24/7 Emergency HVAC Service in Denver, CO

Call (303) 949-8584 Schedule Free Estimate

HVAC systems don't fail on weekdays at 10am. They fail at midnight on the coldest night of the year, or during a 100°F heat wave on a Saturday. Lou's Heating & Cooling is available 24 hours a day, 7 days a week, including holidays. We understand that a furnace failure at 11pm with a family in the house is a real emergency, not a "leave a message and we'll call you Monday" situation.

Signs You Need Emergency Service

No heat in freezing temperatures
No cooling during a heat event
Gas smell near furnace or HVAC equipment (call gas company first, then us)
Carbon monoxide alarm going off near furnace
Complete system failure, won't power on
Flooding from condensate or water heater near HVAC equipment

What to Expect

Call us now
Call (303) 949-8584. A real person answers or calls you back immediately. We don't use an answering service that schedules you for next week.
Safety first
For gas smells: leave the building and call your gas company (Xcel Energy: 1-800-895-2999) before calling us. For CO alarms: evacuate and call 911 first.
Rapid response
We aim to reach you within 2-4 hours for emergency calls in the Denver metro area, depending on location and time of night.
Honest diagnosis
Even at 2am, we give you the straight story. We tell you what's wrong, what it costs to fix, and whether a repair or temporary solution makes more sense.

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

"If I could I would give at least 10 stars. I have a Breezair system that is starting to show its age. I had read reviews from others about nightmares with the electronics going out on them. I was prepared to face an enormous bill based on what I'd seen. Lou and his partner came out, did a thorough cleaning of the unit and had it up and running in no time. I asked what the issue was with the unit and was informed it was just a loose connection. What a refreshing relief to find someone so honest. Stuck to the original quoted price. Very friendly also. I can imagine if I had called one of the larger "service provider" companies, I would have been informed I need a new unit. Would recommend this company for any of your HVAC needs. Thanks again for your honesty."

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

Emergency FAQs

What counts as an HVAC emergency?

No heat in freezing temperatures, no AC during a heat event, gas smell near the furnace, CO alarm activation, or a system that won't power on at all. For gas smells, leave the house and call your gas company first. For CO alarms, evacuate and call 911.

How fast can you get to me at night?

We aim for 2-4 hours across the Denver metro depending on location and severity. We pick up the phone, give you a realistic ETA, and don't promise what we can't deliver.

Will I pay extra for emergency service?

Emergency calls carry a modest after-hours premium over our normal service rates — we tell you exact pricing on the phone before we head out. No mystery surcharges added afterward.