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!

Call Today!

Common Furnace Problems We Fix

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

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