Locally-owned since 1977 • Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD) • NATE-certified technicians • Carrier Factory Authorized Dealer
Mini-split repair from Home Comfort Alliance
Home Comfort Alliance repairs single-zone and multi-zone ductless mini-splits of all major brands across the Seattle-Tacoma area, and we are a Mitsubishi Electric Diamond Dealer. A repair visit has a $119 dispatch fee, and diagnostics are $72 for a standard diagnostic or $130 for a deeper one, listed separately. You get a written, upfront price before any work begins. We serve the area from Redmond, Everett, Bremerton and our Sumner headquarters, and our phones are answered and bookings are accepted 24/7.
Call (425) 645-0404 or book online. Ducted heat pump? See heat pump repair.
Turn it off first if you see this
A burning or electrical smell, sparks, or water dripping onto an outlet or wiring: switch the system off with the remote and at its breaker, then call us. A burning or electrical smell is a qualifying emergency after hours.
Signs your mini-split needs repair
- A blinking light on the indoor unit or an error code on the remote
- Water dripping from an indoor head
- A musty smell when it runs
- Not heating or cooling, or cool air in heat mode
- One head out on a multi-zone system
- No response to the remote
- Clicking, grinding or rattling noises
- The outdoor unit stays iced over for hours, or sits tilted
- The breaker trips, or the system is dead after a power outage
What does that symptom usually mean?
| Symptom | Common causes | What you can check | Call us when |
|---|---|---|---|
| Blinking light or error code | The system has recorded a fault | Note the code and look it up in the owner's manual | The code returns after a reset; most codes need a technician |
| Head leaking water | Clogged condensate drain, a failed condensate pump, a head or drain line that is not level, or a frozen coil | Turn it off and rinse the filters | Water comes back, or drips near wiring |
| Musty smell | Dust and growth on the coil and blower wheel inside the head | Rinse the filters | The smell stays after the filters are clean |
| Not heating or cooling | Dirty filters, a blocked outdoor unit, a refrigerant leak, or a sensor, board or fan motor | Mode and set point, filters, outdoor unit clear | It still won't heat or cool after those checks |
| One head down on a multi-zone | That head's sensor, fan, board, drain or wiring | Batteries and mode on that head's remote | The other heads work but that one doesn't |
| All heads down | The outdoor unit or its power supply | Reset the breaker once | It trips again or nothing lights up |
| Dead after a power outage | A surge can damage a control board | Reset the breaker once, then wait a few minutes | No lights on the unit or remote |
| Ice that stays for hours | Defrost, airflow or refrigerant problems | Clear snow and debris; never chip the ice | Solid ice stays after the defrost cycle |
What can you safely check first?
- Check the mode and set point on the remote.
- Put two new batteries in the remote and use its reset button.
- Turn the system off, then rinse and dry the washable filters behind the front panel of each head. The Department of Energy's Building America program suggests about every 3 months, more often with pets or smoke.
- Reset the system's breaker once only.
- Clear leaves, debris and snow from around the outdoor unit and rinse it gently. Never use a pressure washer.
If a head is mounted too high to reach safely, book a maintenance visit instead of using a ladder you are not comfortable on.
Blinking lights and error codes
A blinking light on the indoor unit, or a code on the remote's display, means the system has detected a fault and recorded it. Codes are brand and model specific, so the same pattern can mean different things on a Mitsubishi, a Carrier or a Daikin. Note the brand, the model and the code, and send them to us when you book so the technician can prepare. We don't diagnose by phone: a code points to a fault area, and the technician confirms it with tests.
Why is my mini-split head leaking water?
The indoor head pulls moisture out of the air, and the water drains away through a condensate line, sometimes with a small pump. Leaks usually come from a clogged drain line, a failed condensate pump, a head or drain line that is not level, or a coil that froze because of a dirty filter or low refrigerant (Carrier). If water drips near wiring, turn the system off. Not sure whether it is water or refrigerant? Read refrigerant leak or condensation.
Musty smells and dirty heads: when cleaning is the repair
Rinsing the filters cleans what you can see. The coil and the blower wheel inside the head collect dust and moisture that a filter rinse can't reach, which causes musty smells, weak airflow and dripping. When that happens, the head needs a deep cleaning, which the technician quotes on site. Routine yearly care is our mini-split and heat pump tune-up: $230, or $180 for Home Comfort Club members, per piece of equipment (heat pump and ductless maintenance).
