Furnace & Heating Repair Across the South Bay
Repairs, replacements, and tune-ups that keep your home warm and safe, from the family-run Morgan Hill team trusted since 2009.
Licensed & insured, CA CSLB #935704 · All brands · Financing available
We answer 24/7 (408) 497-0444
Request service or a free estimate
Heat You Can Count On, Service You Can Trust
When the temperature drops on a South Bay night, a furnace that won’t fire is more than an inconvenience. Modern Air gets an experienced technician to your door to diagnose the problem, explain it plainly, and quote the repair before any work begins. We’ve kept homes warm from Morgan Hill to San Jose to the Santa Cruz mountains since 2009, and safety comes first on every call. Andrew’s standing instruction to the crew is to make sure it’s done right, and he’d rather pay his techs overtime to finish a job properly than have them rush it and get a callback.
Repair, Replacement, and Tune-Ups
- Furnace repair, Ignitors, flame sensors, gas valves, blower motors, control boards, limit switches, and thermostats. We carry common parts and finish most repairs in a single visit.
- Furnace & system replacement, Right-sized equipment installed to code, with a clear walkthrough of your options. Replacing an aging gas furnace is also the natural moment to consider a high-efficiency heat pump.
- Heating tune-ups, A thorough fall inspection that verifies safe combustion, clean components, and efficient operation so winter doesn’t catch you off guard. Two of these a year come with the maintenance plan.
Safety First, Always
Heating equipment burns fuel and moves a lot of air, so Modern Air treats every furnace call as a safety check, not just a repair. We inspect heat exchangers, verify combustion, and confirm your system is venting properly. If we find a genuine hazard we’ll tell you clearly, but we’ll never invent one to scare you into a sale. Honest assessments are the whole point.
Repair or Replace? Straight Numbers, No Pressure
A 12-year-old furnace with a $250 fix is worth repairing. A 22-year-old unit that’s failed three winters in a row probably isn’t. When you’re at that crossroads, Modern Air shows you repair-versus-replace costs side by side, including any heat pump rebates you may qualify for, and lets you choose. Based on Modern Air’s service experience, most repairs land between $223 and $2,899, while a typical full system replacement runs $1,683 to $10,392 installed. Seeing both numbers in writing makes the decision a lot easier, and our HVAC cost breakdown explains what moves a quote within those ranges. If the heat is already out, emergency service gets you a technician the same day.
Andrew’s sales philosophy is simple: we lay out your options, answer your questions, and you tell us what you want. The plan an experienced technician quotes is the work our installers carry out.
Backed by a Real Warranty
Furnace installations carry a three-year labor warranty and repairs a two-year labor warranty, on top of the manufacturer’s equipment coverage. Andrew has honored that warranty even after it expired when the problem traced back to our craftsmanship. Free estimates on new systems, upfront repair pricing, and financing through Wisetack come standard. Call or text (408) 497-0444 to get your heat back on.
A Simple, Transparent Process
Call or text us
(408) 497-0444, or send the form and we reach out the same day.
Same-day diagnosis
A local, background-checked tech finds the problem and quotes it upfront.
Fixed right, guaranteed
Clear pricing before work starts. Financing if you need it.
All Major HVAC Brands
What South Bay Customers Say
“Andrew was pleasant, professional & found the problem quickly & replaced the furnace part quickly.”
Joy S.San Martin · Furnace repair“I’m so happy I found Modern Air. Both visits have resulted in speedy and accurate diagnosis and resolution of my heater and AC issues. Can’t recommend enough.”
Dyan S.San Jose · Furnace repair“The young man Issac is Very professional and very knowledgeable on heating and air conditioning. I highly recommend them . Excellent customer service!! I’m very happy with their service today! Thank you very much…”
Mary E.Hollister · Furnace repairFrequently Asked Questions
How much does furnace repair cost?
It depends on the failed component and your system, so Modern Air provides upfront pricing after diagnosis rather than a phone guess. Estimates on furnace replacements are always free, and financing is available through Wisetack.
Is my furnace safe to keep running?
A furnace that’s short-cycling, producing yellow flames, or tripping its safety sensors should be inspected before you keep running it. We check heat exchangers and combustion on every visit and will tell you straight if there’s a carbon monoxide or safety concern, no scare tactics, just facts.
When should I replace my furnace instead of repairing it?
Furnaces generally last 15 to 20 years. If yours is in that range, failing repeatedly, or running up your gas bill, replacement may save money over time, and these days a heat pump is often the better, rebate-eligible option. We’ll lay out the real costs both ways and let you decide.
Do you service all furnace brands?
Yes, Trane, Lennox, Carrier, Rheem, Goodman, American Standard, and more, both gas and electric. As a Trane dealer we install equipment we can warranty.
When is the best time for a furnace tune-up?
Early fall, before the first cold snap, is ideal, September is the sweet spot in the South Bay. A pre-season tune-up catches small problems before they leave you without heat on the coldest night.
Schedule Your Free Estimate Today
Call, text, or send the form, a local technician gets back to you the same day.
Call or Text (408) 497-0444