The short answer
Most mini split repairs in Northern Virginia come down to a short list: a clogged drain or pump, dirty filters and coils, a fan motor, a temperature sensor, a control board or its wiring, and less often a refrigerant leak or a compressor. Most get fixed in one visit. Before you call, check the mode, the remote batteries, the filters and the breaker, and write down any code on the display. A tech who knows the code and the model number walks in with the right part in mind.
What breaks on a mini split
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| What failed | What you notice | How it usually goes |
|---|---|---|
| Drain line or condensate pump | Water dripping from the head, or a drain code | Clear the line or replace the pump. One visit. More in mini split condensate pump |
| Dirty filters, coil or fan | Weak air, a sour smell, a whistle, ice on the coil | Filters are yours. The coil and fan are a tech’s job: how to clean a mini split |
| Indoor or outdoor fan motor | No air from the head, or grinding or squealing outside | A new motor. An ordinary repair |
| Temperature sensor | A sensor code, or a head that shuts off early or runs nonstop | Tested, then replaced. An ordinary repair |
| Control board or wiring | A dead display, a communication code, blinking lights | Tested with a meter first. A board is a bigger part, priced before it’s ordered |
| Refrigerant leak | Heat or cooling that fades over weeks, ice on the lines, a steady hiss | Found, repaired, then charged by weight. Never just a top off: mini split refrigerant leak |
| Compressor | The outdoor unit hums or clicks and won’t start, or a loud bang | A major repair. On an older system, this is where replacing comes up |
The $67 Heating Check
We check your furnace, heat pump or boiler before winter. Through December 31. See the offer
Check these before you call
- The mode: Cool for cooling, Heat for heat. Auto and Dry act differently.
- The remote batteries, and that the remote and the head agree on the mode.
- The filters behind the front panel. A clogged pair can make a working system look broken.
- The breaker or the disconnect box for the outdoor unit.
- Snow, leaves or ice packed around the outdoor unit.
- Three minutes after a restart. Daikin, Mitsubishi Electric and LG all hold the compressor off that long on purpose.
Own a Daikin? Its own checks and built-in waits are in Daikin mini split not cooling or heating.
One reset, not ten. Turn the head off with the remote, switch the breaker off for about 5 minutes, then turn it back on. If the same code comes back, write it down with the model number from the label and call. Resetting a fault over and over can hide what it was protecting.
Write down the code
A code or a blinking pattern is the system telling you which part it’s unhappy with. Write it down with the model number from the label on the side of the head, and take a short video if the lights blink. Brand by brand: Mitsubishi, Carrier, Daikin, Fujitsu, LG, Samsung and MrCool, Pioneer, Gree and Senville. Every code family we’ve written up is on our error codes and warning lights page.
What a repair visit looks like
A mini split visit starts with our $99 diagnostic. The tech reads the code, tests the part it points to with a meter or gauges, and tells you what failed and why. You get the repair price in writing before anything is opened. Sensors, a drain pump and a fan motor are ordinary repairs on a mini split, and most get fixed in one visit. A board or a compressor may need a part ordered, and you’ll know that before you agree to anything.
If it turns out to be refrigerant, the leak gets found and fixed before any refrigerant goes in. Adding refrigerant to a leaking system just buys a few weeks.
Repair or replace
Most mini split repairs are worth doing. A newer system with one failed part should get fixed. Replacing starts to make sense with a failed compressor on an older system, a second refrigerant leak, or a system that still runs on R-22, the old refrigerant that stopped being made in 2020. If the system is old enough that a new one makes more sense, it’s $1,500 off a new system, ductless mini split included, and the estimator shows prices with it already taken off. Best mini split brands and ductless mini split cost cover the next step, and our ductless page shows how we install them.
Match what you’re seeing
- Water from the head: mini split leaking water.
- Cold air in heat mode: mini split not heating, and for a pause with steam outside, mini split defrost mode.
- Warm air in cool mode: mini split not cooling.
- Grinding, squealing or buzzing: mini split making noise.
- A ducted heat pump instead: heat pump repair.
Book it
A mini split visit starts with our $99 diagnostic, and you get the repair price in writing before anything is opened. Call (703) 997-9757 or book a visit online and tell us the brand and the code or what you’re seeing. Rated 5.0 stars across 1,138 reviews on Google, Angi, Yelp, the BBB and Facebook, Virginia Class A license 2705192276.
Mitsubishi Electric, Carrier, Daikin, Fujitsu, LG, Samsung, MrCool, Pioneer, Gree and Senville are trademarks of their owners.
Questions people ask
How much does mini split repair cost?
It starts with our $99 diagnostic, and the repair price comes in writing before any work. A sensor, a drain pump or a fan motor is an ordinary repair. A board or a compressor costs more, and you’ll know the number first.
Is it worth repairing a mini split?
Usually. Most repairs are one part and one visit. Replacing starts to make sense with a failed compressor on an older system, a second refrigerant leak, or a system that still runs on R-22.
Why did my mini split suddenly stop working?
Check the mode, the remote batteries, the breaker and the filters first. If the display shows a code or blinks, write it down. A sudden stop with a code usually points to one part.
How do I reset a mini split?
Turn it off with the remote, switch the breaker off for about 5 minutes, then back on. If the same code comes back, call instead of resetting it again.
What should I tell the tech when I call?
The brand, the model number from the label, any code or blinking pattern, and what it’s doing. A photo of the display helps.
