Not Cooling
Running without bringing the temperature down.
Katy, Texas · AC diagnostics & repair
AC Repair in Katy, TX
AC not cooling, blowing warm air, leaking water, freezing up, or tripping a breaker? APCA AC and Heating Repair provides professional HVAC diagnostics and AC repair throughout Katy, Texas.
We service central air conditioners, heat pumps, air handlers, furnaces, controls and ductless systems from major HVAC brands. Our technicians focus on finding the actual cause of the failure before recommending the repair.
Ask about same-day appointment availability.
Texas HVAC License: TACLB00140502E
- Texas Licensed HVAC Contractor
- Professional Diagnostics
- Major HVAC Brands
- Katy & West Houston Service Area
Start with the symptom
What is your AC doing?
You do not need to know which part failed. Tell us what you notice.
Warm Air
Air from the vents feels warmer than it should.
Frozen Coil
Ice on the indoor coil or refrigerant line.
Water Leak
Water around the air handler or drain pan.
Electrical / Breaker
A system that trips or will not start.
Refrigerant Leak
Cooling loss that needs a cause identified.
Fan / Motor
A fan that stops, struggles, or makes noise.
Compressor / Major Repair
Help assessing a major equipment failure.
Find the cause first
Fast Diagnosis for AC Problems in Katy
When an air conditioner stops cooling, replacing a part without confirming the cause can turn into repeat repairs. APCA approaches each service call as a diagnosis first.
We check the system based on the symptoms and equipment involved, which may include thermostat operation, airflow, electrical components, temperature split, drain safety controls, refrigerant conditions, motors and compressor operation.
Once the problem is identified, we explain the repair options before moving forward.
No cooling right now? Call APCA at (832) 906-4822.Learn more about our AC repair service.
From controls to compressors
AC Problems We Repair
AC not cooling
A running system can still have an airflow, control, electrical, or refrigerant problem. We test the equipment to narrow down the cause.
AC blowing warm air
We check thermostat calls, indoor airflow, and outdoor-unit operation to understand why the system is not removing heat.
Frozen evaporator coil
If the coil is visibly frozen, turn cooling off and schedule a diagnosis. Restricted airflow and refrigerant problems can both cause icing.
AC leaking water
A blocked drain, drain-pan problem, or safety-control issue can cause water around the system. We inspect drainage and related components.
Capacitor / contactor
Failed starting or switching components can prevent equipment from running. A technician tests electrical components before recommending replacement.
Condenser fan / blower motor
Motor trouble can affect both heat removal and indoor airflow. We check the motor, its controls, and operating conditions.
Thermostat / low-voltage controls
Incorrect calls, damaged wiring, and control faults can interrupt cooling. Diagnosis follows the control sequence for your system.
Refrigerant leak / low refrigerant
Low refrigerant requires determining why the charge is low. We assess possible leaks and repair options rather than treating a refill as the solution.
Compressor / breaker
Repeated breaker trips can signal a serious electrical or equipment fault. Leave the system off and arrange service; do not repeatedly reset the breaker.
Airflow / hot-room problems
Uneven temperatures can involve filters, blowers, ductwork, or system design. We evaluate airflow and the equipment serving the affected rooms.
Know what to expect
What Happens During an APCA AC Repair Visit
Tell us what the system is doing
Share the symptoms, when they started, and your service address.
We inspect and test the system
The checks follow your symptoms and the equipment installed.
We identify the likely cause
We explain the findings and any additional testing needed.
You approve the repair
Review the proposed work and repair options before we proceed.
We verify system operation
After the repair, we check operation and discuss any remaining concerns.
AC trouble? Let’s talk through it.
Ask about same-day appointment availability.
Make an informed decision
Repair or Replace Your AC?
The right next step depends on the whole system, not just the failed part.
Repair may make sense when
- The system is otherwise in good condition.
- The failure is isolated.
- The required part is available.
- There is no pattern of repeated major problems.
- The repair cost is reasonable relative to equipment condition.
Replacement deserves consideration when
- Refrigerant leaks keep returning.
