Monday-Friday 7AM-6PM

Schedule Service

Keep Your Heat Running Strong All Fall/Winter!

Protect your system and save on repairs with our comprehensive Heating Service Plans.

Call (303) 736-8151 today for plan options & pricing!

Furnace Repair

Reliable Furnace Repair in Castle Rock, CO

Emergency Heating Service When You Need It Most

When the temperature drops in Douglas County, a functional heating system isn’t just a luxury—it’s a necessity. At Avalanche HVAC, we provide rapid-response furnace repair in Castle Rock, Parker, and the surrounding South Metro area. Whether your furnace is making strange noises, blowing cold air, or refusing to turn on, our NATE-certified technicians have the tools and expertise to restore your warmth fast.

We service all major brands, including Carrier, Champion, Trane, and Lennox, ensuring your home remains safe and comfortable through the coldest Colorado nights.

Schedule Free Estimate

Call Now For Same Day Service on Your AC, Heater, Furnace, Boiler or Plumbing Repair In Castle Rock! (303) 736-8151

5 Signs Your Furnace Needs Immediate Professional Repair

Don’t wait for a total system breakdown. Contact us for heating troubleshooting if you notice:

Cold Air from Vents: If your furnace is running but the air is chilly, you could have a failed igniter, a faulty flame sensor, or a malfunctioning gas valve.
Loud Banging or Screeching: Unusual noises often indicate a slipped blower belt, worn-out motor bearings, or “delayed ignition” in the burners.
Short Cycling: If your furnace turns on and off every few minutes, it may be overheating due to a clogged filter or a failing limit switch.
A Yellow Pilot Light: A healthy pilot light should be blue. A yellow or flickering flame is a safety warning that your furnace is not burning fuel cleanly, potentially leaking Carbon Monoxide (CO).
Spike in Energy Bills: An inefficient furnace has to run longer to maintain the same temperature, causing your Xcel or CORE utility bills to skyrocket.

Our High-Altitude Repair Process
Repairing a furnace at 6,000+ feet requires specialized knowledge of air density and combustion. Our HVAC repair process includes:

Full Diagnostic: We don’t just fix symptoms; we find the root cause, from cracked heat exchangers to electrical shorts.
Safety Inspection: Every repair call includes a check of your flue pipe and a CO test for your peace of mind.
Upfront Pricing: You’ll receive a fixed-price quote before any work begins—no hidden “emergency” fees or hourly surprises.

Furnace Repair FAQ

Explore answers to the most common questions about our HVAC services, ensuring you stay informed and prepared.

What should I check before calling for furnace repair?

Before reaching out for repair, verify that your thermostat is set to ‘Heat’ and the temperature is above the current room temperature. Also, check your circuit breaker and ensure your air filter is clean. If these are in order, it’s time to contact a professional technician.

How much does furnace repair cost in Castle Rock?

Our typical service call and diagnostic fee ranges from $89 to $129. The total repair cost will depend on the parts required. We offer flat-rate pricing, so you’ll know the cost upfront before any work begins.

Is a furnace making a banging noise dangerous?

Yes, it can be hazardous. A loud bang when the furnace starts often indicates delayed ignition, where gas accumulates before igniting. This can eventually damage the heat exchanger. It’s advisable to turn off the system and call for repair immediately.

What maintenance can prevent furnace issues?

Regular maintenance is key to preventing furnace problems. Schedule annual inspections, replace filters every 1-3 months, and ensure vents are unobstructed. These steps can help maintain efficiency and extend the lifespan of your furnace.

How can I improve my furnace's efficiency?

To enhance efficiency, ensure your home is well-insulated, seal any drafts, and regularly clean or replace air filters. Additionally, consider upgrading to a programmable thermostat to optimize heating schedules and reduce energy consumption.

What Our Customers Are Saying

Glenn Bowman

Andy was fantastic, responsive and honest! I would recommend Avalanche hands down over anyone in the Castle Rock/South Metro area.

Andy Youngs

Jacob came & updated our HVAC /Tankless system. He was extremely knowledgeable & conscientious. Great company

Steve Hannah

Prompt, courteous and knowledgeable. Very satisfied with service. Andy and Wyatt were great in every way. Great confidence and trust in their their diagnosis and repair. Definitely recommend!

steven martinez

Andy did a great job!

Kent Foncannon

Great service, very nice and knowledgeable people that stand behind their work.

Elizabeth Katzman

Avalanche was absolutely wonderful to work with! Jacob did an excellent job, both on the installation of my new furnace, and communicating what he was doing and how everything worked. Jacob takes great pride in his work and was very careful to make sure everything was perfect. Highly recommend Avalanche!

Sutherlan Wilson

After our warranty company sent out a competitor and told us we'd be looking at a $600+ bill for cleaning our coil and blower to get our AC working again, we decided to get a second opinion with Avalanche and we couldn't be happier. Andy gave a courtesy call, arrived up on time with a friendly smile, and explained what he found in layman's terms. His honesty and expertise saved us that $600 when he discovered the previous company neglected to remove a piece of fallen insulation that covered the coils and was causing the AC to freeze over. You just don't find people as genuine, well-meaning, and with such integrity like Andy at Avalanche anymore and we are eternally grateful for his time and expertise. He has a customer in us for life now, when we aren't so fortunate with our hvac outcomes. Thank you Andy for saving the day!

Umed Saidov

Quick response, professional work, excellent customer service! They fixed my furnace the same day, while others only could schedule a visit two weeks out in middle of the cold weather. Definitely recommend them.

Verified by Trustindex

Trustindex verified that these reviews were published on Avalanche HVAC Services's Google Business Profile. Learn more

Service Areas

We proudly provide air conditioning installation to:

Castle Rock, CO
Parker, CO
Littleton & Centennial, CO
Highlands Ranch, CO
Elizabeth & Larkspur, CO