Furnace Won't Turn On? What to Check Before You Call in Kingman

Smell gas? Stop here

Get everyone out of the house first. Don't flip light switches, and don't start a car in an attached garage. From outside, call 911 or your gas company. Once everyone is safe, call us. The furnace can wait.

Five checks you can do safely

1. Thermostat. Set it to Heat, raise the setpoint a few degrees above the room temperature, and put the fan on Auto. If it runs on batteries and the screen is dim or blank, replace them. A surprising number of "dead furnace" calls end here.
2. The furnace switch and breaker. Most furnaces have a service switch on or near the unit that looks like a regular light switch. It gets bumped off more often than you would think, especially in a hall closet or garage. Check that one, then the breaker.
3. The filter. After a windy spring and a dusty monsoon season, a lot of Kingman filters come out gray and packed. A clogged filter starves the furnace of air, it overheats, and the high-limit switch shuts it down. From the hallway that looks exactly like a furnace that quit.
4. The drain on a high-efficiency furnace. If your furnace vents through white PVC pipe, it makes water and drains it. When that drain backs up, a float switch can cut power to the whole unit. If you see water in the pan or around the base, that is your clue.
5. Vents and the flue cap. Make sure supply registers are open and nothing is sitting on the return grille. If you can see the flue or roof cap from the yard, look for a nest. Birds and wasps like a flue that sat unused all summer.

If one of those brings the heat back, you're set. If the furnace still clicks and quits, or does nothing at all, stop resetting it and call.

What the symptoms usually mean

• Clicks, tries to light, then shuts off. Most often a dirty flame sensor or a weak hot surface igniter. The furnace lights for a few seconds, can't prove the flame is there, and shuts the gas off to be safe. It's one of the most common first-cold-night calls we get.
• Runs a few minutes, then quits. Usually a safety switch doing its job. A high-limit trip points to airflow: the filter, a dirty blower wheel or closed vents. A pressure switch trip points to the venting or the inducer motor.
• Blower runs, but the air stays cold. The furnace isn't lighting. That can be the igniter, the gas valve, the gas supply itself, or a control board that never tells it to light.
• Nothing at all. No hum, no click. Power or control: the switch, the breaker, a blown fuse on the control board, a float switch, a transformer or the thermostat wiring.
• One room is cold but the rest of the house is fine. That's usually the ductwork, not the furnace.

Why Kingman furnaces struggle on the first cold night

Kingman sits at about 3,300 feet, and freezing nights are normal from late fall into early spring. Your heating system sat idle from spring to now, collecting the same dust that blew through all summer. That dust coats the flame sensor, settles on the burners and builds up on the blower wheel. The first night it has to run for hours is when a weak igniter, a tired inducer motor or a dirty sensor finally shows up.

Elevation matters too. Furnaces are rated at sea level, and gas equipment should be set up following the manufacturer's high-altitude instructions. We check gas pressure against the spec for your unit, because a furnace that isn't burning right runs hot and trips its own safeties.

What we do when we get there

We test with meters, not guesses. That means checking the igniter, the flame sensor signal, the inducer, the pressure and high-limit switches, the gas valve, the control board and the blower. We also inspect the heat exchanger, because a cracked one is a carbon monoxide problem, not a comfort problem. We don't reset a safety switch and leave without finding out why it tripped.

Then we show you what we found and give you the repair price before any work starts. Most no-heat calls end in a repair. If your furnace is past 15 years, needs something every winter, or has a cracked heat exchanger, we'll price a replacement next to the repair so you can compare both numbers. You can read more about the parts we work on on our furnace repair page and our heating repair page.

If you heat with a heat pump instead of gas, the checks are a little different. We covered those in heat pump blowing cold air.

Head it off with a tune-up

A lot of what's on this page is cheaper to catch on a mild afternoon than at 2 a.m. on a freezing night. Our seasonal tune-up is $69 (normally $79) through December 31, 2026. It covers the flame sensor, burners, heat exchanger inspection, safety controls, venting and the blower. Here is what a fall furnace tune-up covers in more detail, and our maintenance plans if you'd rather not think about it every year.

Common questions

Why does my furnace click but not turn on? The clicking is usually the furnace trying to start. If it never lights, or lights and shuts off a few seconds later, a dirty flame sensor or a weak igniter is the most common cause. A safety switch can also be stopping it because of a blocked flue, a failing inducer motor or a clogged filter.

Is it safe to keep resetting my furnace? Once is fine. If it shuts down again, leave it off and call. A safety switch that keeps tripping is telling you something upstream is wrong, and resetting it over and over doesn't fix that.

Do you come out after hours for no heat in Kingman? We answer around the clock Monday through Saturday and are closed Sundays. A real person answers and gets our on-call technician moving.

Can a tune-up prevent this? Often, yes. A dirty flame sensor, a weak igniter and a packed filter are all things a fall tune-up catches before the first cold night.

We're a veteran-owned company based in Kingman, serving Kingman, Golden Valley, Bullhead City, Lake Havasu City and the rest of Mohave County, plus Prescott and Prescott Valley. Furnace won't turn on? Call (928) 565-6440, or text (928) 227-8441 and we'll get back to you.