If the heat pump cools but doesn't heat
The issue may involve thermostat settings, defrost operation, refrigerant, reversing valve operation, backup heat controls, airflow, or outdoor unit performance.
When your heat pump is not heating, not cooling, blowing the wrong temperature air, freezing up, or struggling to switch modes, All Year Heating & Air can inspect the system, explain the issue, and recommend practical repair options.
A heat pump is different from a standard furnace or air conditioner because it helps with both heating and cooling. When something goes wrong, your home may feel too hot, too cold, humid, drafty, or uncomfortable in both seasons.
If your heat pump is not heating, not cooling, blowing the wrong temperature air, freezing up, or switching on and off too often, the safest next step is a professional diagnosis.
If the system runs but the home doesn't warm up, the issue may involve thermostat settings, airflow, refrigerant, defrost operation, controls, or mode switching.
If the heat pump won't cool, it may be dealing with airflow restrictions, outdoor unit problems, low refrigerant, thermostat issues, or a reversing valve / control problem.
Cold air in heating mode may mean the system isn't completing the heating cycle, has airflow problems, is in defrost mode, or needs a deeper diagnosis.
Some frost can happen during heating operation, but heavy ice, ice that keeps returning, or ice that doesn't clear can point to defrost, airflow, refrigerant, or sensor issues.
A heat pump that starts and stops frequently may have thermostat issues, airflow restrictions, electrical problems, overheating, or sizing/performance problems.
Weak airflow can make heating and cooling feel ineffective. Dirty filters, blocked vents, duct restrictions, blower issues, or coil problems may be involved.
Buzzing, grinding, rattling, squealing, or clicking noises can point to electrical, fan, motor, blower, compressor, or loose-component issues.
Musty, burning, or electrical smells should be checked. Shut the system off if something smells unsafe and call for professional help.
If the thermostat is blank, inaccurate, or not triggering heating or cooling correctly, the issue may involve settings, batteries, wiring, controls, or the thermostat itself.
A heat pump that runs constantly or struggles to reach temperature may use more energy because of airflow problems, refrigerant issues, controls, or declining system performance.
If the system won't switch modes, the issue may involve thermostat communication, control wiring, or the reversing valve.
Heat pump problems can come from more than one part of the system. During a service visit, All Year Heating & Air can inspect the thermostat, outdoor unit, indoor airflow, system operation, controls, and visible symptoms to narrow down what's causing the issue.
We don't publish DIY repair steps for refrigerant, capacitor, compressor, reversing valve, electrical, or control-board work. Heat pump internals should be serviced by a professional.
Heat pumps are unique because the same system can provide both heating and cooling. That means a heat pump problem can look like an AC issue in summer, a heating issue in winter, or a mode-switching issue when the system won't change from heat to cool — or cool to heat.
The issue may involve thermostat settings, defrost operation, refrigerant, reversing valve operation, backup heat controls, airflow, or outdoor unit performance.
The issue may involve cooling controls, airflow restrictions, low refrigerant, outdoor unit performance, dirty coils, thermostat communication, or reversing valve operation.
A good heat pump repair starts with a clear diagnosis. Because heat pumps handle both heating and cooling, the system needs to be checked in the right mode before repair recommendations are made.
We check the thermostat, system mode, airflow, outdoor unit, indoor operation, visible ice or moisture, and system response.
We narrow down what's causing the heating, cooling, airflow, defrost, electrical, or mode-switching issue and explain the repair options clearly.
If repair is practical, we work to restore comfort. If replacement or further evaluation is more sensible, we explain that before moving forward.
A heat pump problem doesn't automatically mean the system needs to be replaced. Many issues can be repaired when the system is otherwise in good condition and the problem is isolated. In other cases, repeated breakdowns, poor comfort, older equipment, high repair costs, or recurring heating and cooling problems may make replacement worth discussing.
If replacement is on the table, see our heat pump installation page or call to talk through options.
All Year Heating & Air is built for homeowners, landlords, and property managers who need clear answers and reliable service. Whether your heat pump is struggling to heat, cool, switch modes, or keep up with your home's comfort needs, our focus is practical diagnosis, respectful communication, and repair recommendations that fit the situation.
Service focused on Santa Clarita and nearby communities.
