AC Repair & Service in Greater Houston
When your air conditioning breaks down—especially during a Texas heat wave—you need fast, accurate diagnosis and reliable repair. LMH Services responds quickly with certified technicians who diagnose the problem, explain your repair options, and get your system cooling again. We handle everything from minor refrigerant leaks to major compressor failures.
Get a Free Estimate
Request service, book online, get a free estimate, ask about financing, or schedule routine maintenance.
Schedule Your Service For urgent issues, calling 832-800-4564 is the fastest way to reach us.
What Sets Our AC Repair Service Apart
Expert Diagnostic Skills That Find the Real Problem
A broken AC is a symptom, not a diagnosis. Our technicians don’t guess or recommend blanket replacements. We use diagnostic tools (manifold gauges, electrical testers, thermometers, superheat/subcooling measurements) to pinpoint the exact failure. Is the compressor not starting because of a bad capacitor or because refrigerant pressure is too low? Did the coil freeze because of airflow restriction or because of low charge? Our diagnosis guides every repair decision, saving you money on unnecessary parts.
Honest Repair-vs-Replace Recommendations
Some companies profit by replacing systems that could be repaired. We evaluate the economics honestly. Is the compressor failed on a 15-year-old system with high repair costs? Replacement might make sense. Is it a 5-year-old system with a blown capacitor or a small refrigerant leak? Repair is the smart choice. We present the total cost of ownership (repair cost now vs. new system cost later) so you decide based on facts, not sales pressure.
Armstrong and Samsung Equipment Knowledge
We know the systems we service. Armstrong and Samsung equipment has known failure modes, common parts that wear out, and specific troubleshooting steps. Our technicians have experience across both brands and understand how to diagnose and repair them reliably.
Fast Response and Emergency Service
AC failure in summer is urgent. We offer same-day service and emergency availability—we know that heat affects families with elderly members, young children, and health vulnerabilities. We respond to after-hours calls and weekend emergencies because cooling is essential, not optional.
Transparent Pricing and Service Warranty
Before we begin repair work, we explain what’s wrong, what the repair costs, and what warranty coverage applies. No surprises at the end. Our repairs are warranted for 1 year, so if a repaired component fails due to our work, we fix it at no additional charge.
Proud Members of Our Local Chambers of Commerce
What Houston-Area Homeowners Say
How We Diagnose and Repair Your AC System
From the first phone call to the final system test, every step is documented and done to code — so your repair lasts and your system performs reliably.
When you call, we ask: What’s the symptom (no cooling, noise, leaking, cycling)? How long has it been happening? Is it an emergency (dangerous heat affecting vulnerable family members)? What’s the age and type of your system? This intake shapes our response time and what tools we bring to the appointment.
For emergencies, we prioritize same-day dispatch. For scheduled appointments, we arrange a convenient time and review your system’s history if you’ve had prior service with us.
Our technician arrives and begins with a visual assessment: Is the outdoor unit running? Are vents clean? Is the indoor filter visibly dirty? They then connect manifold gauges (low-side and high-side pressure gauges) to your AC system to measure refrigerant pressure.
Pressure readings are the foundation of AC diagnosis. Normal operating pressure varies by system design and outdoor temperature, but the gauges show whether pressure is too high (indicating overcharge or blockage), too low (indicating leak or undercharge), or normal. A low-side pressure reading that’s abnormally low immediately points toward refrigerant leak or blocked metering device.
Pressure alone isn’t enough. We measure superheat on the low-side line and subcooling on the high-side line. These calculations tell us whether the refrigerant charge level is correct, too high, or too low.
- Superheat too high? The low-side pressure is too low—refrigerant is undercharged, or there’s an internal metering device restriction (expansion valve stuck).
- Superheat too low? Refrigerant is overcharged, or there’s liquid backing up to the suction line.
- Subcooling wrong? The high-side pressure or charge is off.
This data is the diagnostic gold standard. It eliminates guesswork.
We test capacitors (most common failure point), compressor windings, contactor coil, and fan motors using multimeters and capacitance testers. Bad capacitors are often the culprit in a system that won’t start or cycles with difficulty. A failed capacitor is a cheap, quick repair.
If electrical components test good, we check compressor continuity and winding resistance to determine whether the compressor itself has failed internally. Compressor failure is expensive and often drives a replacement decision.
We inspect the indoor evaporator coil visually and feel for cold spots (indicating proper refrigerant circulation). We check the outdoor condenser coil for dirt, leaves, or ice. We verify that return air is flowing freely—no blocked filter, no closed vents.
Frozen coils, dirt-clogged condenser, or blocked returns are straightforward to address. Weak cooling from poor airflow is a repair that prevents future problems and improves efficiency.
If pressure readings suggest a leak, we use electronic leak detectors to scan refrigerant lines, connections, and the condenser coil. We identify the leak location (outdoor line connection, indoor coil joint, outdoor coil, valve) so we can determine the repair scope.
Small leaks in accessible locations (like a line fitting) are quick solders. Leaks inside a compressor or deep within a coil are more serious and may drive a replacement decision.
Once testing is complete, our technician explains the findings clearly: “Your low-side pressure is reading 45 PSI when it should be 65 PSI on a day like today. We found a slow leak in the outdoor liquid line at the connection point. Your compressor and other components test fine. The repair is a solder fix on the line connection plus a refrigerant recharge—about [cost]. Alternatively, if you’d prefer a new system for warranty peace of mind, that would be [price]. Either way, you’re back to full cooling.”
