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Why does my furnace only work sometimes?

by Rhyley Bryan

Why does my furnace only work sometimes?

The Pilot Light (Faulty Ignition Sensor) The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite. This is typically the problem if you can hear your furnace click on but it does not fire up. Put the front panel back on, turn on the gas, and then turn the furnace back on.

Why won’t my furnace keep running?

Bad Thermocouple However, a malfunctioning thermocouple may lose the ability to sense heat from the pilot light, causing it to close the gas valve at random. If your furnace doesn’t stay on, check the pilot light. If the pilot light won’t stay lit, a bad thermocouple could be to blame.

What to check when furnace is not working?

Furnace Not Working? The 5 Most Common Causes [2019]

  • Step #1: Check your Air Filter.
  • Step #2: Check Your Pilot Light.
  • Step #3: Check Your Thermostat.
  • Step #4: Check The Power.
  • Step #5: Check Your Gas Supply.

How often should a furnace kick on?

three to eight times per hour
On average, furnaces should kick on and turn off anywhere from three to eight times per hour. However, if your furnace turns on and off more frequently, don’t assume the furnace is short cycling just yet.

What to do if your Furnace isn’t working?

Increase the temperature by five degrees and check if it follows suit.

  • Check that it isn’t being affected by sunlight or other heat sources providing false information to the furnace.
  • Ensure the batteries are fresh.

    • Why would a furnace stop working?

    The other reason why a furnace may stop working is clogged filters. The presence of dirt and dust in the filters will hinder the smooth flow of air and this will lead to the heat exchanger overheating, and ultimately shutting off the entire unit.

    How do you fix a furnace?

    To fix the furnace that won’t start, turn off the power to the furnace-and turn off the gas. Remove the front panel and look for the ignitor/sensor. Refer to your user manual to locate the ignitor. It is usually located near where the flames shoot out of the burners.

    Why is my furnace not kicking on?

    There are many reasons why your furnace might not be kicking on. Some of the most common explanations include: Troubles with your thermostat. Your thermostat is responsible for telling your furnace when to turn on and off. So if your thermostat is not set or working properly,…

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