- The compressor or a major coil has failed.
- Several expensive components are deteriorating.
- An older system has poor efficiency.
- System design or sizing contributes to the problem.
Explore the 2026 Houston AC replacement cost guide, or learn about our AC replacement service, or review our dedicated AC replacement guide for Katy.
APCA AC and Heating Repair
Why Katy Homeowners Call APCA
Learn more about APCA and how we approach service.
Licensed HVAC contractor
Texas HVAC License: TACLB00140502E.
Diagnosis before recommendation
We explain what testing shows before recommending work.
Technical experience across the system
Refrigeration, electrical components, controls, motors, airflow and equipment all matter to the diagnosis.
Service + equipment knowledge
Repair findings help inform practical equipment and replacement decisions.
Residential and broader HVAC experience
We work with homeowners, businesses and property-management teams.
Equipment knowledge
AC Brands and Systems We Service
Tell us your equipment make and model when you request service.
- Goodman
- Daikin
- Trane
- Lennox
- Carrier
- Bryant
- Rheem
- Ruud
- York
- Amana
- Mitsubishi
- Samsung
- Central split AC
- Heat pumps
- Furnace/AC combinations
- Air handlers
- Ductless mini-splits
- Conventional and communicating controls
Related services: AC maintenance, heating repair, and ductwork and airflow.
Katy & West Houston
AC Service Across the Katy Area
Katy homes include everything from established neighborhoods to large master-planned communities and newer high-efficiency systems. Service calls can range from a failed capacitor on a standard split system to airflow problems in a two-story home, communicating controls, refrigerant leaks, motor failures or full equipment replacement decisions.
Neighborhoods we serve
- Old Katy
- Cinco Ranch
- Grand Lakes
- Seven Meadows
- Firethorne
- Cane Island
- Elyson
- Katy Mills area
ZIP codes
77449 · 77450 · 77493 · 77494
Share your service address so we can confirm scheduling for your location.
Your AC repair questions
AC Repair in Katy: Frequently Asked Questions
Ask about same-day appointment availability. Scheduling depends on current appointments, your location, the diagnosis, and any parts needed. Call (832) 906-4822 to discuss availability.
Check that the thermostat is set to cooling and below room temperature. Look at an accessible filter for obvious buildup and make sure supply and return vents are unobstructed. Do not open electrical panels or handle refrigerant lines. Tell us about any ice, water, or unusual noise.
Possible causes include restricted airflow, a control problem, a fan or compressor fault, or a refrigerant leak. Testing helps distinguish these problems so the recommended repair addresses the cause.
Yes. Turn cooling off at the thermostat and schedule a diagnosis. Do not chip away ice. Airflow restrictions and refrigerant problems can both cause a coil to freeze.
APCA can diagnose equipment and electrical problems associated with repeated trips. Leave the system off and do not repeatedly reset the breaker. The repair depends on what testing identifies.
We service major HVAC brands, including Goodman, Daikin, Trane, Lennox, Carrier, Bryant, Rheem, Ruud, York, Amana, Mitsubishi, and Samsung. Share your model when booking so we can discuss equipment-specific requirements and parts availability.
We diagnose suspected refrigerant leaks and explain repair options. A low charge needs a cause identified; adding refrigerant alone does not resolve an active leak. Component condition and leak location affect the recommendation.
Consider equipment condition, repair history, efficiency, and the scope of the failure. An isolated repair may be practical; repeated leaks, major compressor or coil damage, and several deteriorating components can make replacement worth considering.
Yes. APCA offers preventive HVAC maintenance in the Katy area. Ask about scheduling and the maintenance needs of your equipment when you call.
Call APCA AC and Heating Repair at (832) 906-4822, or send a service request using the form below. Texas HVAC License: TACLB00140502E.
Tell us what’s happening
Request AC Service in Katy
Send your symptoms and service address. APCA will follow up using your preferred contact method to discuss scheduling.
For availability, call (832) 906-4822.
Texas HVAC License: TACLB00140502E
Get help with your AC in Katy.
Call APCA or send your service request. Ask about same-day appointment availability.