We inspect the system and explain what we find before recommending next steps.
We focus on repair when repair is practical and explain replacement only when it makes sense.
The service experience should feel professional, careful, and respectful of the home.
Helpful for occupied homes, rental properties, and repeat service needs.
Useful for customers who want one reliable service contact for home comfort and appliance issues.
All Year Heating & Air provides heat pump repair service across Santa Clarita Valley and nearby communities. If your heat pump isn't heating, isn't cooling, freezing up, or struggling to keep your home comfortable, schedule service in your area.
Explore heating, cooling, repair, and maintenance support from All Year Heating & Air.
View HVAC services →For traditional air conditioning problems, warm air, weak airflow, or AC system failures.
View AC repair →For broader heater and heating-system repair needs beyond heat pump-specific issues.
View heating repair →For furnace-specific symptoms, components, ignition issues, and safety concerns.
View furnace repair →For preventive service that helps heating and cooling systems perform reliably.
View AC maintenance →Availability depends on the current schedule — call to check current openings for your area.
Learn more →Real customer feedback for All Year Heating & Air across Santa Clarita Valley. The reviews below are general HVAC and heating reviews — they're not specifically heat pump repair reviews. We'll feature heat-pump-specific reviews here when available.
"I had an excellent experience with All Year Heating & Air. Gene and Yan were extremely professional and arrived right on time. They quickly identified the issue and resolved the problem efficiently..."
"Gene and his team are great with HVAC and home appliances. They recently got our broken Viking oven up and running quickly and at a fair price."
"Great experience with All Year Heating & Air. The team was on time, professional, and fixed the issue quickly. Everything works perfectly now—highly recommend."
Your heat pump may blow cold air in heating mode because of thermostat settings, airflow restrictions, defrost operation, refrigerant-related problems, control issues, or a system that's not switching modes correctly. If basic checks don't solve the issue, schedule a heat pump repair diagnosis.
A heat pump that's not heating may have a thermostat issue, restricted airflow, outdoor unit problem, defrost issue, refrigerant problem, reversing valve issue, or electrical/control problem. A technician can inspect the system and identify the cause.
A heat pump that's not cooling may have airflow restrictions, thermostat problems, low refrigerant, dirty coils, outdoor unit issues, compressor problems, or a reversing valve / control issue. If your system cools poorly or blows warm air in cooling mode, schedule service.
Some frost can happen during heating operation, but heavy ice, ice that keeps returning, or ice that doesn't clear may point to defrost cycle problems, airflow restrictions, refrigerant issues, or sensor/control problems. Turn the system off if it appears unsafe and call for professional diagnosis.
Frequent on-and-off cycling, also called short cycling, may be caused by thermostat issues, airflow restrictions, electrical problems, overheating, refrigerant issues, or system sizing/performance problems. Short cycling should be checked before it causes more wear.
Repair may make sense when the issue is isolated and the system is otherwise reliable. Replacement may be worth discussing if repairs are frequent, repair costs are high, heating and cooling problems keep returning, comfort is poor, or the system is older.
Yes. All Year Heating & Air provides heat pump repair in Santa Clarita and nearby Santa Clarita Valley communities, including Valencia, Newhall, Canyon Country, Saugus, Stevenson Ranch, and Castaic. See full coverage.
Yes. All Year Heating & Air supports landlords and property managers with heat pump repair needs, tenant coordination, diagnostic notes, and service scheduling for rental properties.
Check that the thermostat is set to the correct mode, the temperature setting is correct, the air filter isn't severely clogged, vents are open, and the outdoor unit isn't blocked by debris. Don't attempt refrigerant, electrical, compressor, capacitor, reversing valve, or internal heat pump repairs yourself.
Yes. Because heat pumps provide both heating and cooling, regular maintenance helps them operate more reliably in both seasons. Ask All Year Heating & Air about heat pump service options for your home or rental property.
Still Have Heat Pump Questions? Call Now Schedule Heat Pump Repair
If your heat pump is not heating, not cooling, freezing up, short cycling, or struggling to keep your home comfortable, All Year Heating & Air can help diagnose the problem and explain your repair options.
Serving Santa Clarita, Valencia, Newhall, Canyon Country, Saugus, Stevenson Ranch, Castaic, and nearby communities.