North Eastside heating & cooling
HVAC Contractor in Cottage Lake, WA
Cottage Lake HVAC is a residential HVAC contractor in Cottage Lake, WA, providing furnace repair, heat pump repair, furnace installation, heat pump installation, ductless mini-split installation, air conditioning repair, air conditioning installation, HVAC maintenance and tune-ups, and ductwork and indoor air quality service. We serve Cottage Lake and the nearby communities of Woodinville, Redmond, Duvall, Bothell, Kirkland and Maltby.
- Furnaces, heat pumps, ductless and central air
- Gas, propane and all-electric homes
- Quote before any work begins
- [TENANT FACT: years serving the Eastside]
Heating and Cooling Services
Residential only. If it heats, cools or moves air in a Cottage Lake home, we repair it, replace it or keep it running.
Furnace Repair
No heat, short cycling, strange noises, or a furnace that won't ignite. Gas, propane and electric.
Heat Pump Repair
Heat pumps blowing cold, icing over, or running nonstop through a cold snap.
Furnace Installation
High-efficiency gas and propane furnaces sized for your house, permit included.
Heat Pump Installation
Cold-climate heat pumps that heat all winter and cool in summer.
Ductless Mini-Splits
Heating and cooling for homes without ducts, additions, shops and bonus rooms.
Air Conditioning Repair
Central AC that won't cool, freezes up, or trips the breaker on hot days.
Air Conditioning Installation
Adding central air to an existing furnace, or replacing an old AC unit.
HVAC Maintenance
Fall furnace and heat pump tune-ups and spring AC checks.
Ductwork & Air Quality
Duct repair and sealing, better filtration for wildfire smoke, and ventilation.
Heating and Cooling for Homes Around Cottage Lake
Cottage Lake homes aren't one-size-fits-all. Big wooded lots, long driveways and a mix of gas, propane, oil and all-electric houses mean the right fix for a cold house on Avondale Road can be different from the right fix in a Woodinville subdivision. Every visit starts with finding out what you actually have.
October is when the calls start. The first cold, wet nights show which furnaces skipped their tune-up and which heat pumps are low on refrigerant or iced over. Getting a system checked before the first real freeze is cheaper and calmer than an emergency call in January.
The June 2021 heat dome, when Seattle reached 108°F, changed how Eastside families think about cooling. Many homes built without air conditioning now add a heat pump or ductless mini-split, which heats all winter and cools on the few brutal summer days.
Storms matter too. Wind storms like the November 2024 bomb cyclone knocked out power across the Eastside for days. When the power comes back, it's common to find a furnace or heat pump that won't restart, and that's a call we can help with.
Puget Sound Energy serves this area, and PSE offers rebates on some heating upgrades, including switching from electric baseboard or furnace heat to a heat pump. Ask about current PSE rebates when you get an estimate.
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How a Service Call Works
Call or request
Tell us what the system is doing and when it started.
Diagnosis
A technician tests the system and finds the cause.
Clear quote
You get the price before any work starts.
Fix and follow-up
The repair or install gets done and the system is tested.
Questions Cottage Lake Homeowners Ask
Do I need a permit to replace my furnace or heat pump?
Usually, yes. In unincorporated King County, installing, replacing or relocating a furnace or air conditioner needs a residential mechanical permit, applied for through MyBuildingPermit.com. Homes inside Woodinville, Redmond or Bothell city limits go through that city instead. A heat pump or new circuit may also need an electrical permit. Your contractor should handle the permits.
Is a heat pump enough for winters in Cottage Lake?
For most homes, yes. Modern cold-climate heat pumps keep heating well below freezing, and many homes keep a furnace or electric backup for the coldest nights. A load check decides what size you need.
My furnace works but the house won't stay warm. Why?
Common causes are a clogged filter, leaky or disconnected ducts in the crawl space or attic, a failing blower or an undersized system. A technician can find which one.
Are you available after hours?
[TENANT FACT: after-hours and emergency availability]
What does HVAC repair cost in Cottage Lake?
It depends on the system, the part and access, so every job is quoted after a technician sees it. Request a free estimate using the form on this page for a free estimate.
Where We Work
Cottage Lake and the surrounding north Eastside communities:
- Cottage Lake
- Woodinville
- Redmond
- Duvall
- Bothell
- Kirkland
- Maltby
Cold house, noisy furnace, or thinking about a heat pump?
Talk to a local HVAC technician today.
Request a Free Estimate