How to Repair an Inverter AC?
August 16, 2025
An inverter AC is designed for efficiency. Unlike conventional air conditioners that turn the compressor on and off, inverter systems adjust the compressor’s speed based on cooling demand. This results in less power consumption and more consistent indoor temperatures.
But when your inverter AC malfunctions, repairing it isn’t always straightforward. Some issues can be fixed at home, while others require professional servicing. Knowing the difference can save time, money, and unnecessary stress.
This guide will explain how to repair inverter AC units step by step, including common problems, troubleshooting methods, and when to call an expert.
Understanding How an Inverter AC Works
Before jumping into repairs, it helps to know the main components that keep your system running:
- Compressor – Adjusts speed instead of turning on and off, making the AC more efficient.
- Inverter PCB (Printed Circuit Board) – The “brain” of the system that controls compressor speed and energy use.
- Indoor Unit – Includes the evaporator coil, fan, and filters.
- Outdoor Unit – Houses the compressor, condenser coil, and fan.
- Sensors & Thermostat – Monitor room conditions to regulate cooling.
Because inverter ACs are more advanced, repairs often involve both electrical and mechanical parts, which is why handling them requires extra care.
Common Problems with Inverter ACs
Not every AC issue means a major breakdown. Here are the most frequent inverter AC problems homeowners face:
1. Cooling Performance Issues
- The room doesn’t reach the set temperature.
- The AC runs continuously but struggles to cool.
Possible Causes:
- Dirty air filters blocking airflow.
- Refrigerant leakage.
- Faulty thermostat or temperature sensor.
2. Unusual Noises
- Clicking, buzzing, or rattling noises during operation.
Possible Causes:
- Loose parts.
- Fan motor problems.
- Issues in the compressor or outdoor unit.
3. Water Leakage from the Indoor Unit
- Water dripping on the walls or floor.
Possible Causes:
- Blocked or disconnected drainage pipe.
- Frozen evaporator coils.
4. AC Not Turning On
- The system fails to start despite having power.
Possible Causes:
- Tripped circuit breaker.
- Faulty inverter PCB.
- Blown fuse or wiring issue.
5. Error Codes Displayed on the Panel
Many inverter ACs display error codes when something goes wrong. Each manufacturer defines its codes, but common errors may point to sensor failure, PCB issues, or refrigerant problems.

Step-by-Step Troubleshooting for Homeowners
While some repairs are best left to professionals, you can try basic troubleshooting to rule out simple issues:
Step 1: Check the Power Supply
- Ensure the unit is plugged in properly.
- Check the circuit breaker for tripping.
- Reset the breaker if needed.
Step 2: Clean or Replace Air Filters
- Dirty filters reduce airflow and cooling efficiency.
- Remove the filter, wash it with mild detergent, dry it, and reinstall.
Step 3: Inspect the Outdoor Unit
- Make sure there’s no dirt, debris, or leaves blocking the condenser fan.
- Clear the area around the unit for proper airflow.
Step 4: Reset the AC
- Many inverter ACs have a reset button on the remote or the indoor unit.
- Resetting may solve temporary electronic glitches.
Step 5: Check for Error Codes
- Refer to the AC manual to understand the meaning of error codes.
- If it indicates a serious issue (like compressor or PCB failure), call a technician.
Repairs That Require Professional Help
Some inverter AC repairs are not safe or practical for homeowners. These include:
- Refrigerant Recharge or Leak Repair – Requires proper tools and licensed handling of refrigerants.
- PCB (Circuit Board) Replacement – A faulty PCB needs professional diagnosis and replacement.
- Compressor Repair or Replacement – Since this is the heart of the AC, handling it incorrectly can cause permanent damage.
- Electrical Wiring Issues – Miswiring can lead to short circuits or fire hazards.
For these types of issues, contacting Done Deal A/C & Heating Katy is the safest and most effective solution.
Preventive Maintenance Tips for Inverter ACs
Proper maintenance reduces the chance of costly repairs. Here’s what you can do:
- Regular Cleaning
- Clean air filters every 2–4 weeks.
- Wipe the indoor unit and check for dust buildup.
- Clean air filters every 2–4 weeks.
- Annual Professional Servicing
- Schedule a yearly tune-up to inspect refrigerant levels, coils, and PCB performance.
- Schedule a yearly tune-up to inspect refrigerant levels, coils, and PCB performance.
- Proper Usage Habits
- Avoid setting the thermostat too low.
- Keep doors and windows closed while running the AC.
- Avoid setting the thermostat too low.
- Monitor Energy Consumption
- A sudden spike in electricity bills may indicate a hidden problem.
How Long Does an Inverter AC Last After Repairs?
