Expert furnace repair for all makes and models. 24/7 emergency heating repair available. NATE Certified technicians Licensed in 8 Colorado jurisdictions.
A broken furnace in a Colorado winter isn't just uncomfortable — it can be dangerous. On Time Heat & Air provides 24/7 emergency furnace repair throughout the Denver metro area. Our NATE Certified technicians have extensive experience with gas furnaces, electric furnaces, and dual-fuel systems. Common furnace problems we fix include ignition failures, blower motor issues, cracked heat exchangers, thermostat malfunctions, and strange noises. We provide upfront pricing before any work begins — no surprises on your bill.
Our NATE Certified technicians have the training and real-world experience to handle any furnace repair job. We hold active licenses in 8 Colorado jurisdictions — Adams, Arapahoe, Aurora, Broomfield, Commerce City, Denver, Douglas, and Jefferson — so we're authorized to work anywhere in the Denver metro. We provide upfront pricing, honest recommendations, and stand behind every job.
Select your city for location-specific furnace repair information:
Fast diagnosis and repair for all AC brands. Same-day emergency service available 24/7.
Professional central air installation and replacement. Free estimates on all new systems.
New furnace installation and replacement. Energy-efficient systems with financing options.
Heat pump installation, repair and maintenance. Year-round comfort, energy-efficient.
Annual AC tune-ups and maintenance to extend system life and keep energy bills low.
Free tips and guides from our NATE Certified team:
⚠️ New 2026 Colorado Furnace Regulations Are Here
Learn How New Ultra-Low NOx Requirements Affect Your Furnace →Colorado winters don't wait for convenient timing. When your furnace goes down at 11 PM on a Saturday in January, you need someone who answers the phone and shows up — not a voicemail that says "we'll call you Monday." We provide 24/7 emergency furnace repair with no overtime fees.
The most common furnace problems we see in the Denver Metro are dirty flame sensors, failed ignitors, and blower motor issues. At altitude, furnaces work harder — the thinner air affects combustion, and our long heating season means furnaces run 5-6 months per year. Components wear out faster here than in milder climates.
We inspect the heat exchanger on every furnace repair call. A cracked heat exchanger can leak carbon monoxide into your home without any warning smell. If we find a crack, we'll tell you honestly — and help you decide whether repair or replacement makes more financial sense.
See our furnace repair cost guide for detailed pricing on common repairs.
Common questions from Denver Metro homeowners.
Most furnace repairs in the Denver Metro cost $150 to $700. Ignitor replacements run $150–$350, blower motors $300–$700, and heat exchanger issues $1,000–$3,500. We provide upfront pricing before starting any work.
The most common causes are a tripped breaker, a dirty flame sensor, a failed ignitor, a clogged filter, or a thermostat issue. Check your breaker and filter first. If those are fine, call us — our NATE-certified techs can usually diagnose and fix it the same day.
Yes. A cracked heat exchanger can leak carbon monoxide into your home. If your CO detector goes off, leave the house immediately and call us at (720) 527-0668. We inspect the heat exchanger on every furnace repair call.
Yes. We provide 24/7 emergency furnace repair across the Denver Metro. When your heat goes out during a Colorado winter, we treat it as urgent. Call (720) 527-0668 any time — a real person answers.
Most furnace repairs are completed in 1–3 hours. Simple fixes like ignitor or flame sensor replacements take under an hour. More complex repairs involving control boards or blower motors may take 2–3 hours. We carry common parts on our trucks for same-visit repairs.
Serving Henderson, CO too — Furnace Repair in Henderson →