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Why does my furnace click when it shuts off?

By Emma Payne |

Why does my furnace click when it shuts off?

Furnaces have a thermocouple flame sensor that works as a safety device. The thermocouple is likely reacting to an abnormal flame temperature and shutting off the gas automatically. If you furnace begins clicking and the blower turns on and off again, this may indicate a faulty flame sensor.

Why is my gas furnace clicking?

The common sources of a furnace clicking sound are: Gas valve — A broken, jammed, or clogged valve may fail to let out gas. Flame sensor or thermocouple — This part senses the presence of a flame and tells the gas valve to open. If it’s faulty or dirty, it won’t send the signal and the ignitor will click.

What does it mean when your furnace is clicking?

Clicking from gas furnaces often indicates a problem with the gas valve or ignitor—and you certainly don’t want a gas leak. Gas valve — A broken, jammed, or clogged valve may fail to let out gas.

Why does my AC keep clicking on and off?

If you hear one loud click as the AC tries to turn on, there’s a problem with the controls. The culprit could be the capacitor, control board or thermostat. If the clicking happens repeatedly until you manually turn off the AC at the thermostat, the controls might be fine but some other part is refusing to do its job.

Why does the ignitor on my gas stove keep clicking?

The ignitor will keep clicking as it tries to spark a flame. This could indicate a dangerous gas leak or clogged gas valve. Irregular clicking sounds coming from the gas valve could also be a sign of insufficient voltage. This might be caused by faulty gas meter controls or the thermostat controls.

What to do when your furnace wont turn on?

If you don’t feel comfortable doing this task, call a specialist.If the pilot light is out and refuses to light, gas might not be flowing into the furnace. Verify that the gas valve switch is at the “On” position. If it is on, the pilot light might be dirty.

Why is my furnace making a clicking noise and giving heat?

Most likely, your furnace is making a clicking noise and not providing heat because your furnace’s spark igniter is trying to ignite your pilot light or burners but is failing to do so. In other words, there’s an ignition system malfunction that needs to be fixed.

If you don’t feel comfortable doing this task, call a specialist.If the pilot light is out and refuses to light, gas might not be flowing into the furnace. Verify that the gas valve switch is at the “On” position. If it is on, the pilot light might be dirty.

The ignitor will keep clicking as it tries to spark a flame. This could indicate a dangerous gas leak or clogged gas valve. Irregular clicking sounds coming from the gas valve could also be a sign of insufficient voltage. This might be caused by faulty gas meter controls or the thermostat controls.

What to do if your furnace pilot light is out?

Pilot light problems: Relight the furnace’s pilot light if you notice that it’s out. If you don’t feel comfortable doing this task, call a specialist.If the pilot light is out and refuses to light, gas might not be flowing into the furnace.