Signs You Need Furnace Repair
- No heat at all
- The furnace blows cold air
- It turns on and off frequently
- Banging, squealing or rumbling noises
- A yellow or flickering burner flame
- Some rooms much colder than others
Our Furnace Repair Process
- Check the thermostat, filter, power and gas supply
- Inspect ignition, flame sensor, burners and safety controls
- Check venting and for carbon monoxide risks
- Explain repair options and pricing
- Repair and test through a full heating cycle
Why Choose Zenith?
Diagnosis before recommendations
We find the actual cause — with a camera or test equipment when needed — before suggesting a repair.
Options and pricing up front
You'll hear your options and the price before any work begins, so there are no surprises.
Plumbing and HVAC under one roof
Drains, sewer lines, water heaters, furnaces and AC — one team that knows your whole home.
Respect for your home
Shoe covers, protected work areas and a clean jobsite when we're done.
Furnace Repair Service Areas
Zenith provides furnace repair across the Denver metro and Front Range, including:
Frequently Asked Questions
Why is my furnace blowing cold air?
Common causes are a thermostat fan set to ON, a clogged filter, a dirty flame sensor or an ignition problem. If basic checks don't fix it, call us.
What should I do if my carbon monoxide alarm goes off?
Get everyone out of the house immediately and call 911 or your gas utility's emergency line from outside. Don't go back in until it's declared safe.