Quick answerDuctless mini-split repair in Spokane begins with the unit's error code, which narrows the fault to a sensor, a board, a fan motor, the refrigerant circuit or communication between the indoor and outdoor units. Most repairs are sensors, drain lines, fan motors and line-set leaks, and many are fixed in one visit.
Updated September 2026
How ductless systems fail
Mini-splits are reliable, but they are inverter systems packed with sensors and electronics, so the failures look different from a furnace. The head might blink a code, run for a minute and stop, or blow air that never gets warm. In winter, the outdoor unit may ice over or refuse to come out of defrost.
We diagnose with the manufacturer's code table, test thermistors and voltages, check refrigerant pressures and confirm the drain is clear. Then you get a price for the repair before we start, and an honest opinion if the system is old enough that replacement makes more sense.
Three common mini-split problems
Head unit not blowing warm or cold
When the indoor head runs but the air feels like room temperature, the cause is usually a failed thermistor, a stuck expansion valve, low refrigerant or an outdoor unit that is not running at all. We check whether the compressor and outdoor fan start, read the sensor values and compare pressures to the manufacturer's charts. In heating mode during a cold snap, we also confirm the unit is rated for the outdoor temperature, because some older standard models simply cannot keep up below the low teens.
Line-set leaks
A slow refrigerant leak shows up as weakening performance over weeks, ice on the outdoor valves or an error for low pressure. The most common leak points are the flare connections at the head and the outdoor unit, especially on installs that were not torqued to spec. We find the leak with electronic detection and bubble testing, repair or remake the flare, pressure test with nitrogen, pull a vacuum and weigh in the correct charge. Adding refrigerant without finding the leak only buys a few months.
Error code diagnosis
Every brand uses its own code set, and the same blinking pattern can mean different things on Mitsubishi Electric, Fujitsu or Daikin units. We read the code from the head or the outdoor board, then test the part it points to rather than replacing it on faith. Communication errors between the indoor and outdoor units are common after power surges and are often wiring or board faults, not a dead system. We check the interconnect cable and terminal screws first, because a loose wire is a far cheaper fix than a new board.
Signs your mini-split needs service
How we repair a ductless system
- 1
Read the code
Blink pattern or display code logged from each unit.
- 2
Check power and communication
Voltages and signal between indoor and outdoor units.
- 3
Test the pointed part
Sensor, motor or board tested before replacement.
- 4
Check refrigerant
Pressures and temperatures compared to the chart.
- 5
Quote and repair
Price approved, part replaced or leak repaired.
- 6
Clean the head
Filters, coil and drain cleared while it is open.
- 7
Run every mode
Heating, cooling and defrost verified before we leave.
Why ductless heat matters in Spokane
Many Spokane homes switched from electric baseboard to ductless heat pumps, helped by an Avista rebate that has paid for baseboard-to-ductless conversions using high-efficiency units. Those systems now carry the whole heating load in their rooms. With winter temperatures that are rarely below 11 degrees but sometimes are, a head that stops working on a cold night is a real problem, which is why we treat ductless no-heat calls as urgent.
What you can check before calling
| Safe to do yourself | Call us | |
|---|---|---|
| Dirty filters | Pull and rinse the head filters | If airflow stays weak after cleaning |
| Blinking code | Note the pattern and reset power once | If the code returns |
| Ice on the outdoor unit | Clear snow away from the base | If it stays iced for hours |
| Water dripping | Check the drain line outside for a blockage | If the head keeps leaking |
| Refrigerant | Never add it yourself | Always |
What drives the cost of a mini-split repair
Mini-split repair questions
Why is my mini-split blinking?
It has logged a fault code. The pattern points to a sensor, drain, fan or refrigerant problem, and the meaning differs by brand. Note the pattern before you call.
Can you repair any brand?
We work on the common brands, including Mitsubishi Electric, Fujitsu, Daikin, Carrier and LG, and diagnose others by code table.
Is it worth repairing an older mini-split?
If it is under about 12 years old and the fault is a sensor, drain or leak, usually yes. A failed compressor on an older system tips it toward replacement.
Why does my head drip water?
Most often a clogged drain or a dirty coil that freezes and thaws. Cleaning the head and clearing the line fixes it.
Do mini-splits need maintenance?
Yes. Filters every month or two and a professional cleaning once a year keep the coil and blower from growing mold.
Other heat pumps & ductless services we handle
Heat Pump Installation
Sized, quoted and permitted.
Heat Pump Installation detailsDuctless Mini-Split Installation
Sized, quoted and permitted.
Ductless Mini-Split Installation in SpokaneHeat Pump Repair
Answered 24/7, parts on the truck.
How we handle heat pump repairDuctless head down? we can get it running.
Call for ductless mini-split repair in Spokane, WA at any hour.
