond Changing a Filter
When we service a heat pump, we're looking at how the entire system operates. That includes airflow and duct condition, refrigerant charge, electrical connections, controls, thermostat operation, the indoor blower, and the outdoor coil. The point is to identify conditions that could reduce efficiency, affect comfort, or contribute to a breakdown.
I don't like treating a maintenance visit as a reason to recommend unnecessary repairs. If the system is operating properly and the components are in good condition, homeowners should know that. If testing reveals a problem, I want them to understand what we found and why it matters before making a decision. There is also a difference between annual preventive maintenance and diagnosing a system that is already malfunctioning. If a heat pump is producing no heat, making unusual noises, or repeatedly failing to complete a normal operating cycle, we need to identify the cause. A routine filter change won't resolve an electrical fault or a failed component.
Not Every Frosty Outdoor Unit Needs a Repair
Duvall's winter weather creates a situation that sometimes worries homeowners unnecessarily. When outdoor temperatures are low and humidity is high, frost can accumulate on a heat pump's outdoor coil. The system is designed to enter a defrost cycle periodically to melt that frost. You may even see steam coming from the outdoor unit during defrost. That can be completely normal, and manufacturers such as Trane explain that visible steam alone isn't a sign of equipment failure.
What I would pay attention to is whether the frost clears and the heat pump returns to normal heating. If ice keeps building up, defrost cycles last much longer than usual, or the system struggles to maintain indoor temperatures, I would have it checked. The same applies to banging, screeching, or grinding noises, or cool air coming from the vents for extended periods outside normal defrost operation.
If you have manually switched the thermostat to emergency heat because the heat pump isn't heating, that is another reason to schedule service. Emergency heat can keep the home warm when the system is equipped for it, but it doesn't tell us why the heat pump itself stopped working.
Our service vehicles carry many common sensors and electrical components, so some problems can be repaired without waiting for a separate parts order. Still, I wouldn't promise a particular repair before diagnosing the equipment. Two homeowners can report exactly the same symptom and have completely different mechanical problems.
What Heat Pump Maintenance and Repair Cost in Duvall
For homeowners planning their heating expenses, our current maintenance pricing is $149 for a single visit or $299 for two seasonal maintenance visits. We also offer membership options with different coverage levels, and those are priced separately.
Repair costs are more difficult to generalize. A heat pump that won't heat could have a control problem, an electrical issue, low refrigerant, or a failed major component. Those repairs don't cost the same, and I don't think it's responsible to give someone a fixed repair price before testing the system.
We diagnose the problem first, explain what needs attention, and provide the repair price before starting the work. That gives the homeowner an opportunity to decide how to proceed instead of approving a repair without knowing what they're paying for.
Maintenance also matters when considering warranty coverage. Equipment we install carries a five-year labor warranty, and continued maintenance can allow us to extend that labor coverage beyond the initial five years. That is separate from the manufacturer's equipment warranty, so homeowners should understand the terms of both.
A Cold-Climate Heat Pump Can Work in Duvall, but Sizing Matters
I still hear the concern that heat pumps stop being useful once outdoor temperatures get too low. I understand where that comes from, especially if someone remembers older equipment that struggled during cold weather. But I wouldn't evaluate a modern cold-climate heat pump based on one outdoor temperature.
The Department of Energy explains that cold-climate heat pumps are designed to perform at temperatures as low as 5°F, and some models are designed to operate below that. The actual heating output depends on the equipment, outdoor conditions, and the amount of heat the home needs. That last part is important. A heat pump has to be sized for the house, not just selected because it has an attractive efficiency rating. We look at the home's heating load, the existing system, electrical capacity, and the owner's comfort expectations before recommending equipment.
We've installed more than 400 heat pumps, and only two homeowners have told us their systems didn't provide enough heat for their comfort. In our experience, most homes we equip with a Mitsubishi cold-climate heat pump don't require backup electric heat strips. I wouldn't turn that experience into a promise for every property, though. The right design still depends on the individual house.
Replacing a Furnace With a Heat Pump Does Not Guarantee Lower Bills
If someone already has a working furnace, I don't automatically tell them to replace it with a heat pump to save money. The answer depends on what equipment they're replacing and what they want from the new system.
The Department of Energy states that air-source heat pumps can reduce electricity use for heating by up to 75% compared with electric resistance heating, such as baseboard heaters. That is a meaningful comparison, but it isn't the same as saying every homeowner will reduce their heating bill by 75%.
If you already have a gas furnace rated at 97% AFUE, your heating costs may stay about the same after switching to a heat pump. In that situation, the real benefit may be having efficient cooling during summer, improving comfort, or combining heating and air conditioning in one system.
We work with homes that have gas or electric furnaces, central air conditioning, ducted heat pumps, and ductless systems. Sometimes a homeowner wants to add air conditioning to existing ductwork rather than replace the heating equipment. Other times, a ductless mini-split is the better fit for an addition, garage, condo, or older home without ducts serving every room.
I don't think those projects should all receive the same recommendation. If a furnace remains the primary heating source, it also deserves its own fall inspection. The goal is to have a heating and cooling setup that works for the property, not to replace functioning equipment simply because a newer technology is available.
What a New Heat Pump Installation Can Cost
Heat pump installation costs depend on much more than the outdoor equipment. Existing ductwork, electrical capacity, the system configuration, permits, and the amount of installation work all affect the final price.
