Fast, reliable furnace repair services for homes in Longmont and Boulder County. We diagnose issues quickly and get heat back on as soon as possible!

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Common Furnace Problems We Fix

  • No heat or weak airflow
  • Strange noises or burning smells
  • Furnace turning on and off frequently
  • Thermostat not working properly
  • Cold spots throughout your home

Why Homeowners Trust Us for Furnace Repair

We diagnose furnace issues quickly and accurately — no guesswork
Honest recommendations with no upselling or pressure
Hands-on experience with Colorado’s toughest winter conditions
A local, family-run company you can trust in your home.

Furnace Repair in Longmont & Surrounding Areas

  • Longmont
  • Boulder
  • Erie
  • Lafayette
  • Louisville
  • Niwot
  • Frederick
  • Firestone

Need Furnace Repair Today?

Call Loos & Sons HVAC for fast, dependable furnace repair you can trust. We proudly serve Longmont and Boulder County with honest, reliable service.

Call Now – Same Day Service Available