What does a furnace tune-up include?
A tune-up is a seasonal visit: heating inspection, filter check, safety test, and written findings. Ignition, the heat exchanger, electrical, and venting are covered by the tech, not left to the homeowner.
FAQ
Furnace tune-up in Thornton and the Denver metro: what it covers
A fall furnace tune-up is a seasonal visit — heating inspection, filter check, safety test, written findings. Here's what happens, what you can do first, and how to request a visit.
Smell gas? Leave the house right away without touching switches or the thermostat, and call your gas utility from outside. Once it's safe, request a visit for repairs.
Fall Heat Ready specials (offer ends November 1, 2026): Furnace startup — $120 · Duct cleaning — from $350 · Startup + duct cleaning combo — from $375 · 10% off humidifier or UV installs
Hours: Monday–Friday, 8 AM–5 PM · Emergency available
What the visit covers
1
Heating inspection
We look over the heating system before the first cold night finds the problem for you: ignition, burners, the heat exchanger, electrical connections, and the venting.
2
Filter check
We check the filter and tell you the size and how often your house needs a new one. Swapping filters between visits is a homeowner job — we'll show you where it goes.
3
Safety test
We run a safety test on the furnace. Ignition, the heat exchanger, electrical, and venting are the tech visit, not DIY.
4
Written findings
You get written findings in plain language. If something needs repair, you decide — no pressure, and nothing gets replaced without your OK.
5
What you can do first
Put in a fresh filter, open the supply registers, and clear boxes and furniture away from the returns and the furnace closet. That takes a cheap problem off the list before we get there.
More on the fall visit: tune-up page. If the furnace already won't heat, start with the furnace not heating FAQ.
When should I get a furnace tune-up in Thornton?
Fall, before the first real cold snap. The first night the heat comes on is when a lot of Denver metro houses find out the furnace sat all summer. Booking ahead of that first cold week is easier than an emergency call.
How much does a furnace tune-up cost?
Seasonal tune-ups are quoted per visit. This fall the Fall Heat Ready specials are on (the offer ends November 1, 2026): Furnace startup — $120 · Duct cleaning — from $350 · Startup + duct cleaning combo — from $375 · 10% off humidifier or UV installs. Request a visit and tell us what you need.
Do you do tune-ups outside Thornton?
Yes. Fall furnace tune-ups run across our whole service area: Thornton, Aurora, Arvada, Westminster, Broomfield, Superior, Firestone, Brighton, Lakewood, Centennial, Highlands Ranch, Parker, Littleton, Englewood, Commerce City, and the North Denver metro north of 136th Avenue and I-25 — plus the wider Denver metro and Front Range. If your zip isn't listed, send it anyway.
When can I book a tune-up?
Our hours are Monday–Friday, 8 AM–5 PM. Request a visit and we'll set a window. The Fall Heat Ready specials end November 1, 2026.
What if I smell gas?
Smell gas? Leave the house right away without touching switches or the thermostat, and call your gas utility from outside. Once it's safe, request a visit for repairs.
Will you try to sell me a new system?
Only if the one you have is actually done. We repair first. If replacement is the honest path, you'll get numbers and time to think.
Can I do my own furnace tune-up?
You can swap the filter and clear the vents. Anything behind a panel — ignition, burners, the heat exchanger, wiring, and venting — is a tech visit. Do not open panels.