We don’t pressure you to choose immediately. We answer questions and give you time to decide.
Once approved, we proceed with the repair. This may include:
- Soldering refrigerant line leaks — We purge nitrogen, solder the connection, braze if necessary, pressure-test the repair, evacuate (remove air and moisture), and recharge with precise refrigerant amount.
- Capacitor replacement — Quick swap, verify compressor starts, test cooling.
- Valve or expansion device replacement — Requires refrigerant evacuation and recharge.
- Electrical repairs — Replace contactor, fan motor, or other components as needed.
All work follows EPA regulations for refrigerant handling and recovery.
After repair, we run the system through a full cooling cycle. We verify pressure readings are correct, superheat and subcooling are in spec, coil temperature is cold, and the thermostat cycles the system normally. We confirm that cooling output matches your home’s needs and that the system is no longer cycling or making noise.
We explain what we fixed, why it failed, and what maintenance or usage habits prevent future occurrences. We discuss whether regular maintenance can catch similar issues early. If your home’s cooling is still inconsistent after AC repair, we evaluate your furnace or heat pump systems and ductwork—sometimes the AC is working fine but your entire system needs optimization.
Your AC Needs Repair
Don’t wait for the system to fail completely. If your cooling is weak, making noise, leaking, or cycling on and off frequently, contact us for diagnosis.
Financing Your AC Repair
Major AC repairs shouldn’t strain your budget. LMH Services partners with Wisetack for flexible financing, so you can get your cooling fixed and pay over time.
Financing Benefits
LMH Services has partnered with Wisetack to give you more ways to pay. Wisetack lets you check your options in seconds with no impact to your credit score, and offers simple monthly payment plans without the financial stress.
Keep Your System Running Strong with a Maintenance Plan
Prevent future AC breakdowns. A maintenance plan from LMH Services catches problems early—low refrigerant, worn capacitors, dirty coils—before they cause expensive emergency repairs.
Our Maintenance Plans Include
24 Hour Service Available
Plan members get priority access to our 24/7 emergency service line
Prompt, Local Service
We are locally operated in Deer Park and respond quickly
Expert Technicians & Installers
Thorough inspections that catch small issues before they become expensive repairs
Residential & Commercial
Plans tailored to homeowners and business owners alike
AC Repair Across Greater Houston
LMH Services provides fast AC repair throughout the greater Houston area from our home base in Deer Park, TX. Wherever you are in our service area, you get the same expert diagnosis, honest recommendations, and warranty-backed repairs.
Serving Communities Around:
Not Sure If We Service Your Area?
Chances are we can help! We’ve served the southern Houston area for a while, so please call 832-800-4564 or contact us today to see if we come out to your area.
AC Repair Questions Homeowners Ask
For emergencies, we prioritize same-day dispatch. For non-emergency repairs (system still cooling but making noise, weak cooling, occasional cycling), we schedule service within 24–48 hours. During peak summer demand, appointments may be slightly longer. Call us for availability.
Repair costs vary depending on the problem. A capacitor replacement might cost a few hundred dollars. A refrigerant leak repair could range from a few hundred to over a thousand, depending on leak location and refrigerant volume. A compressor replacement is more expensive. We diagnose first, then provide an estimate before you approve the repair.
This depends on system age, repair cost, and your preferences. If your system is under 10 years old and repair cost is less than 30–40% of a new system’s cost, repair usually makes sense. If it’s 15+ years old, repairs are becoming frequent and expensive—replacement might offer better long-term value.
Modern AC systems are sealed and shouldn’t lose refrigerant under normal operation. If pressure is low, there’s a leak—either small (tiny pinhole) or larger (failed connection, cracked coil). We locate and repair the leak, not just top off refrigerant.
Federal EPA regulations prohibit selling refrigerant to unlicensed individuals. DIY refrigerant is a common cause of overcharge and compressor damage. Always use a licensed professional for refrigerant work.
Ice or frost forms on refrigerant lines when evaporator temperature drops below 32°F. This happens from low charge, blocked airflow, or stuck metering device. Running a frozen system damages the compressor. Stop and call for repair immediately.
Simple repairs like capacitor replacement take 1–2 hours. Leak diagnosis and repair may take 2–4 hours depending on location. Compressor replacement or extensive electrical work may take a full day. We estimate during diagnosis.
Yes. We warranty our repair work for 1 year. If a component we repaired fails due to our work, we fix it at no additional charge. Manufacturer warranties on parts vary by brand; we provide documentation.
Some condensation is normal. If you see water pooling or leaking into your home, the condensation drain is probably blocked. We clear the drain and ensure proper drainage to prevent moisture damage.
If cooling is weak, short-term operation is okay. If the system is freezing up or making grinding noises, stop using it—continued operation can cause compressor failure. When in doubt, ask during the phone intake.
We use manifold gauges, superheat/subcooling measurements, and electrical testing to pinpoint the exact failure—not guess. Our diagnosis guides every repair decision, saving you money on unnecessary parts.
We evaluate the economics honestly and present total cost of ownership so you decide based on facts, not sales pressure. Sometimes repair makes sense; sometimes replacement offers better value.
AC failure in summer is urgent. We offer same-day service and emergency availability because cooling is essential, not optional—especially for families with vulnerable members.
Before we begin repair work, we explain what’s wrong, what the repair costs, and what warranty coverage applies. Our repairs are warranted for 1 year—no surprises at the end.
We know the systems we service. Our technicians understand known failure modes, common wear parts, and specific troubleshooting steps for reliable diagnosis and repair.