Furnace Replacement
Repair-or-replace advice with real numbers, then a fast swap of the old unit.
About This Service
What's Included
- Ignition, flame sensor and burner operation
- Blower motor, capacitor and belt
- Heat exchanger visual inspection and carbon monoxide test
- Venting, draft and gas pressure
Signs You Need Furnace Replacement
If any of these sound familiar, it's time to schedule service.
No heat or the furnace will not start
Short cycling
Blowing cold air
Loud banging, squealing or rattling
Furnace Replacement: Photos From Our Jobs
Real photos from MrFixer service calls around the Denver metro — not stock images.




Frequently Asked Questions
Common questions about furnace replacement in Colorado.
Should I repair or replace my furnace?
We look at age, the cost of the repair, safety and efficiency. If a repair is a reasonable share of a new system and the furnace is safe, we will tell you to repair it.
Does altitude affect my furnace?
Yes. Gas furnaces in the Denver area need to be set up for altitude so they burn correctly. We check combustion during every repair and installation.
Is a furnace emergency dangerous?
If you smell gas, leave the house and call your gas utility from outside. For no-heat calls, we prioritize homes with children, older adults or freezing temperatures.
Furnace Replacement Across the Denver Metro
Local HVAC pages for every community we serve.
Related Services & Resources
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