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LarchHVAC & Appliance (425) 570-9520
Sam with a newly installed mini-split outdoor unitFormerly Adam & Sam Brothers Repair

Mukilteo · Ductless heat pump service

Ductless mini-splits from Harbour Pointe to Old Town Mukilteo

Mukilteo is really two places for us: Harbour Pointe, a planned community of 1980s and 1990s homes 16–20 minutes out, and Old Town on the bluffs above the ferry, 24–30 minutes out. Both make good mini-split homes, for different reasons.

Built 1980–99
About 49% of Mukilteo homes, mostly in Harbour Pointe.
Heating mix
About 53% gas, 44% electric across the city.
Electric utility
Snohomish County PUD; we look up current heat pump programs.
  • $85 diagnosticBecomes part of the repair price when you say yes. If you pass on the repair, that visit is all you pay.
  • Up to $18 offAny repair requested through the online form. The diagnostic itself is never reduced.
  • No-charge site visitInstalls are quoted in writing, equipment and installation work in one number.

Harbour Pointe began as a planned community in 1978, was annexed in 1991 and doubled the size of the city, and was largely built out by 2000. Its two-story homes, townhomes and condos make up the bulk of Mukilteo's housing, and many have a gas furnace with ducts that keep the main floor comfortable while the upstairs bedrooms swing warm in summer. Down the hill, Old Town and the streets along Mukilteo Blvd hold older homes on steep lots with views over Possession Sound toward Whidbey Island, where big windows and limited flat ground shape every heating decision. Kamiak High School and the Harbour Pointe golf course sit in the middle of the newer half, and Harbour Pointe Blvd carries most of our trips in.

A ductless heat pump fits both. In Harbour Pointe it usually means one or two heads for the upstairs or a bonus room, with the furnace left alone. In Old Town it can mean a whole-house system for a hillside home that never had ducts, or a single head for a view room that overheats in the afternoon. Paine Field, just east of town, set its 100°F record in 2009, tied it in 2020, and was reported to hit 100°F for a while during the 2021 heat dome, so cooling is no longer a luxury here. Our technicians do every refrigerant step themselves, following EPA Section 608 rules. Installs, repairs and deep cleanings are all part of our Mukilteo and Picnic Point work.

Signs your Mukilteo mini-split needs a visit

  • Head goes dark after a flicker in the power

    Likely cause
    Surge damage to the indoor board or a blown board fuse
    What we do
    Follow the supply through fuses and boards, swap the damaged one
  • U2 on some Mitsubishi outdoor units

    Likely cause
    High discharge temperature, often from low refrigerant
    What we do
    Check pressures and temperatures, then hunt for the leak
  • Bedroom head cycles on and off all night

    Likely cause
    Oversized head or a room sensor reading wrong
    What we do
    Test the sensor and review the sizing and settings
  • Salt crust on an Old Town outdoor coil

    Likely cause
    Spray off the Sound collecting in the fins
    What we do
    Rinse, inspect for corrosion, and check the joints
  • Condo head drips during humid weeks

    Likely cause
    Drain line sagging or blocked inside a chase
    What we do
    Clear the drain and fix the slope where we can reach it
  • Remote works but the head ignores it

    Likely cause
    Failed receiver board or a dead remote
    What we do
    Test the remote and the receiver, replace what failed

Bluffs, planned streets and a busy flight path

In Old Town and along the bluffs, the outdoor unit is often the hardest piece to place. Flat ground is scarce, decks hang over slopes and the view side of the house is the one nobody wants to clutter. Steep driveways and stairs down to the front door also shape install day, so we plan how the outdoor unit gets carried in. We often use a wall bracket on a side wall, with a line that drops straight from the head through the wall. Spray from the water reaches homes near the lighthouse and Chennault Beach, so we pick sheltered spots, rinse coils on service visits and check flare connections closely.

Harbour Pointe is more predictable, but it has its own rules. Many neighborhoods there have associations with design standards for exterior equipment, and townhome and condo buildings usually need board approval. You get a drawing for the board that shows where the outdoor unit sits, what the cover looks like and how the circuit reaches it. For an upstairs bedroom, we usually hang the head on an outside wall and bring the line down the siding in a painted cover. Because many neighbors have similar floor plans, a layout that worked next door is a useful starting point, though we still measure your rooms.

