The furnace quits on the first cold night
Denver heating calls pile up when the first real cold hits. Most of them are a furnace that sat all summer, not a dead house.
That week is when the phones ring
A Denver winter night lands in the teens, and some nights go below zero. The furnace has been off since spring. The first sustained cold, often October or November, is when it is asked to run hard again. Ignitors, flame sensors, and filters that were fine in September show up then. A second wave comes in December through February, after the system has already been working for weeks.
Furnace repair is the job Denver homeowners ask for first. Cooling matters in July. Heat is the one that cannot wait.
What you can check before you call
Set the thermostat to heat, and set it above the room temperature. Look at the filter. A filter packed shut will make a working furnace look dead. Check the breaker. If the furnace is high-efficiency, make sure snow is not blocking the intake and exhaust pipes outside.
A blank thermostat screen is often batteries or that breaker. It is worth thirty seconds before anyone drives over.
What that does not fix
A click and no flame, a furnace that starts and then shuts off, or a burning smell is a technician job. At 5,280 feet a gas furnace also has to be set for thin air. A yellow, lazy flame is a reason to stop guessing.
The visit starts with what the furnace is actually doing. If a part failed, that is the repair. If the system is the problem, we say that, with a written price before anyone is scheduled. Call (564) 888-5527. The shop is in Centennial and covers homes within 40 miles of Denver.