Multi-zone systems: one head down vs all heads down
On a multi-zone system, several indoor heads share one outdoor unit. If one head stops while the others work, the fault is most often in that head or its wiring, and a single head fault does not mean replacing the system. If every head stops at once, the problem is more likely in the outdoor unit or its power supply.
Repair or replace your mini-split?
How long do mini-splits last?
Carrier says a well-maintained, high-quality mini-split generally lasts 10 to 15 years.
The $5,000 rule
Multiply the unit's age by the repair price. If the result is over $5,000, get a replacement price before you repair. It is a rule of thumb, not a verdict.
Repair usually wins on a younger system with one failed part. Replacement makes more sense with repeated refrigerant leaks, a compressor failure on an older unit, or parts that are no longer made. Replacement estimates are free, and our instant quote tool shows a price range in about 30 seconds. New installations come with a 3-year Comfort Shield labor warranty on new installations, kept active with yearly maintenance. First-year maintenance is included.
Replacing an existing ductless heat pump usually does not qualify for utility heat pump upgrade rebates, while converting from electric baseboard or a furnace can. We check which rebates apply to your home (rebates, heat pump replacement).
What does mini-split repair cost?
| Home Comfort Alliance service prices (as of September 2026) | Price |
|---|---|
| Dispatch fee | $119 |
| Standard diagnostic | $72 |
| Deeper diagnostic | $130 |
| After-hours dispatch fee, qualifying HVAC emergencies | $330 (replaces the $119) |
| Mini-split or heat pump tune-up, per piece of equipment | $230 ($180 Club) |
| Repairs | Written upfront price before work |
Fees are listed separately. Ask about our $50 off HVAC service or repair offer (cannot be combined with Club pricing). For repair costs by part, see our heat pump and mini-split repair cost guide.
Financing through Salal Credit Union or Synchrony starts at $179/month* (financing).
*Financing through Salal Credit Union or Synchrony, subject to credit approval. Rates, terms and monthly payments depend on the amount financed, the plan and your credit. 0% interest options are available to qualifying customers. See lender for full terms.
Get an estimateA comfort advisor will call you to set up your visit.
Warranty: what the manufacturer covers
Manufacturer warranties cover listed parts for a set time and usually not the labor. Terms depend on the brand, on registration and sometimes on who installed the system: Mitsubishi Electric, for example, says residential systems registered within 90 days of installation are eligible for its best warranty terms (Mitsubishi Electric registration). If your system is young, call the company that installed it first. Either way, have the model and serial number ready when you book.
After hours: when a mini-split can't wait
Heating and cooling technicians work during business hours and are available after hours for qualifying emergencies ($330 after-hours dispatch fee instead of the $119). Qualifying emergencies include no heat in cold weather when the ductless system is your home's heat, no cooling in a heat wave, and a burning or electrical smell. The $330 after-hours dispatch fee applies any day of the week, including weekends and holidays, with no extra holiday surcharge; the only exception is the holidays we are closed (after-hours heat pump repair).
How a mini-split repair visit works
- Book, and tell us the brand, model, any code and how many heads you have.
- A NATE-certified technician tests the heads, the outdoor unit, the drain and the refrigerant circuit.
- You get a written, upfront price before any work begins.
- The repair. Our trucks are fully stocked, so most repairs can be handled on the spot.
- We test every head in heat and cool before we leave.
What you get with Home Comfort Alliance
- Repairs on all major ductless brands, whoever installed them
- Mitsubishi Electric Diamond Dealer, Carrier Factory Authorized Dealer, Lennox Premier Dealer and Quilt dealer
- Upfront, transparent pricing before any work begins
- NATE-certified technicians; licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD, WA Electrical Contractor Lic. #HOMECCA782DC)
- Home Comfort Club from $15 a month, with member pricing on repairs
Where we repair mini-splits
We repair ductless systems across the Seattle-Tacoma area from four branches: Redmond (Seattle, Bellevue, Redmond, Kirkland, Bothell, Woodinville, Sammamish, Mercer Island), Everett (Everett, Mill Creek, Lake Stevens, Snohomish, Edmonds, Mount Vernon), Bremerton (Bremerton, Kingston, Poulsbo, Bainbridge Island) and Sumner (Sumner, Puyallup, Tacoma, Kent, Auburn and nearby). City pages: Seattle, Bothell, Sammamish, Kent, Auburn, Lynnwood, Tacoma.
