Heating and Furnace Service in Mount Vernon, WA
Furnace repair, replacement and tune-ups for Mount Vernon homes from our Everett branch: after-hours emergency heating service, Cascade rebate paperwork handled, and an upfront price before any work begins.
Locally-owned since 1977 • Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD) • NATE-certified technicians • Carrier Factory Authorized Dealer • Mitsubishi Electric Diamond Dealer
Heating service in Mount Vernon, at a glance
Home Comfort Alliance repairs, maintains and replaces gas, electric and oil furnaces in Mount Vernon from our Everett branch at 3409 Everett Avenue. Our heating technicians take after-hours no-heat calls, and same-day visits are available when possible. Repairs start with a $119 dispatch fee and a $72 standard diagnostic; replacement estimates are free. We are on Cascade Natural Gas's contractor list and handle the rebate paperwork for you.
Call (425) 645-0404 or use the form at the end of this page. Thinking about switching to a heat pump? See heat pumps in Mount Vernon.
Smell gas? Mount Vernon's natural gas comes from Cascade Natural Gas. Leave the house without touching switches, then call 911 or Cascade's emergency line at 888-522-1130 from outside. Call us once Cascade says the home is safe.
Furnace repair in Mount Vernon
Book a repair visit if the furnace will not start, blows cool air, shuts off early, short cycles, makes new noises or shows an error code. Before you call, check that the thermostat is on HEAT and set above room temperature, the breaker and furnace switch are on, and the filter is clean.
Most furnace repairs in our region cost $139 to $544, averaging $341, according to Angi's Seattle-area data (a regional estimate from August 2026, not our price). Our own prices:
Our Mount Vernon furnace repair prices
| Home Comfort Alliance item | Price |
|---|---|
| Dispatch (trip) fee | $119 |
| Standard diagnostic | $72 |
| Deeper diagnostic (when needed) | $130 |
| After-hours fee | $330 |
| Ignitor replacement | $353 to $821 |
| Thermostat replacement | $299 to $1,840 |
| Furnace tune-up | $230 ($180 for Home Comfort Club members) |
Prices as of September 2026. Each fee is listed on its own line; the two diagnostic fees are alternatives, not added together.
Current offer: $50 off HVAC service or repair (special offers). For a deeper look at repairs, see our main furnace repair page.
No heat tonight in Mount Vernon?
Call (425) 645-0404. Our heating technicians answer after-hours no-heat calls in Mount Vernon, with a $330 after-hours fee shown separately. Weekday visits, Monday to Friday 8 AM to 5 PM, are at regular rates. Keep space heaters clear of anything that burns and never heat with a gas oven. See our emergency furnace repair guide for more.
Furnace tune-ups and maintenance
A yearly tune-up catches worn ignitors, dirty flame sensors, weak blower motors and venting problems before they leave you without heat, and many manufacturers expect it to keep warranties in force.
| Tune-up | Price |
|---|---|
| Gas or electric furnace tune-up | $230 ($180 for Home Comfort Club members) |
| Heat pump tune-up | $230 ($180 for Home Comfort Club members) |
| Oil furnace tune-up | $336 ($288 for Home Comfort Club members) |
Prices as of September 2026. Home Comfort Club membership starts at $15 a month (membership plans). More on our maintenance page.
Furnace replacement in Mount Vernon
When a furnace is 15 to 20 years old or more, keeps breaking down, or has a cracked heat exchanger, a replacement usually costs less over time than more repairs. A quick check: if the furnace's age times the repair price is over $5,000, get a replacement price too.
Your price depends on your home's heating needs, the add-ons you need, how many rooms the system serves and where it is installed. Get a range in about 30 seconds with our instant quote tool, then a technician confirms the exact price on a free site visit. Every installation includes a room-by-room load calculation (ACCA Manual J), the required permits and a 1-year labor warranty on the installation.
Cascade Natural Gas rebates for Mount Vernon homes
| Upgrade | Cascade rebate |
|---|---|
| Gas furnace, 95% AFUE or higher | $1,600 |
| Gas furnace, 98% AFUE or higher | $2,400 |
| Programmable or Wi-Fi thermostat | $150 |
| Duct sealing | $1,000 |
For installs on or after 15 March 2026 in homes where Cascade gas is the main heat; apply within 90 days. Read on cngc.com on 9 October 2026. We handle the rebate paperwork. The federal 25C tax credit ended on 31 December 2025.
Financing is available through Salal Credit Union or Synchrony, with plans from $179/month* and 0% interest options for qualifying customers (financing).
