Furnace repair in Denver, done right.

When a furnace quits in Denver, it rarely picks a convenient night. Besties HVAC Solutions repairs gas, electric and high-efficiency furnaces across the metro with the same white-glove standard we bring to every home and property we care for: floor protection down, a clear diagnosis, a written price you approve before any work starts, and a workspace left cleaner than we found it.

Our technicians are EPA-certified, background-checked and insured. We work on all major makes, and we stock the parts that fail most often so many repairs are finished on the first visit.

Signs your furnace needs repair

• The blower runs but the air from the vents is cool or lukewarm
• The furnace starts, runs a few minutes, then shuts off (short cycling)
• Clicking with no ignition, or an igniter that glows but never lights the burners
• Rumbling, squealing or banging when the burners light or the blower starts
• A yellow or flickering flame, soot around the cabinet, or a sharp smell that lingers
• Rooms that used to heat evenly are now several degrees apart
• Gas bills climbing even though your thermostat settings have not changed

If a carbon monoxide alarm sounds or you smell gas, get everyone out of the house first and call Xcel Energy or 911 from outside. Call us once everyone is safe and the utility has cleared the home.

Why Denver furnaces fail differently

At 5,280 feet the air holds less oxygen than at sea level. Many furnace manufacturers call for derating gas input at altitude, commonly around 4 percent per 1,000 feet, and some models need a high-altitude kit or orifice change. A furnace set up with sea-level numbers can run hot, trip its high-limit switch, stress the heat exchanger or short cycle. On every repair we check gas pressure, temperature rise and combustion against the manufacturer's altitude guidance, not only the part that failed.

Denver's dry, dusty air matters too. Filters load faster during construction season and wildfire smoke events, and a clogged filter is one of the most common reasons a furnace overheats and shuts itself off. Cold snaps that push overnight lows below zero put every weak component under maximum load at once, which is why so many failures land on the coldest night of the year.

Repair or replace? An honest answer

We never push a replacement to make a sale. As a rule of thumb, if your furnace is under about 12 years old and the repair is modest, repair it. If it is 15 to 20 years old, the repair costs more than a third of a new system, or the heat exchanger is compromised, it is time to price a replacement. When replacement makes sense, the estimate is free, financing is available, and qualifying high-efficiency equipment may be eligible for utility rebates. Our furnace installation page explains what a proper replacement includes.

What furnace repair typically costs in Denver

Typical range, exact quote after diagnosis. Repair work carries a $250 minimum. If a heat exchanger is cracked, replacement is usually the safe and economical answer, and we will show you exactly what we found.

Included with every visit

• Complete safety check including combustion analysis and a carbon monoxide test
• Gas pressure and temperature rise verified against altitude specs
• Flame sensor, igniter and burner inspection
• Filter check, replaced if needed
• A written price before any work begins
• Done-right guarantee: if something is not right, we come back and make it right

Want priority service and free diagnostics all year? See Comfort Club maintenance plans, or contact us with questions.