A recent mini-split repair in Ballard
In October 2026 a Ballard homeowner called because none of the four heads on their mini-split system would turn on from the remotes. The technician traced the problem to a blown fuse in the outdoor disconnect, replaced the fuse and tested the system, and all four heads came back on.
It is a good example of why we check power at the outdoor unit before blaming the heads or the remotes: when every head goes dark at once, the cause is often shared by all of them.
Mini-split repair FAQ
How much does mini-split repair cost?
A repair visit from Home Comfort Alliance starts with a $119 dispatch fee, and diagnostics are $72 for a standard diagnostic or $130 for a deeper one, listed separately. After the diagnosis the technician gives you a written price for the repair before any work begins, and you can use our $50 off HVAC service or repair offer. For a benchmark, see our heat pump and mini-split repair cost guide.
Are mini-splits worth repairing?
Usually, yes, when the system is under about 10 years old and the problem is one part, such as a drain, sensor, fan motor, board or remote. Replacement starts to make more sense when the unit is past 10 to 15 years, needs a compressor, or keeps losing refrigerant. We price both when you ask, so you can compare.
What is the average lifespan of a mini-split?
Carrier says a well-maintained, high-quality mini-split generally lasts 10 to 15 years. Yearly maintenance, clean filters and a correct installation help it reach the top of that range.
What is the $5,000 rule for HVAC?
Multiply the unit's age by the repair price. If the result is over $5,000, it is worth getting a replacement price before you repair. It is a rule of thumb, not a verdict: a young system with one costly part can still be worth fixing.
Why is my mini-split blinking?
A blinking light on the indoor unit or a code on the remote means the system has detected a fault. Codes differ by brand and model, so check your owner's manual, note the code and send it to us when you book. Most codes need a technician to confirm the cause with tests.
Why is my mini-split leaking water inside?
The most common causes are a clogged condensate drain line, a failed condensate pump, a head or drain line that is not level, or a coil that froze because of a dirty filter or low refrigerant. Turn the system off, clean the filter and call us if the water comes back.
Why does my mini-split smell musty?
Dust and moisture build up on the coil and blower wheel inside the head, where rinsing the filter can't reach. If the smell stays after you clean the filters, the head needs a deep cleaning, which the technician quotes on site.
One head on my multi-zone system stopped working. Is the whole system failing?
Not usually. If only one head is out, the fault is most often in that head, such as a sensor, fan motor, board or its wiring to the outdoor unit. If every head stops at once, the problem is more likely in the outdoor unit or its power supply.
My mini-split stopped working after a power outage. What should I do?
Reset its breaker once and give it a few minutes. If the remote and the unit still show no lights, leave it off and book a repair, because a surge can damage a control board.
Do you repair mini-splits you didn't install?
Yes. We repair all major ductless brands, whoever installed them, and we are a Mitsubishi Electric Diamond Dealer. If your system is still under a manufacturer warranty, have the model and serial number ready when you book.
Does the manufacturer warranty cover my repair?
Manufacturer warranties cover listed parts for a set time and usually not the labor. Terms depend on the brand and on registration: Mitsubishi Electric, for example, says residential systems registered within 90 days of installation are eligible for its best warranty terms.
Can someone come after hours if my mini-split stops heating?
Yes, for qualifying HVAC emergencies, such as no heat in cold weather when the ductless system is your home's heat. After hours, qualifying emergencies have a $330 after-hours dispatch fee instead of the $119.
How much is mini-split maintenance?
Our mini-split and heat pump tune-up is $230, or $180 for Home Comfort Club members, per piece of equipment. Deep cleaning of a dirty head is quoted on site by the technician.
Sources: Mitsubishi Electric warranty registration (read October 29, 2026); DOE Building America, cleaning ductless filters; Carrier ductless systems; Home Comfort Alliance service prices (September 2026).
Why Choose Home Comfort Alliance for Mini-Split Repair?
Your Comfort is Our Promise
Reliable heating, air conditioning, plumbing and electrical service, all from one trusted company.
To educate and guide you through your options so you’ll find the right solution at the right price.
Knowledgeable and respectful workers who ensure both your own comfort during the installation process, and lasting comfort from your home systems.
Outstanding service, communication, and follow-up, so your home is comfortable now and for years to come.
Get your mini-split fixed
Tell us what you need, and our team will set up a repair visit with a written, upfront price.
Get an estimate
We will call you to set up the visit.