Heat Pump Repair

Expert Heat Pump Repair Across Chicago's North Shore

Is your heat pump blowing lukewarm air, encased in a solid block of ice, or constantly running on expensive "Auxiliary Heat" without actually changing the room temperature? These are serious mechanical lockouts that require professional diagnostics, not just a simple filter change or a thermostat reset. GV's Heating & Cooling is ready with 24/7 emergency response to get your primary heating and cooling system back online.

Warning Signs Your Heat Pump Needs Professional Repair

The System is Stuck in One Mode

You set the thermostat to heat, but the vents blow cold air, or you switch it to cool and it blasts heat. Mechanically, this almost always points to a stuck or failing reversing valve, which is the literal heart of a heat pump system. If ignored, the compressor will run continuously against a blocked restriction, which can overheat and burn out the motor entirely.

The Outdoor Unit is Encased in Ice

You notice a heavy buildup of frost or solid ice completely covering the outdoor condenser coils, and it refuses to melt away. When the unit turns into an ice block, it means the built-in defrost control board, the defrost thermostat, or the reversing valve has failed. Running an iced-over heat pump acts like a suffocating blanket that destroys efficiency and will eventually crush the delicate aluminum fins or fan blades.

The Auxiliary Heat is Constantly On

Your thermostat indicates that the auxiliary or emergency heat is running constantly, even when the outdoor temperature is relatively mild. This means the primary heat pump compressor has failed, the system is critically low on refrigerant, or the outdoor unit has locked itself out due to a safety fault. Auxiliary heat uses massive amounts of electricity, and ignoring this will result in a shockingly high utility bill at the end of the month.

Rapid Short-Cycling

The heat pump turns on, runs for two or three minutes, shuts off, and immediately tries to start again. This rapid on-and-off behavior means the system is tripping a high-pressure or low-pressure safety switch, usually caused by a severe refrigerant leak or a failing run capacitor. Short-cycling puts immense mechanical stress on the compressor, and if it does this hundreds of times a day, the compressor will overheat and die prematurely.

Hissing, Bubbling, or Screeching Noises

You hear an audible hissing or bubbling sound coming from the refrigerant lines, or a loud metal-on-metal screeching when the outdoor unit starts. Hissing is the classic sound of pressurized refrigerant escaping through a crack, while screeching usually indicates a failing fan motor bearing. Refrigerant leaks allow moisture to enter the sealed loop, creating an acid that eats the compressor from the inside out, while screeching motors will eventually seize up completely.

What Is Actually Causing Your Heat Pump to Fail

Reversing Valve Failure

Because a heat pump provides both heating and cooling, the reversing valve engages and disengages constantly year-round. Over time, the internal slider can get physically jammed, or the electrical solenoid coil that magnetizes the valve can burn out. We test the electrical voltage to the solenoid to determine if we can replace just the coil, or if we need to recover the refrigerant and braze in a brand new valve.

Defrost Control Board Malfunctions

Heat pumps deal with a lot of fluctuating moisture, which forces the system into its defrost cycle frequently to melt away normal frost. The defrost control board acts as the brain for this process, and when the board shorts out or the attached sensors fail, the system forgets how to melt its own ice. We fix this by isolating the electrical fault, testing the thermistor sensors, and replacing the circuit board if it can no longer initiate the defrost sequence.

Refrigerant Leaks in the Coils

Heat pumps operate under very high pressures, and over years of vibration and thermal expansion, the copper joints or the thin tubing in the coils can develop micro-fractures. We never just top off a leaking system, because that is a temporary band-aid that ignores the root problem and leaves your equipment vulnerable. Instead, we use electronic leak detectors and ultrasonic tools to pinpoint the exact location of the leak, repair the copper joint, and weigh in the exact factory specification of fresh refrigerant.

Worn Compressor Contactors

The contactor is a heavy-duty electrical relay that slams shut to send high voltage to the compressor and outdoor fan. Because heat pumps run nearly every day of the year, this contactor opens and closes thousands of times, causing electrical arcing that pits the metal contacts. We shut down high voltage to the system, remove the pitted contactor, and wire in a heavy-duty replacement so your compressor receives clean, consistent power without damaging voltage drops.

What to Expect During Your Heat Pump Repair Visit

When you call for heat pump repair, you need a technician who understands the deep complexities of a dual-action refrigeration cycle. Because we work with Amana and every other major brand, our technicians arrive ready to diagnose the root cause, not just the surface symptom. We start by interviewing you about exactly what you have noticed, from strange noises and thermostat behavior to unusual ice buildup on the outdoor cabinet.

Next, we move straight to the equipment to run a comprehensive diagnostic protocol. We check the indoor air handler to ensure the blower is moving the correct volume of air, verify the electrical draw on your auxiliary heat strips, and hook up our digital manifold gauges to the outdoor unit to read the subcooling and superheat pressures. We also test the microfarad readings on your capacitors and manually trigger the reversing valve to ensure it shifts smoothly under pressure.

Once we isolate the exact point of failure, we sit down with you to explain exactly what broke and why. GV's Heating & Cooling provides a clear, upfront plan to fix the issue with clear explanations of the available options. Our primary focus is restoring your comfort safely and efficiently, ensuring your heat pump operates exactly as the manufacturer intended.

Heat Pump Repair Coverage Across Chicago's North Shore

A failing heat pump demands immediate attention, which is why our technicians evaluate the equipment and diagnose the failure. Technicians diagnose heat pump lockouts and confirm any required parts or refrigerant work after inspection.

Highland Park, IL, Lake Forest, IL, Kenilworth, IL, Wilmette, IL, Winnetka, IL

Glenview, IL, Lincolnshire, IL, Northbrook, IL, Deerfield, IL, Vernon Hills, IL, Bannockburn, IL, Riverwoods, IL

South Barrington, IL, Buffalo Grove, IL, Wheeling, IL, Arlington Heights, IL, Palatine, IL, Barrington Hills, IL

Related Services

Sometimes a heat pump repair visit reveals that your home's layout requires a more targeted approach to resolve persistent hot and cold spots. In these situations, we might discuss installing a ductless mini-split system to supplement your primary equipment and handle those difficult zones. We also provide comprehensive indoor air quality services to ensure the air circulating through your newly repaired heat pump is clean, healthy, and properly humidified.

Get Your Heat Pump Running Right Again

Living with a malfunctioning heat pump means dealing with unpredictable indoor temperatures, soaring electric bills, and the constant worry that the system will shut down completely when you need it most. You shouldn't have to rely on expensive, inefficient emergency heat strips just to keep your family comfortable.

Since 1990, GV's Heating & Cooling has been a family-owned company doing honest, expert HVAC troubleshooting. Reach out to schedule your heat pump repair today, and let our family restore comfort to yours.