# Mini split repair in Washington, DC

> Mini split not cooling, not heating or dripping down the wall? We find the cause with readings first, then give you a written repair price before any part.

URL: https://roomwisedcminisplits.com/mini-split-repair/

Service

Find the cause, price the fix in writing, then repair it.

(771) 213-3105

Last Updated: November 11, 2026

Room by room

Each head sized from a heat-load calculation for its room

Tested

Pressure test and deep vacuum before any refrigerant moves

Drained

A drain path planned for every head before it is mounted

Permitted

A DC Department of Buildings mechanical permit on every install

[Roomwise DC Mini Splits](https://roomwisedcminisplits.com/) repairs ductless mini splits across the District: heads that drip down the plaster, systems that blow air but won’t cool, outdoor units that stop with a blinking light on a cold night. We find the cause first, and a part gets replaced only once the readings point to it.

## Check these before you call

A few faults turn out to be settings, filters or power. Two minutes with the remote and the filters can save you a visit.

- **Mode and setpoint.** In auto or dry mode the unit may not cool the way you expect. Set it to cool, a few degrees below the room.
- **Filters.** Lift the front panel. Clogged mesh filters cut airflow, and in cooling the coil can ice over.
- **The outdoor unit.** Leaves, snow or a cover blocking the coil starve it of air. Clear it.
- **Power.** If both units are dark, check the breaker and the disconnect box beside the outdoor unit.
- **A reset.** Switching off at the breaker for a few minutes clears some faults. If the same code comes back, [send us the details](https://roomwisedcminisplits.com/contact/).

## Things that look like faults but aren’t

Mini splits do a few things that alarm people in their first winter. These are normal and need no repair.

- **Heat stops for several minutes and the outdoor unit steams.** That’s a defrost cycle melting frost off the outdoor coil.
- **Water drips from the outdoor unit in cold weather.** It’s the melted frost, and it needs a place to drain.
- **The indoor fan slows or stops at the setpoint.** Inverter units throttle down, and some stop the fan once the room is satisfied.
- **A hiss or a click when the mode changes.** Refrigerant shifting and valves moving.
- **It runs nearly all the time.** An inverter running slow and steady is doing its job.

Call if any of these comes with an error code, frost that never clears, or ice that keeps building on the outdoor unit. The [winter guide](https://roomwisedcminisplits.com/guide/do-mini-splits-work-in-winter/) explains defrost in more detail.

## Common problems and what can cause them

One symptom points to a short list of causes, rarely to a single one. The diagnostic visit narrows the list with readings, not guesses.

| What you notice | What can cause it | What we check |
| --- | --- | --- |
| Blows air, doesn’t cool | Dirty filters or coil, low charge from a leak, failed sensor, outdoor fan or compressor not running | Filters, coil, pressures and temperatures, outdoor unit |
| Not heating | Iced outdoor coil, low charge, temperature below the unit’s rating, board fault | Defrost behavior, coil, pressures, error history |
| Water running from the head | Blocked drain, failed pump, head out of level, ice melting off the coil | Drain slope, pump, level, airflow |
| Blinking lights or a code | Sensor, communication wiring, board, protection trip | Manufacturer code table, wiring, board |
| Ice on the indoor lines or coil | Low airflow, low charge | Filters, blower wheel, pressures |
| Shuts off and restarts | Oversized unit short cycling, outdoor unit overheating, power or board fault | Sizing, clearances, voltage, error history |
| Musty smell | Growth on the blower wheel or coil, standing water in the pan | Blower wheel, coil, drain pan |

Water on the wall has its own guide: [mini split leaking water](https://roomwisedcminisplits.com/guide/mini-split-leaking-water/). A unit that short-cycles because it was oversized at install has no part to replace; the [sizing guide](https://roomwisedcminisplits.com/guide/mini-split-sizing/) explains why, and the answer may be a smaller head.

## Refrigerant leaks

A mini split is a sealed circuit. If the charge is low, refrigerant has leaked out somewhere. We don’t top off a system without finding and fixing the leak, because the new charge would leak out the same way.

### Where leaks start

- **Flare joints** at the head and at the outdoor unit, where a fitting wasn’t torqued right or has loosened with vibration
- **Line sets** that were kinked, crushed or rubbed through on a sharp edge of brick
- **Coils** with pinhole corrosion

### How we fix one

We find it with an electronic detector, bubble solution and a nitrogen pressure test, then repair the joint or the section. Before any refrigerant goes back in, the system gets a pressure test and a deep vacuum, then the charge is weighed in to the manufacturer’s figure.

Roomwise’s typical range for finding and fixing a refrigerant leak, then recharging the system, is $300 to $1,500 and up. A leak inside a finished wall or under a buried flare costs more to reach.

## What mini split repairs cost

Every repair starts with a diagnostic visit. Roomwise’s typical diagnostic visit for a mini split is $100 to $250, credited toward the repair if you approve it. You get a written repair price before any part is ordered.

| Repair | Roomwise’s typical range |
| --- | --- |
| Diagnostic visit | $100 to $250 |
| Clearing a blocked condensate drain | $100 to $300 |
| Replacing a condensate pump | $200 to $500 |
| Indoor or outdoor fan motor | $300 to $1,200 |
| Control board (inverter boards at the top) | $300 to $1,800 |
| Finding and fixing a leak, then recharging | $300 to $1,500 and up |
| Compressor replacement | $1,500 to $4,000 and up |

Roomwise’s typical range for a mini-split repair is $250 to $1,500. Compressor failures cost more and are priced separately.

