AC Heat Pump Repair in Houston, TX - Dual-Mode Diagnostics Done Right

A heat pump heats and cools your home through one compressor, one refrigerant circuit, and a reversing valve that switches between modes. When something fails, fewer technicians understand both sides of the system. 75 Degree AC has licensed, EPA-certified contractors trained on full heat pump diagnostics including defrost cycles and reversing valve logic. Same-day service available.

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Since 2016

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A Houston Team Built Around Heat Pump Diagnostics Since 2016

75 Degree AC delivers AC Heat Pump Repair for homeowners and light commercial properties with licensed, hands-on experience on both the heating and cooling sides of every system. Heat pump diagnostics are part of our daily workload, which means faults like reversing valve issues, defrost failures, and mode-switching problems are identified faster and repaired correctly the first time.

Heat pumps have to be checked in both heating and cooling mode because the system behaves differently in each one. Our contractors test defrost sequencing, reversing valve operation, and refrigerant movement across both modes so the actual fault is identified before any repair is recommended.

Heating and Cooling Failures We Diagnose and Fix

Heat pumps fail in ways that standard air conditioners do not. The reversing valve, defrost cycle, and dual-mode operation create failure points that require specific diagnostic training. Here are the most common heat pump problems we repair.

Heat Pump Not Heating the Home

When the system runs in heat mode but only delivers cool or lukewarm air, the reversing valve, refrigerant charge, or defrost controls are the most likely culprits. Our contractors test each component and restore proper heating output.

Heat Pump Not Cooling in Summer

A heat pump that runs but will not cool behaves like a failed AC. Low refrigerant, dirty coils, a stuck reversing valve, or a failed capacitor are the usual causes. A full diagnostic covers electrical, refrigerant, and airflow before the repair begins.

Reversing Valve Failure

The reversing valve switches refrigerant flow between heating and cooling. When it sticks or fails, the system gets locked in one mode or produces lukewarm air in both. We test the solenoid and valve pressure to confirm the fault before replacing.

Heat Pump Icing Up in Winter

Light frost on the outdoor unit is normal. Heavy ice that does not clear means the defrost cycle has failed. A faulty defrost board, thermostat sensor, or refrigerant issue can prevent defrost from running, and the ice puts strain on the compressor.

Heat Pump Compressor Not Starting

The fan runs but nothing heats or cools. Clicking sounds at startup usually point to a failed capacitor, worn contactor, or electrical fault. We test the compressor and surrounding components and tell you honestly whether repair or replacement makes more sense.

How to Tell Your Heat Pump Needs Professional Service

Heat pump problems usually show warning signs before a complete failure. Some affect one mode, some affect both, and others show up as unusual sounds or ice buildup. Catching these early can help you avoid a larger breakdown and a more expensive repair. Here are common signs it is time to schedule AC Heat Pump Repair in Houston, TX.

Why Choose Us

Why Choose 75 Degree AC for Central AC Repair in Houston?

Licensed, Insured & Certified Technicians

Every contractor on your central AC repair job is state-licensed and EPA-certified. We carry full liability insurance on every call. Your system is handled by someone who knows what they are doing.

Upfront Pricing With No Hidden Fees

You see the central air conditioner repair cost before a single tool comes out. No surprise charges, no add-ons after the fact. The number we give you is the number you pay.

Same-Day Central AC Repair Service

We offer same-day central AC repair so your home is not stuck in the heat longer than it has to be. Call us in the morning and we work to get a contractor to your door that same day.

10 Years Serving Houston Accountability

75 Degree AC has been repairing central AC systems in Houston for over 10 years. We are locally owned, not a franchise operation. We stand behind every repair we complete.

What Happens During a Heat Pump Service Call

Schedule Your Heat Pump Service Call

Call or book online. Let us know the symptoms: not heating, not cooling, ice on the unit, noise, or anything else you are seeing.

Diagnose Both Heating and Cooling Modes

Our contractor tests the heat pump in both heating and cooling mode. Refrigerant pressures, reversing valve operation, defrost controls, and electrical components are all tested with meters.

Get the Diagnosis and Price Before Work Starts

Once the fault is isolated, we explain it in plain terms: what failed, why it happened, and what it takes to fix it. The flat-rate price lands before a single repair tool comes out.

Repair With Manufacturer-Grade Parts

Using manufacturer-grade parts matched to your brand and model, the contractor completes the repair on-site. Most heat pump jobs wrap up in a single visit without needing a second trip.

Test Both Modes & Performance Check

The system is tested in cooling mode and then switched to heating mode. Refrigerant pressures, airflow, and thermostat communication are all verified.

