Pilot Light Issues: How to Fix, Test, and Stay Safe

If your furnace, water heater, or stove won't stay on, the pilot light is often the culprit. A weak or out‑of‑flame pilot can leave you cold, cause strange smells, or even shut off your whole system. The good news is you don't always need a pro – many pilot light problems are easy fixes you can do yourself.

Common Reasons a Pilot Light Won’t Stay Lit

First, figure out why it went out. The most frequent causes are a dirty tip, a clogged gas line, or a faulty thermocouple. Dust and debris build up on the pilot tip and block the flame. A gas supply that’s partially closed will give the flame just enough fuel to sputter, not stay steady. The thermocouple is a safety sensor; if it’s dirty or worn out it won’t sense the heat and will shut the gas off.

Another sneaky cause is a draft. If a window or vent is blowing directly onto the pilot, the flame can be blown out repeatedly. Check for any new openings or fans that might be creating a breeze near the appliance.

Step‑by‑Step Guide to Relighting Your Pilot Light

Before you start, turn off the gas supply and let the area cool for a few minutes. Grab a flashlight, a thin screwdriver, and a long match or lighter. Open the access panel – most furnaces and water heaters have a small door you can pop off.

Locate the pilot assembly. You’ll see a small knob marked “Pilot” or “Ignition.” Turn the knob to the “Off" position, wait 30 seconds, then turn it to “Pilot". Hold the knob down while you press the igniter button or use the match to light the tip. Keep the knob pressed for about 30 seconds after the flame catches – this lets the thermocouple heat up and signal the gas valve that it’s safe.

Once the pilot stays lit, turn the knob back to “On" and replace the access panel. Run the appliance for a few minutes to make sure the flame stays steady. If it goes out again, repeat the cleaning steps or call a professional – a bad thermocouple or deeper gas issue needs expert attention.

Regular maintenance helps avoid future hiccups. Wipe the pilot tip with fine sandpaper or a soft brush every year, check for loose gas lines, and keep the surrounding area free of dust. A quick visual check each spring can save you a chilly night later.

Having a pilot light that works reliably keeps your home warm and your bills low. If you ever feel unsure, or if you smell gas, shut off the supply immediately and call a qualified technician. Safety always comes first.

At Wells Appliance Repairs, we’re ready to handle stubborn pilot light problems, thermocouple replacements, and any gas‑related repairs. Give us a call, and we’ll get your heating back on fast.