Heating services
Furnace Repair in Renton, WA
Most no-heat calls come down to one part, not a whole furnace. We test the igniter, board, and gas valve before we quote, then tell you what failed and what it costs.
- Licensed & insured
- Fair rates
- Serving all of Washington
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Before & after
Heating & Cooling, before and after
A representative example of the kind of heating & cooling work we do. Illustrative only, not a photo of a specific customer's job.
Get a free quoteJoshua replaced my AC mini-split and did an excellent job. He was professional, knowledgeable, and took the time to explain everything clearly. The installation was done quickly and with great attention to detail, and the system has been running perfectly ever since. I really appreciate the honest service and would highly recommend Joshua and his team to anyone needing HVAC work.
Overview
Furnace Repair done right
Westside Comfort Solutions is a licensed HVAC contractor serving Renton, WA that repairs gas and electric furnaces and finds the real cause of a no-heat call.
Most no-heat calls come down to one part, not a whole furnace. We test the igniter, board, and gas valve before we quote, then tell you what failed and what it costs.
- No-heat and short-cycling diagnostics
- Igniter, flame sensor, and board faults
- Gas valve and burner repair
- Blower motor and capacitor repair
- Safety and carbon-monoxide checks
Why it matters
Why furnace repair is worth doing right
Most no-heat calls come down to one part: a cracked or worn igniter, a dirty flame sensor, a failed control board, a stuck gas valve, or a tripped safety. We test the furnace in sequence instead of swapping parts and hoping, so you pay to fix what actually failed.
Some furnace symptoms are safety issues, not comfort ones. A gas smell, a yellow or flickering pilot instead of a steady blue flame, or a banging boom on ignition all warrant shutting the system down and calling. A cracked heat exchanger can leak carbon monoxide, so we check combustion and venting as part of every furnace repair.
Warning signs
Signs your furnace needs repair
Call for service when your furnace shows any of these:
- No heat, or air that never gets warm
- Short cycling, turning on and off without finishing a heat cycle
- Banging or booming on startup (delayed ignition, which can crack the heat exchanger)
- Squealing, grinding, or rattling from the blower
- A yellow or flickering pilot flame instead of steady blue
- A burning or electrical smell from the vents
- A gas smell near the furnace (leave, then call the gas company first)
- A sudden spike in your heating bill with no change in use
How it works
What to expect with furnace repair
- 01
Diagnostic visit
We test the igniter, flame sensor, gas valve, board, and safeties in sequence to find the actual fault, and check combustion and venting for safety.
- 02
Find the root cause
We identify what failed and why, so a quick fix doesn't turn into a repeat no-heat call.
- 03
Quote before work
You get a clear price before we start, plus an honest read on whether repair or replacement is the better value on an older furnace.
- 04
Repair and test
We repair with code-correct parts and run a full heat cycle, confirming safe ignition, airflow, and shutoff.
Fair, upfront pricing
What affects the cost
We quote the repair once we've diagnosed it. What affects the price:
- The failed part (a flame sensor is minor; a heat exchanger or gas valve is major)
- Gas versus electric furnace
- Parts availability for older or discontinued models
- How accessible the furnace is
- Whether a safety issue makes replacement the better call
Every job is different, so you get a clear quote before any work starts, with no surprises. Financing is available, so the right fix doesn't have to wait. We're licensed (WESTSCS752MT) and insured, and we back our work with a 1-year workmanship guarantee.
We treat every furnace repair job like it's in our own home: diagnose it right, quote it fair, and stand behind the work.
Related services
More heating services
See all heating services.
Questions
Common questions about furnace repair
My furnace won't turn on. What's wrong?
It's often a failed igniter, flame sensor, control board, or a tripped safety. We test the actual furnace to find the real cause instead of replacing parts and hoping.
Is it worth repairing an older furnace?
Frequently, yes. We'll tell you honestly whether a repair makes sense or whether replacement is the better value, and we won't push a new unit you don't need.
Do you handle no-heat emergencies?
Yes. We prioritize no-heat calls and answer 24/7 for emergencies, because heat can't wait in a cold snap.
Is it safe to keep running a furnace that bangs or smells?
No. A boom on startup can crack the heat exchanger, and a burning or gas smell points to a real hazard. Shut the furnace off and call us; if you smell gas, leave first and call the gas company, then us.
What's the most common furnace repair?
On modern furnaces, a dirty flame sensor or a worn igniter causes most no-heat and ignition-failure calls. Both are usually a straightforward fix, which is why we test before we quote.
Local experts, reliable service
Proudly serving Renton, WA and nearby communities
Based in Renton, we serve homes and businesses across Washington with honest diagnostics and quality work that lasts.
- Licensed, bonded & insured
- Upfront, fair pricing with no surprises
- 24/7 emergency service
- Clean, respectful crews
- Local and owner-operated
Service areas
- Greater Seattle / Eastside
- South Sound
- North Sound
- Statewide
Need furnace repair? Let's talk.
Tell us what's going on. We'll diagnose it right and only recommend what you actually need.