Same-Day Service
Most service calls handled same-day across Spokane and Coeur d'Alene.
Furnace Maintenance
The cheapest furnace repair is the one that never happens.
An annual tune-up catches small problems before they become emergency repairs, restores up to 5% in efficiency loss, and keeps your manufacturer warranty valid. Most importantly, it includes a full carbon-monoxide safety check — a non-negotiable on any gas-burning appliance.
Care Club members get two annual visits, priority dispatch, and 15% off any repair work — all for less than the cost of a single emergency call.
- Safety first Combustion analysis and CO testing on every visit — non-negotiable.
- Efficiency restored Cleaning and calibration recover up to 5% in lost efficiency every year.
- Warranty preserved Most manufacturer warranties require documented annual maintenance.
- Failures caught early Cracked exchangers, weak igniters, and worn motors flagged before they fail.
Limited Time Offer
Furnace Maintenance Tune-Up
Trusted Tune-Ups & Inspections
- Certified Technicians
- Quick Repairs
- Emergency Service
- Quality Service
What We Repair
What's actually included
Not a 5-minute filter swap. A full hour with a NATE-certified tech going through every safety and performance system on your furnace.
- Burner inspection & cleaning Verify clean, blue flame; clean burners and flame sensor.
- Heat exchanger inspection Camera-based check for cracks — critical for CO safety.
- Combustion analysis Measure CO, draft, and combustion efficiency at the flue.
- Blower & motor service Lubricate motors, tighten belts, clean blower wheel.
- Gas pressure verification Verify and adjust gas pressure to manufacturer spec.
- Control & safety circuits Test limit switches, flame rollout, draft proving, and ignition.
- Condensate drain check Flush drain lines and test condensate pump operation.
- Thermostat calibration Verify accuracy and recommend smart thermostat upgrades if applicable.
How It Works
Booking a tune-up
Easy to schedule, easier to keep on the calendar.
-
Book online or by phone
Pick a window that works for you. We confirm 24 hours ahead.
-
On-site inspection
A NATE-certified tech runs the full 21-point inspection — typically 60–90 minutes.
-
Written report
Photos, readings, and any findings — emailed to you before the tech leaves.
-
Care Club option
Convert your visit to a Care Club membership for ongoing benefits and savings.
Why Choose Mainstream
Upfront Pricing
Flat-rate pricing approved before work begins — no surprises on the invoice.
Licensed & Insured
Fully licensed in Washington and Idaho, bonded, and insured for your protection.
Satisfaction Guaranteed
If it isn't right, we make it right. Period.
Beat winter with a 60-minute tune-up.
Same-day service across Spokane & Coeur d'Alene — flat-rate pricing, no surprises.
What Our Customers Say
Don't just take our word for it — hear from our satisfied customers
★★★★★
Anthony our HVAC Tech was, polite, and quite knowledgeable, and he did a great job checking all of our equipment out. We discovered a potential problem and scheduled some future maintenance to take care of it. So all went well, we are thankful, and we will use Mainstream once again.
★★★★★
Jake was on time and very good about looking at my furnace. I appreciate all his help. I reccomend him and mainstream electric very highly. thank you Sharon Scott
Maintenance Membership
Join the Care Club
Total home service care, on a schedule.
Members get priority scheduling, seasonal HVAC tune-ups, an annual plumbing & electrical safety inspection, and exclusive discounts — for less than the cost of a single emergency call.
- Priority scheduling
- Seasonal HVAC tune-ups
- Annual safety inspection
- Exclusive member discounts
- Free dispatch on repairs
- No long-term contracts
Frequently Asked Questions
How often should I tune up my furnace?
Once a year — ideally in early fall before peak demand. If you have a heat pump that runs year-round, schedule both a spring and fall maintenance. Care Club members get the visits handled automatically.
Will a tune-up actually save me money?
Yes — and the math is straightforward. Combustion efficiency drops 1–3% a year without service. Over a 5-month heating season, restoring that lost efficiency typically pays back the visit cost. Plus tune-ups catch problems before they become $1,000+ emergency repairs.
What's the carbon-monoxide check?
We measure flue-gas CO levels at multiple points and inspect the heat exchanger with a camera for cracks. A cracked exchanger is the most common cause of CO leaks in residential furnaces — and it’s rarely visible from outside the unit.
Do I need a tune-up if my furnace seems fine?
Yes. Furnaces that ‘seem fine’ are exactly when problems are easiest (and cheapest) to fix. Most furnaces give zero warning before a major failure — by the time you notice symptoms, you’re looking at a no-heat emergency in the middle of winter.
What's the Care Club?
Our annual maintenance membership: two visits a year (heating + cooling), priority dispatch, no overtime fees, $0 diagnostics, and 15% off all repairs. Most members save more on the discounts than the membership costs — and you don’t have to remember to schedule anything.
*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