### What moves a repair price

- How the outdoor unit is reached: a ground pad, a high wall bracket or the roof
- Whether parts for your model are on hand or have to be ordered
- Where a leak sits, and how much finished wall stands between us and it
- Whether one fault caused another, such as a blocked drain that wet a board

## Repair or replace?

A repair makes sense when one part failed on a system that otherwise did its job. When the compressor fails on an older unit, or the room was never comfortable, compare the repair price with a replacement before you spend.

Roomwise’s typical range for a like-for-like single-zone replacement is $4,000 to $7,500, when the line set passes its test and the circuit is sound. The [replacement page](https://roomwisedcminisplits.com/mini-split-replacement/) explains what can be reused. Our written repair price sits next to that number, so the choice is yours with both figures in front of you.

## Keeping it from happening again

Several of the faults above start as dirt: a drain slowly clogging, a filter that wasn’t washed, a coil that stopped breathing. A yearly [maintenance visit](https://roomwisedcminisplits.com/mini-split-maintenance/) catches those early.

If the trouble traces back to the original install, such as a drain without enough fall or a line set crushed behind a cabinet, the repair fixes that cause too. The [condensate drain guide](https://roomwisedcminisplits.com/guide/mini-split-condensate-drain/) shows what a good drain path looks like, and our [installation pages](https://roomwisedcminisplits.com/single-zone-mini-split-installation/) show how we plan one from the start.

## What's included

- A diagnostic visit to the indoor and outdoor units
- Reading error codes and checking boards, sensors and control wiring
- Checking filters, the coil, the blower wheel, the drain and any pump
- Pressure and temperature readings on the refrigerant circuit
- A written explanation of the cause and a repair price before parts are ordered
- Leak search and repair, then a pressure test and deep vacuum before recharging
- Replacement of failed parts such as pumps, fan motors, boards and sensors
- A test run in heating and cooling once the repair is done

## Repair or replace a mini split that has stopped working

|  | Points toward repair | Points toward replacement |
| --- | --- | --- |
| The failed part | Drain, pump, sensor, fan motor or board | Compressor on an older system |
| Refrigerant | One leak, found and fixed | Repeated leaks or a corroded coil |
| Comfort before the fault | The room was comfortable | The room never held its temperature |
| Parts | Available for your model | Discontinued or long waits |
| Repair price | A small share of a new system | A large share of a new system |

## Related resources

- [Learn**Why is my mini split leaking water?** A dripping head is almost always water that isn't reaching the drain. How to narrow down why, what's safe to check, and what a repair costs.](https://roomwisedcminisplits.com/guide/mini-split-leaking-water/)
- [Learn**Where does a mini split's condensate drain go?** Every indoor head makes water. How it gets out of the house, by gravity or by pump, and what keeps the line working for years.](https://roomwisedcminisplits.com/guide/mini-split-condensate-drain/)
- [Learn**What size mini split do I need?** Why two rooms of the same size can need very different units, what goes into a heat-load calculation in Washington, and how to spot a quote sized by guesswork.](https://roomwisedcminisplits.com/guide/mini-split-sizing/)
- [Learn**Do mini splits work in winter?** What happens inside a heat pump on a 25-degree DC morning, how to read a unit's cold-weather numbers, and how to plan for the handful of nights that test it.](https://roomwisedcminisplits.com/guide/do-mini-splits-work-in-winter/)

## How a job runs

### First call

You tell us which rooms, when they're uncomfortable, and what heats and cools the house now.

### Home visit

We measure the rooms, check your panel, and look at the walls for line routes and a spot for the outdoor unit.

### Written plan

Head locations, the line route, the drain plan and a price, in writing.

### Install and startup

Mount, route, pressure-test, vacuum, start each head and walk you through the controls.

## Repair: questions

### Why is my mini split blowing air but not cooling?

Start with the filters; clogged ones choke airflow and can freeze the coil. If clean filters don't help, the cause can be low refrigerant from a leak, a failed sensor, or an outdoor fan or compressor that isn't running. Readings on a diagnostic visit tell them apart.

### Why is water dripping from the outdoor unit in winter?

That is almost always melted frost. In heating mode the outdoor coil frosts over, and the unit runs a defrost cycle that melts it off. The water needs somewhere to drain, but it is not a fault. Ice that keeps building on the unit is.

### What does a blinking light on my mini split mean?

It is an error code. The pattern or number points to a section of the manufacturer's code table, such as a sensor, communication wiring or a protection trip. Write it down, along with the model number on the side of the head, before you call.

### Should I fix a mini split compressor or replace the system?

Compare the two prices first. A compressor replacement typically runs $1,500 to $4,000 and up. On an older system, or one that never kept the room comfortable, that money can go a long way toward a new system. We price the repair in writing so you can compare.

### What does a mini split diagnostic visit cost?

Roomwise's typical diagnostic visit for a mini split is $100 to $250. It covers both units, the error history and the readings needed to find the cause, and the fee is credited toward the repair if you go ahead. You get a written repair price before any part is ordered.

## Related services

- [Service**Maintenance** A yearly service visit, and a deep cleaning when the blower wheel needs one.](https://roomwisedcminisplits.com/mini-split-maintenance/)
- [Service**Replacement** A new system on the old system's spot, keeping only the parts that pass a test.](https://roomwisedcminisplits.com/mini-split-replacement/)
- [Service**Single-zone installation** One outdoor unit, one indoor head, one room that finally holds its temperature.](https://roomwisedcminisplits.com/single-zone-mini-split-installation/)

## Get an estimate for repair

Tell us which rooms aren't working and where the house is. We'll set up a home visit and put the plan in writing.

(771) 213-3105