Our Recent Projects in Houston

Business Hours

Monday 7:00 AM – 9:00 PM

Tuesday 7:00 AM – 9:00 PM

Wednesday 7:00 AM – 9:00 PM

Thursday 7:00 AM – 9:00 PM

Friday 7:00 AM – 9:00 PM

Saturday 8:00 AM – 8:00 PM

Sunday 8:00 AM – 5:00 PM

How Your Heat Pump System Heats and Cools Your Home

A heat pump does not generate heat by burning fuel. Instead, it moves heat from one place to another. In cooling mode, it works like a standard air conditioner, pulling heat out of your home and releasing it outside. In heating mode, it reverses the process, extracting heat energy from the outdoor air and moving it inside, even when temperatures are cool.

The reversing valve is the key component that makes this mode switch possible. Refrigerant flows through the system in opposite directions depending on whether the heat pump is heating or cooling. The compressor drives the refrigerant through the circuit, the indoor coil exchanges heat with the air inside your home, and the outdoor coil exchanges heat with the outside air.

What Parts Of Houston Does 75 Degree AC Serve?

75 Degree AC provides HVAC services across Houston TX, supporting residential and light commercial properties throughout the city. Our service coverage reflects how HVAC demand actually works in Houston, from central neighborhoods to outer city districts. Customers rely on us for consistent service standards, clear communication, and dependable system support city-wide.

Downtown

East Downtown (EaDo)

Westwood

Midtown

Spring Branch (Central, TX)

University Place

Montrose

Gulfton

Meyerland

The Heights

Westbury

Eastwood

River Oaks

Memorial

Harrisburg / Manchester

Third Ward

Lazybrook / Timbergrove

Spring Branch (East Houston)

South Belt / Ellington

Trinity / Houston Gardens

Clear Lake (Houston City Portion)

Richmond

Katy, TX

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About Houston, TX

Houston, TX is one of the most influential cities in the United States, known for its size, diversity, and global industries. As the fourth-largest city in the country, Houston plays a major role in energy, healthcare, aerospace, and international trade. The city’s warm subtropical climate means air conditioning is not a seasonal luxury but a year-round necessity for every household and business. The city is known for its cultural diversity. More than 145 languages are spoken across Houston, and that diversity shows up in its neighborhoods, communities, and restaurants. Areas like The Heights, Midtown, Montrose, and the Galleria corridor each have their own distinct character, yet all share the same demand for reliable, affordable cooling throughout Houston’s long summer season. Houston also covers a massive geographic area, with neighborhoods spread across hundreds of square miles. Because the city has no traditional zoning laws, historic homes, modern developments, and commercial properties sit side by side across every part of the metro. 75 Degree AC serves all of these areas with the same standard of licensed, insured, and professional HVAC service.

How Much Does AC Heat Pump Repair Typically Cost in Houston?

AC Heat Pump Repair costs in Houston typically range from $150 to $700 for most common issues including refrigerant recharges, capacitor replacements, or reversing valve repairs. More involved repairs such as compressor replacement will run higher. We provide the exact repair price before any work begins.

Why Is My Heat Pump Blowing Cold Air When the Heat Is On?

A heat pump blowing cold air in heat mode is almost always caused by a stuck or failed reversing valve, low refrigerant, or a problem with the defrost cycle. In some cases, the system is stuck in cooling mode and cannot switch. A proper diagnostic tests each component before recommending any repair.

What Does It Mean When My Heat Pump Runs But Does Not Cool?

A heat pump running without cooling usually points to low refrigerant, a dirty evaporator coil, a stuck reversing valve, or a failed capacitor. The system needs a diagnostic that covers both modes because the fault may affect heating performance as well.

What Is the Average Lifespan of a Heat Pump System in Houston?

Most heat pumps last between 10 and 15 years with regular maintenance. The long cooling season and high humidity in this climate put extra wear on the system. Annual professional servicing and filter changes help heat pumps reach and exceed their expected lifespan.

What Are the Most Common Problems With Heat Pump Systems in Houston?

The most common heat pump problems are refrigerant leaks, failed capacitors, reversing valve faults, and dirty or clogged coils that restrict airflow. Dirty coils and low refrigerant account for a large share of service calls. Regular maintenance prevents most of these issues.

Why Is My Heat Pump Covered in Ice During Winter?

Light frost on the outdoor unit is normal and clears automatically through the defrost cycle. Heavy ice that does not melt usually means the defrost board, thermostat sensor, or refrigerant charge has a problem. Running a heat pump with heavy ice buildup can damage the compressor and should be addressed quickly.