Oregon winters can be long and cold, and when your heat pump stops keeping up, it is more than just a minor inconvenience. A home that is slow to warm or never feels quite comfortable is a common complaint once temperatures stay below freezing. Even when everything seems to be working on the surface, your system could still be struggling.
Many homeowners start looking for answers this time of year, especially when the unit runs nonstop or the air coming from the vents is not warm enough. If any of this sounds familiar, we at ACES HVAC, a family-owned and operated HVAC company serving Hermiston, Oregon, for over 20 years, are here to help break down the possible reasons your heat pump might be struggling and how heat pump repairs can help restore steady comfort to your home.
Common Reasons Heat Pumps Struggle in Cold Weather
Heat pumps are designed to move heat from one space to another. That process works well most of the year but hits a wall when outdoor temperatures dip into freezing for extended periods. Here is what can cause the system to fall behind.
• Very cold air outside makes it harder to absorb enough heat to warm your home. Since heat pumps move heat, not make it, their output drops as the temperature outside falls.
• Frozen coils on the outdoor unit can stop heat transfer altogether. If the defrost cycle is not working properly, snow or frost can collect on the unit and freeze things up.
• Blocked airflow is another issue. A clogged air filter or blocked return vents can cause warm air to get trapped, forcing the system to work harder but deliver less.
Each of these issues limits how efficiently the system runs, and some could turn into more serious problems if left unaddressed through the rest of winter.
Is Your Heat Pump Properly Sized for Your Home?
Even when all the parts are working well, a heat pump that is too small just cannot keep up during cold spells. Sizing matters more than many homeowners realize, and winter in places like Hermiston, Oregon, puts a real load on the system.
Older homes with outdated or lower-capacity equipment may have trouble maintaining warmth below 30 degrees. It is not unusual for a system to operate just fine in early fall, then struggle completely once consistent winter weather sets in.
If your system runs constantly but never really reaches the desired temperature, or if parts of your home are colder than others, undersizing could be playing a role. Having the system assessed by a pro can help decide whether it is the right size or if something else is holding it back.
Signs It’s Time to Call for Heat Pump Repairs
Not every issue shows up all at once. Often there are small signals that something is not quite right. Some signs are easy to spot if you know what to look for.
Below are some common warning signs that point to the need for heat pump repairs.
• Your system is running but only blowing room-temperature or cold air
• You hear clicking, buzzing, grinding, or other odd noises from the indoor or outdoor unit
• Your electric bill has spiked, even though your thermostat settings have not changed
• There is frost buildup on the outdoor coil, or the backup heater seems to activate too often
These symptoms usually show up before a total breakdown happens. A trained technician can test different parts of the system like the defrost control, refrigerant levels, and internal components to get it working again before things get worse.
How Regular Maintenance Helps Prevent Winter Struggles
Preventing big problems starts with small checks. Regular maintenance might not seem important when your system seems to run fine, but it is one of the best ways to stay ahead of winter performance issues.
Simple tasks can make a big difference.
• Cleaning or changing the air filter regularly keeps airflow moving and prevents strain on the motor
• Inspecting and cleaning coils keeps the outdoor unit from being covered with grime or frost that blocks heat exchange
• Testing settings and sensors helps confirm that the thermostat, backup heat, and defrost cycles all kick on at the right time
We offer HVAC maintenance plans for Hermiston homeowners that include in-depth system inspections, professional cleaning, and priority service when your system needs attention.
With freezing nights being common in Hermiston most of January and February, maintenance gives your equipment the best shot at keeping up when you need it most.
When Backup Heating Might Be Needed
Sometimes the best way to stay warm is to use a little help. Many homes have backup heating systems that work alongside their heat pumps. These can include electric resistance strips built into the system or a separate furnace that handles extreme cold.
Understanding when these systems should and should not be running is just as important as having them. Here are a few things to watch for.
• If your backup heater runs all the time, it might mean your main heat pump is not pulling its weight
• A sudden jump in power usage could mean the backup heat is overused if the defrost cycle or system efficiency is not where it should be
Backup systems are helpful when snow or ice hits hard, but they are not meant to run nonstop. If they are, it usually means the main system needs a closer look.
Keep Warm Through the Cold with the Right Support
A heat pump that cannot keep up does not always need to be replaced. In many cases, a few timely repairs or some fresh maintenance can get it back in shape. Whether it is frozen coils, airflow problems, or improper sizing, these issues tend to surface during the hardest part of the season.
By learning how your system works in cold weather and recognizing some early warning signs, it becomes easier to avoid bigger problems later on. For those of us here in Hermiston or nearby areas in Eastern Oregon, staying ahead of the weather means being ready to act when your system slips behind. We support both residential and commercial customers across Eastern Oregon and Washington as they manage these temperature swings each year.
Experiencing a heat pump that struggles on cold winter nights can quickly turn into a major concern. We understand that small issues like frozen coils or faulty defrost cycles can escalate into bigger problems if not addressed quickly. Our team here in Hermiston is ready to diagnose and resolve heating challenges before they snowball further. If you notice signs that you may need heat pump repairs, do not wait for a breakdown. Contact ACES HVAC today and let us help you get things back on track.