4 Reasons Why Your Furnace Pilot Light Won't Stay Lit

Furnace Pilot Light Keeps Going Out
The most common reasons the furnace pilot light won’t stay lit:

Bad Thermocouple
A furnace thermocouple is a safety feature that regulates gas flow to your system based on whether the pilot light is on.

In simple terms, the thermocouple checks to see if your pilot light flame is lit and turns off the gas flow if it senses that your pilot light is off, so you don’t have gas building up in your home.

However, if your thermocouple is damaged, dirty, or bent, it may inaccurately sense that your pilot light is off and turn off the flow of gas to your system. Without any gas supply, your pilot light won’t stay lit.

The Pilot Light Orifice
To keep the furnace pilot light lit, there needs to be a consistent supply of gas flowing to the flame through something called the pilot light orifice.

If this tube is clogged or dirty, there won’t be enough gas flow to keep the flame strong. If the flame isn’t strong enough, the thermocouple won’t sense it and may shut off the supply of gas to the flame.

You may issue the pilot light orifice if you notice that your pilot light flame is a weak yellow color rather than blue.

Damaged or Faulty Gas Valve
Simply put, the gas valve supplies your pilot light with gas. If your gas valve is set to OFF or is faulty in some way, a consistent supply of gas won’t be delivered to your pilot light, resulting in a flame that goes out.

Old Gas Regulator
If you’ve noticed that your other gas appliances’ pilot lights are struggling to stay lit, this is likely your issue.

A gas regulator decreases gas pressure before it makes its way into your home and to your appliances. As your gas regulator ages, it can struggle to supply your home with a strong, consistent supply of gas, which can result in a gas pressure that’s not strong enough to keep your furnace’s flame lit.

Need help fixing your furnace pilot light?

If you have one of the issues listed above, that requires the help of a professional, Pure Air Solutions, LLC is here to help. We offer furnace repair and maintenance to keep your furnace running all winter long.

Pure Air Solutions, LLC has been around in the industry for years. We have been trusted by hundreds of customers looking for a heater repair service.

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