Riverside service van on a River Valley street

Veteran-Owned • Licensed in Arkansas and Oklahoma • Calls answered 24/7

Furnace Blowing Cold Air

Cold air from the vents usually means the burners aren’t lighting or the fan is set to run on its own. Here’s what to check and when to call.

Calls answered 24/7: (479) 616-1364. No heat? Call any time and tell us what the system is doing.

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Short answer: Cold air from a furnace usually means the burners didn’t light, the flame sensor (a small rod that confirms the burner lit) isn’t seeing the flame, or the thermostat fan is set to On instead of Auto. Check the thermostat first, then call if the heat doesn’t come back.

Still getting cold air after the checks below? Call us, and a technician will find the cause. We handle heating systems repair across the River Valley.

Riverside Heating Air Plumbing team

What you can check

  1. Make sure the thermostat is set to Heat and the fan is on Auto, not On.
  2. Replace a dirty filter and open any closed vents.
  3. Check the furnace power switch and the breaker once. If the breaker trips again, leave it off.
  4. If you smell gas, leave the house and call the gas company from outside.
  5. Listen for a small fan starting, then a click as the furnace tries to light. Tell the technician what you hear.

When to call

Call if the house keeps getting colder, a breaker trips, you smell gas or burning, or the furnace tries to light and then shuts down again. We fix furnaces in Fort Smith, Van Buren, Greenwood, and Alma.

Prefer not to call? You can request a visit through Book Online. Add a note that the furnace is blowing cold air.

Leave anything inside the furnace cabinet, like safety switches and gas parts, to a trained technician.

Why a furnace blows cold air

The usual causes are simple to describe, even if they take a technician to fix. The ignitor (the part that lights the gas) may be worn out, so the burners never light. The flame sensor may be dirty, so the furnace shuts the gas off a few seconds after lighting. A clogged filter can make the furnace overheat and shut the burners off while the fan keeps running. Our technician tests each of these before replacing anything, so you aren’t paying for guesses.

We handle heating systems repair across the River Valley, including furnace repair in Fort Smith and furnace repair in Van Buren. Our Fort Smith office and Van Buren office answer calls any time. If your furnace is older and keeps blowing cold air, ask us whether to repair or replace it.

Is it safe to keep running?

A furnace that blows cold air isn’t heating the house, so the rooms will keep cooling off. Don’t keep restarting it if it keeps failing, and don’t open the burner area yourself. If you have a heat pump with a furnace as backup, a few minutes of cooler air can be normal while the outdoor unit melts off ice. If it doesn’t warm back up, call.

Our technicians handle heating repair across Fort Smith, Van Buren, Greenwood, and Alma.

If you smell gas or a carbon monoxide alarm goes off, get everyone outside and call 911 or the gas company. For everything else, call us any time, day or night, or book online with a short note about what the furnace is doing.

Want a technician to take a look?

Call us or book online. Calls are answered 24/7, and a technician explains what was found before any repair starts.