Furnace Repair in Denver, CO

Call (303) 949-8584 Schedule Free Estimate

A furnace that quits in a Denver winter isn't just uncomfortable; it's a genuine emergency. Denver's winter design temperature sits around 1-5°F, and temperatures can swing 40+ degrees in a single day. When your furnace stops working, you need someone who picks up the phone, shows up fast, and tells you exactly what's wrong. Lou's Heating & Cooling has been handling furnace repairs across the Denver metro since 2014. We answer calls 24/7 because we know furnaces don't care what time it is.

Signs You Need Furnace Repair Service

Furnace won't turn on
Blowing cold or lukewarm air instead of heat
Furnace cycles on and off frequently (short-cycling)
Unusual smells: burning, musty, or gas-like odors
Strange noises: banging, rattling, squealing, or rumbling
Pilot light or igniter issues (won't stay lit)
Yellow or orange pilot flame instead of blue
Carbon monoxide detector alarming near the furnace
Dramatically higher gas bills without usage change

What to Expect

Call us, 24/7
Call (303) 949-8584 any time. We answer emergency calls around the clock.
Safety check first
We check for carbon monoxide, gas leaks, and combustion safety before diagnosing the performance issue. Safety always comes first.
Full diagnosis
We inspect the heat exchanger, burners, igniter, flame sensor, blower motor, and controls. We tell you what we found in plain language.
Flat-rate quote
You get a price before we start any work. No hourly surprises.
Repair and test
We fix it and run the system through a full heating cycle to confirm everything is working correctly and safely.

Our Commitment to You

Flat Rate Pricing

You get a price before we start any work. No hourly surprises, no hidden fees.

Free Estimates

Free in-home estimates on all installations. No obligation to move forward.

10-Year Warranty (New Equipment)

All new installations include a 10-year extended parts warranty plus our 5-year workmanship warranty.

24/7 Emergency Service

HVAC doesn't break on schedule. We answer calls around the clock.

What Our Customers Say

"Lou was great - very patient and explained everything to me several times, got a new furnace installed quickly and was available to ask questions even on a Saturday night. Highly recommend!"

"Lou called me as soon as I submitted the request and got our furnace up and running!"

Furnace Repair FAQs

Why is my furnace blowing cold air?

Most often a tripped high-limit switch from overheating (commonly caused by a clogged filter). Other causes: pilot or igniter failure, a faulty flame sensor, or a thermostat issue. Change the filter first; if cold air persists, call us at (303) 949-8584.

Are you available 24/7 for furnace emergencies?

Yes — a real person answers, day or night. We can typically reach Denver-metro homes within 2-4 hours for emergency furnace calls. No answering services, no "we'll call you Monday."

How much does furnace repair typically cost?

Common Denver furnace repairs run $150-$700 depending on the issue. Igniters and flame sensors are on the low end; blower motors and gas valves are higher. Flat rate, quoted before any work starts.

Will you check carbon monoxide as part of the diagnosis?

Yes — every furnace service includes combustion safety checks: heat exchanger inspection, CO measurement at registers, and gas pressure verification. Safety always comes before performance diagnosis.