With regular maintenance and timely repairs, an inverter AC can last 10–15 years. The compressor and PCB are the most sensitive parts, and their condition determines how long the system will continue to operate efficiently.
If repairs become frequent and costly, replacing the unit may be more cost-effective. A technician from Done Deal A/C & Heating Katy can guide you on whether repair or replacement makes more sense.

Why Choose Done Deal A/C & Heating Katy for Inverter AC Repairs Near Cinco Ranch Bayou Park Estates?
When dealing with inverter AC issues, expertise matters. At Done Deal A/C & Heating Katy, we specialize in diagnosing and repairing inverter systems with precision. Here’s why homeowners in Katy trust us:
- Fast Response Times – We know how uncomfortable a malfunctioning AC can be in Texas heat.
- Certified Technicians – Our team is trained to handle inverter AC components safely.
- Transparent Pricing – No hidden fees; you’ll always know the cost upfront.
- Complete Services – From filter cleaning to compressor replacement, we cover all repair needs.
- Local Reliability – As a trusted name in Katy, we’re committed to providing dependable service to our community.
Fast & Reliable Emergency AC Repair Near Me in Cinco Ranch Bayou Park Estates
When your air conditioner breaks down in the middle of a Texas summer, waiting isn’t an option. You need a team that shows up fast, fixes the problem right the first time, and restores comfort to your home without delay. That’s exactly what you get with Done Deal A/C & Heating Katy—your trusted choice for emergency AC repair near Cinco Ranch Bayou Park Estates.
Why Homeowners in Cinco Ranch Trust Done Deal A/C & Heating Katy
Rapid Response Times – We know how urgent AC problems can be. Our technicians are on standby to get to you quickly, minimizing downtime.
Expert Technicians – From inverter systems to traditional central AC units, we have the training and experience to handle complex repairs.
Transparent Pricing – No hidden charges, no surprise bills—just honest, upfront estimates before any work begins.
Comprehensive Solutions – Whether it’s a faulty compressor, refrigerant leak, or electrical issue, we diagnose the problem thoroughly and repair it correctly.
Local & Dependable – As a Katy-based company, we take pride in serving our neighbors in Cinco Ranch Bayou Park Estates with reliability and care.
Don’t Wait—Restore Comfort Now
A broken air conditioner can turn your home into a sauna in no time. Don’t let the heat take over. Call Done Deal A/C & Heating Katy for fast, dependable emergency AC repair near Cinco Ranch Bayou Park Estates.
We’ll get your system back up and running—so you can enjoy cool, refreshing comfort again.
Done Deal A/C & Heating Katy Serving the Cinco Ranch Bayou Park Estates Community and Beyond in Katy
Done Deal A/C & Heating Katy is dedicated to serving the diverse needs of the local community of Katy, including individuals residing in neighborhoods like Cinco Ranch Bayou Park Estates. With its convenient location near landmarks such as Jeanne Coleman Support Annex – Katy ISD and major intersections like Mason Rd & University Park (coordinates: 29.726927769122867, -95.75953266084673), we offer emergency ac repair near me Katy TX services.
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Final Thoughts
Repairing an inverter AC requires a mix of basic homeowner troubleshooting and professional expertise. While you can handle simple steps like cleaning filters, checking power supply, and resetting the system, major issues such as refrigerant leaks, PCB damage, or compressor failure demand professional attention.
If your inverter AC isn’t performing as it should, don’t wait until the problem gets worse. Contact Done Deal A/C & Heating Katy for expert diagnosis and fast repair. With the right care, your inverter AC will continue delivering comfort and efficiency for years to come.
FAQs
1. How do I know if my inverter AC needs repair or just maintenance?
If your AC is still cooling but less efficiently, it may only need cleaning and maintenance. However, if it’s making unusual noises, leaking water, showing error codes, or not cooling at all, it likely requires repair.
2. Can I repair my inverter AC myself?
Homeowners can handle basic troubleshooting like cleaning filters, checking the power supply, or resetting the unit. But complex issues such as refrigerant leaks, compressor problems, or PCB damage should be left to professionals.
3. Why is my inverter AC running but not cooling properly?
Common reasons include dirty air filters, blocked outdoor units, low refrigerant, or faulty sensors. Cleaning and basic checks can help, but if the issue continues, you should contact a technician.
4. How often should I service my inverter AC to avoid costly repairs?
It’s recommended to clean filters every 2–4 weeks and schedule professional servicing once a year. Regular maintenance extends the lifespan of your AC and reduces repair needs.
5. Who should I call for inverter AC repair in Katy?
For fast, reliable service in Katy, Done Deal A/C & Heating Katy is the go-to company. Our expert technicians handle everything from minor troubleshooting to major inverter AC repairs.
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