Get an estimateYou approve a written, upfront price before any work begins.
*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.
Gas, electric, oil or heat pump?
| Heat source | In Mount Vernon | What we do |
|---|---|---|
| Natural gas furnace | Gas from Cascade Natural Gas | Repair, tune-ups, high-efficiency replacements with Cascade rebates. |
| Electric furnace | Power from Puget Sound Energy | Repair and replacement; a heat pump usually cuts the bill and earns PSE rebates. |
| Oil furnace | Fuel delivered by your supplier | Oil furnace tune-ups and repairs, and conversions to a heat pump. |
| Heat pump | PSE power | See heat pumps in Mount Vernon. |
A recent Mount Vernon furnace repair
In September a Mount Vernon furnace kept shutting off early. Our technician replaced the high-temperature limit switch, the safety device that shuts the burners off if the furnace overheats, and tested the system. The furnace then ran longer, which revealed a second problem: a relay on the control board was chattering, so the blower never ramped up to full speed. He recommended replacing the control board and low-voltage transformer, then confirming the blower motor. The furnace was past its manufacturer warranty and showed no service history, so he also gave the homeowner the option to consider a replacement.
From our September 2026 service records; customer details are kept private. Photo: a Home Comfort Alliance technician on another furnace call.
What you get with Home Comfort Alliance
- A NATE-certified technician and an upfront, written price before any work begins.
- After-hours heating service in Mount Vernon for no-heat emergencies.
- Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD).
- Every major furnace brand serviced. We are a Carrier Factory Authorized Dealer and a Lennox Premier Dealer.
- BBB Accredited Business since 2002, ACCA member, Best Pick 2025 and 2026.
- Locally owned since 1977.
Where we provide heating service around Mount Vernon
Our Everett branch covers Mount Vernon and nearby Burlington, Sedro-Woolley, La Conner, Conway and Clear Lake. Inside Mount Vernon city limits, furnace replacements need a mechanical permit from the City of Mount Vernon Development Services, and electrical permits come from WA L&I; outside city limits, Skagit County issues permits. We pull the required permits for every installation. Further south, see our Everett, Lake Stevens and Snohomish pages.
Mount Vernon heating FAQ
Who should I call for furnace repair in Mount Vernon, WA?
Call Home Comfort Alliance at (425) 645-0404. Technicians from our Everett branch repair gas, electric and oil furnaces in Mount Vernon, and phones are answered 24/7.
Do you offer after-hours heating repair in Mount Vernon?
Yes. Our heating technicians take after-hours no-heat calls in Mount Vernon, with a $330 after-hours fee.
How much does furnace repair cost in Mount Vernon?
Most repairs run $139 to $544, averaging $341 (Angi Seattle-area estimate, August 2026). Our dispatch fee is $119 and the standard diagnostic is $72, listed separately.
How much is a furnace tune-up?
$230, or $180 for Home Comfort Club members. Oil furnace tune-ups are $336, or $288 for Home Comfort Club members.
What rebates does Cascade Natural Gas offer for a new furnace?
As of October 2026, $1,600 for a 95% AFUE furnace and $2,400 for a 98% AFUE furnace, plus $150 for a programmable or Wi-Fi thermostat and $1,000 for duct sealing, for homes where Cascade gas is the main heat. We handle the paperwork.
Why does my furnace keep shutting off?
An overheating limit switch, a clogged filter, a dirty flame sensor or a failing control board are common causes. A technician checks each one during the diagnostic.
Do you work on oil furnaces?
Yes. We tune up and repair oil furnaces, and we can convert an oil-heated home to a heat pump.
Should I replace my furnace or switch to a heat pump?
Gas homes often replace the furnace with a high-efficiency model and use Cascade rebates, or add a heat pump and keep the furnace as backup. Electric and oil homes usually save most with a heat pump.
Do I need a permit to replace a furnace in Mount Vernon?
Yes. Inside city limits the City of Mount Vernon issues the mechanical permit; electrical permits come from WA L&I. We pull the required permits for every installation.
Is a replacement estimate free?
Yes. Replacement and installation estimates are free. Repair visits carry a $119 dispatch fee.
Why Choose Home Comfort Alliance in Mount Vernon?
Your Comfort is Our Promise
We 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.
Book heating service in Mount Vernon
Tell us what your furnace is doing or what you want to replace. A heating technician from our Everett branch will give you a written, upfront price before any work begins.
Request heating service
Our team will call you to set up your visit. For no heat after hours, call (425) 645-0404.