Noise and sleep matter here too. Homes near Paine Field and the SR 525 corridor already hear aircraft and traffic, and anyone who sleeps days after a shift wants a bedroom that stays cool and quiet in the afternoon. A properly sized inverter head runs at low speed for long periods, which is quieter than a window unit. Old Town also gets steady ferry traffic since the new terminal opened at the end of 2020, so we time visits there around the boat lines when we can. Picnic Point, with its 1960s and 1970s ramblers, often has baseboard heat, and there a mini-split can carry most of the house. Snohomish County PUD supplies power throughout, and part of every quote is a look at which PUD heat pump programs your home might qualify for.

Charging a heat pump outdoor unit with refrigerant

Mini-split costs in Mukilteo

Mukilteo mini-split repair and cleaning start at $285. When a control board is the fault, we also check what caused the failure so the new one survives. A new single-zone system starts at $4,000, including the equipment and the installation, and zones beyond the first start at $2,250 each. Whole-house systems for Old Town homes without ducts are multi-zone jobs and are quoted on request. Site visits and written quotes cost nothing. Every number here is where pricing begins in our area, not a quote. A repair goes on your estimate when the diagnosis is complete; an install is priced in writing after measurement.

See all prices

  • Mini-split deep cleaning (per indoor head)from $285
  • Mini-split fan motorfrom $375
  • Mini-split control boardfrom $475
  • Mini-split leak repair and rechargefrom $550
  • Diagnostic visit$85, included in the repair

Starting prices for the north Seattle area, 2026. The $85 diagnostic is included in any repair you approve, and the exact price is in the written estimate before work starts.

System, installed

  • Ductless mini-split, single zonefrom $4,000
  • Each added mini-split zonefrom $2,250
  • Multi-zone mini-split systemsOn request

Install prices start here, equipment and installation included, before any utility program. Multi-zone systems are priced after a visit. We do not charge for the site visit or the written quote.

Repair, replace or rethink the layout

Many Harbour Pointe mini-splits are add-ons to a gas furnace and are still fairly young. For those, a board, a fan motor or a drain repair is usually the sensible answer. Near the water the outdoor coil decides more: if salt has pitted the coil and it leaks, a repair may last only a season, and a new outdoor unit, or a new system, is the better investment. A compressor failure on a system past about twelve years points the same way. In Old Town homes where an early mini-split was meant to heat only one room and baseboards still do the rest, replacement is a chance to design a multi-zone layout for the whole house. Both paths, with prices and the life you can expect from each, go on one written estimate.

Common questions

How long does it take you to reach Mukilteo?

Harbour Pointe is about 16–20 minutes from our shop off-peak, and Old Town near the ferry is about 24–30. There is no distance surcharge for either. Same-day visits are available Monday through Saturday when you reach us in the morning, and having the code and the model number ready when you call saves time.

Will a mini-split help someone who sleeps during the day?

It can make a big difference. A head sized correctly for the bedroom keeps it cool through the afternoon heat while running at a low, steady speed, which is quieter than a window unit or a fan. Blackout curtains help too. We size for the room's afternoon sun, not just the floor area.

Can a mini-split go on an Old Town home with no level ground?

Yes. We often hang the outdoor unit on a bracket bolted into the framing, or set it on a stand over a small pad. Brackets keep the unit out of the snow and leaves, though they need safe access for service. We show you the proposed location and line route on the walk-through.

What does U2 mean on my Mitsubishi?

On some Mitsubishi systems, U2 points to an abnormally high compressor discharge temperature, often caused by low refrigerant or a restriction. Running the system that way can damage the compressor. Turn it off, note the code and the model number from the sticker, and give us both when you call or book. We will check pressures and temperatures and look for a leak.

Do Harbour Pointe HOAs allow mini-splits?

Most do, with conditions. Associations usually care about where the outdoor unit sits, how visible it is from the street, and the color of the line-set cover. We give you a written plan with those details for the architectural review. Read your covenants before scheduling; the install date can simply wait until the committee signs off.

Talk to Adam & Sam

Give us a call at (425) 570-9520, or book online and save up to $18 on the repair. The $85 diagnostic is rolled into the repair once you approve it, and we do the site visit for a new mini-split at no cost.

From Sam’s repair notes

Schedule a repair

Request a visit from Adam & Sam

Send the basics and we call you back with an arrival window, most days the same morning.

  • $85 diagnostic Becomes part of the repair price when you say yes. If you pass on the repair, that visit is all you pay.
  • Up to $18 off Any repair requested through the online form. The diagnostic itself is never reduced.
  • $10 off A second appliance’s diagnostic when we check it during the same trip.

Requests sent from this form get up to $18 off the repair. The $85 diagnostic stays the same and is folded into any repair you approve.

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