The independent heating and cooling company across Washington

Furnace Replacement in Renton, WA

Furnace replacement in Renton starts with a look at the old unit, the flue, the gas line and the duct system, because a new furnace bolted to undersized returns will disappoint you. We measure the home, talk through single-stage versus modulating, and cover what venting the install needs. Cracked heat exchangers, repeat repairs and a furnace that cannot keep up on a wet cold morning are the usual reasons homeowners call. Reach us by phone, or fill in the quote form and describe your current system.

Call (888) 365-6280

You reach a person, not a menu
Open every day
The quote comes first, in writing

Taking calls until 5:00 PM PT

Every major brand, one numberCarrier Trane Lennox Goodman Rheem York American Standard Bryant

The symptoms that lead here in Renton

There is a bang or boom when the burners light Delayed ignition, burner or gas valve fault, combustion issue
The furnace runs and runs and the house still feels cold Undersized or worn equipment, duct losses, failing burners
It kicks on, runs two minutes, shuts off, over and over Short cycling from oversizing, limit switch trips, airflow restriction

What a furnace replacement actually involves

We start by measuring the house, not by matching the sticker on the old unit. Sizing gets checked against square footage, insulation, window area and duct capacity, because an oversized furnace short cycles and never gets comfortable. Then we shut down and disconnect the old equipment, set the new furnace, connect gas, flue, electrical and condensate, and tie it back into your existing ductwork. Most single-day jobs finish with the heat running before we leave. Older homes sometimes need duct or venting corrections, and we tell you that up front.

What we check and what goes in

Before we quote anything we inspect the heat exchanger, the flue and combustion air path, the electrical supply, the gas line size and the return air capacity. Undersized returns are common in houses that have been remodelled over the years. On install day we set the new furnace, replace the flue connector where needed, fit a fresh filter rack sized for real filtration rather than a thin throwaway, and commission the unit. Smoke season made filter cabinets a regular part of this conversation across the region.

How we decide replacement is the right call

Repair wins more often than people expect, so we say so when it does. Replacement makes sense when the heat exchanger is cracked, when parts for your model are no longer available, when the unit is past its service life and failing in more than one place, or when repair costs are stacking up on equipment that will not last another winter. We also look at whether a heat pump paired with your furnace fits your house better. You get the options and the reasoning, then you choose.

Renton coverage

From Renton we also cover Kent, Tukwila, Newcastle, Bellevue, Issaquah, Maple Valley, Auburn and Federal Way.

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Related furnace installation work in Renton

All furnace installation in Renton → · Furnace Replacement across the region →

What you get on every job

You approve a written quote first

Covering 162 cities across Oregon, Washington.

Phones answered by people

Open 7 days, 8:00 AM to 5:00 PM PT.

Every major brand, gas and electric

Carrier, Trane, Lennox, Goodman and more. We are not an authorized dealer for any of them.

Furnace Replacement in Renton — quick answers

How long does a furnace replacement take?

Most straightforward swaps finish in one day, with heat running before we leave. If venting, gas line or return air work is needed, it can stretch into a second day. We tell you which before we start.

Can I keep my existing ductwork?

Usually yes. We measure return and supply capacity first, because a new furnace on undersized ducts will run loud and short cycle. If ducts need modification, we show you what and why.

How soon can you get to a Renton home?

Call or send us a message and we will give you a real window rather than a vague promise. Renton sits close enough to our regular Washington routes that same-week visits are normal outside of the first hot stretch of summer and the first hard cold snap, when everyone calls at once. If your heat is out entirely or someone in the house is vulnerable to the temperature, say so when you reach us and we will move you up. If you smell gas, leave the building first, call 911 or your gas utility, then call us.

How it works

Step 1
Tell us the symptom
Call or fill in the quote form. Describe the noise, the smell, the temperature, and when it started. That detail helps us bring the right parts and gives you an honest idea of the visit ahead.
Step 2
We diagnose on site
A technician checks the thermostat, airflow, electrical connections, refrigerant behaviour and the outdoor unit. We tell you what failed and why, in plain language, before anyone reaches for a part or a price.
Step 3
You choose the repair
We lay out the fix, any parts on order, and what happens if you wait. Once you agree, we do the work and confirm the system holds temperature before we pack up and leave.

Call (888) 365-6280

A real person answers
Open 7 days
Written quote before work starts

Why homeowners call us

Heat pumps are our normalIn this region heat pumps outnumber furnaces, so defrost boards, reversing valves and short cycling in wet weather are everyday work for us. We know how these systems behave in a cold December rain, not just on a test bench.
Wet winter defrost problemsIce on the outdoor coil, a unit that runs and runs without warming the house, puddles that refreeze under the pad. We trace whether it is a sensor, a stuck valve, drainage, or airflow, then fix the actual cause.
Filtration after smoke seasonWildfire smoke turned indoor air quality into a real conversation here. We look at filter fit, return sizing and IAQ options that your blower can actually push air through, rather than choking the system with the wrong media.
We explain before we chargeYou get the diagnosis, the options and the trade-offs before work starts. If a repair is not worth it on an old system, we say so. No pressure, no jargon dumped on you at the door.
All major brands, gas & electricOne independent crew for Carrier, Trane, Lennox, Goodman, Rheem and more.
Straight answersNot worth fixing? We say that out loud, and often it saves you the visit fee.