How to Safely Troubleshoot Your Furnace

Cool Talk with Hartzell's | Your HVAC Questions, Answered! · Oct 8, 2026 · 23m · transcript

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HOST A: It is the first cold morning of the year in Kingfisher. Thirty eight degrees outside. You walk to the thermostat, you turn it up, and nothing happens. Or the fan blows, but the air coming out of the vents is cold. HOST B: And that is my busiest morning of the fall. Every year, the first cold front comes through and I get a stack of calls before breakfast. Some of those I can fix over the phone in two minutes. Some of them, I tell the homeowner to step outside and call the gas company. T

I'm Dave Hartzell at Hartzell's Heat & Air in Kingfisher, Oklahoma. 47 years in…