Our published examples start at $8,520 for adding a RunTru system to an existing setup and reach $22,664 for a complete Mitsubishi replacement, with permits included in those examples. If the project requires an electrical panel upgrade or a long electrical run, that additional work may add approximately $1,500 to $4,500, depending on the conditions. Those figures are examples, not universal quotes for every Duvall home. Before we recommend a replacement, we calculate the home's heating and cooling load and look at what equipment is already there. A house with usable ductwork and adequate electrical capacity is a different project from one that needs substantial electrical upgrades or a new distribution system.
For me, the important question isn't whether a homeowner can buy the most expensive heat pump. It's whether the equipment and installation make sense for the house and the way the family uses it.
I Would Rather Find a Heating Problem Before a Cold Morning
I don't tell homeowners that every minor noise means their heat pump is about to fail, and I don't think an older heating system automatically needs to be replaced. What concerns me is when a system is showing clear warning signs and nobody has investigated them before winter.
If the annual service is due, schedule it. If ice keeps growing on the outdoor unit, the heating becomes unreliable, or you hear unusual mechanical noises, have the problem diagnosed. If you're thinking about replacing a furnace or installing a heat pump, compare the actual comfort benefits, installation requirements, and operating costs before making the decision.
Winter maintenance doesn't have to become a major project. Sometimes the system simply needs routine attention. Sometimes an inspection identifies a repair worth handling before the weather gets colder. Either way, I would rather the homeowner understand the condition of the equipment while they still have time to make a considered decision.
Our Issaquah team provides heat pump maintenance, repair, and installation services in Duvall and throughout the Eastside. We approach those calls with a straightforward principle: diagnose the problem first, and recommend the solution that makes sense for the homeowner.
For more detailed information about maintenance, repair symptoms, equipment options, and local installation costs, read my complete guide to pre-winter heat pump maintenance and repair in Duvall, WA.
Expert Conversation with Eli Nikolin
The Stone Magazine (TSM): Eli, if a homeowner's heat pump seems to be running normally, should they still have it serviced before winter?
Eli Nikolin (EN): If their annual service is due, yes. I don't recommend maintenance because I assume something is broken. I recommend it because a system can have restricted airflow or another developing issue while still producing heat. I'd rather check it before winter than wait for the homeowner to wake up without heating.
TSM: Why is fall a particularly good time for that in Duvall?
EN: Most homes here need heating regularly from around November through March. The weather stays cool and damp, and the system works through that entire stretch. Fall gives us an opportunity to check it before the homeowner is depending on it every day. The Department of Energy recommends annual service, so it's a practical schedule rather than a special requirement for Duvall.
TSM: How much does a typical maintenance visit cost?
EN: Our current price is $149 for one maintenance visit or $299 for two seasonal visits. Membership plans are separate. If we find something that needs repair, that's different work, and we explain the price before starting.
TSM: Can a dirty air filter really make much difference?
EN: Yes. A heat pump needs adequate airflow, and a clogged filter restricts it. I tell homeowners to check the filter monthly rather than assume every filter lasts the same number of months. A 1-inch filter and a 5-inch filter have different replacement schedules, and pets or other household conditions can change how quickly they get dirty.
TSM: Homeowners sometimes see steam coming from the outdoor unit in winter. Should they be worried?
EN: Not just because they see steam. When the outdoor coil develops frost, the heat pump can enter defrost mode to melt it. Steam during that process can be normal. I become more concerned when ice keeps accumulating, defrost takes much longer than usual, or the system isn't heating properly afterward.
TSM: What symptoms would make you recommend a repair appointment rather than waiting for routine maintenance?
EN: No heat, persistent ice buildup, unusual banging or grinding noises, or extended periods of cool air from the vents outside a normal defrost cycle. If somebody has switched to emergency heat because the heat pump isn't working, I want to know why. The important thing is to diagnose the cause rather than assume all those symptoms mean the same repair.
TSM: Can a modern heat pump really heat a home during a cold Duvall winter?
EN: Yes, when the equipment is appropriate for the home and installed correctly. Cold-climate models are designed for low outdoor temperatures. We've installed more than 400 heat pumps, and only two homeowners have reported that their systems didn't provide enough heat for their comfort. Most homes where we install a Mitsubishi cold-climate unit don't need backup heat strips, but I still look at the home's heating load before making that recommendation.
TSM: Does that mean every homeowner should replace their gas furnace with a heat pump?
EN: No. If someone already has a 97% AFUE gas furnace, I wouldn't promise that a heat pump will dramatically lower their heating bill. They may benefit more from having cooling, improved comfort, or one system that handles both heating and air conditioning. The economics depend on what they're replacing.
TSM: What should homeowners expect to spend if they do decide to install a new heat pump?
EN: Our published examples range from $8,520 for adding a RunTru system to an existing setup to $22,664 for a complete Mitsubishi replacement, including permits. Electrical work can add another $1,500 to $4,500 in some projects. But I don't want people treating those examples as fixed quotes. We have to look at the home's ductwork, electrical capacity, heating load, and the actual installation requirements.
TSM: What about the informal 20-degree rule people mention when discussing heat pumps?
EN: That's a cooling rule of thumb, not a winter heating rule. People sometimes describe it as keeping the indoor temperature no more than 20°F below the outdoor temperature. It isn't an official standard, and it doesn't mean a heat pump cannot cool beyond that difference. I wouldn't use it to evaluate winter heating performance.
TSM: What's the biggest mistake homeowners make when preparing their heating systems for winter?
EN: Waiting until the system stops heating before paying attention to it. I'm not saying every heat pump needs a repair every fall. But if maintenance is overdue or the equipment is already showing symptoms, I would rather investigate while there's still time to make a good decision instead of dealing with it when the house is cold.
