pilot light on furnace won t stay lit

faustino-cacace-batteiger July 04, 2022 furnace , light , wallpaper , won Comment

If this tube is clogged or dirty there wont be enough gas flow to keep the flame strong. A furnace pilot light wont stay lit after the thermocouple because the pilot burner is unclean or the gas valve is not activating.

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If its installed in an enclosed area without adequate airflow there may.

. There are a couple of other things it might be. These are the reasons a furnace pilot light wont stay lit after the thermocouple has been replaced. The furnace may be clogged if the unit doesnt kick on even when the pilot light is ON.

Before conceding the cost of emergency repairs and calling an HVAC professional read ahead for some of the most common reasons why your furnace pilot. Therefore a clogged filter means not much air will go through. When your pilot light is on take a look at the flame.

A good furnace pilot light will ensure the safe and comfortable functioning of your furnace. The most common reason why your furnace pilot light wont stay lit is dirty furnace parts. A pilot light that wont stay lit can be a constant source of frustration so read on to learn why this might be happening to your furnace.

In This HVAC Training Video I Show UP CLOSE How the Thermocouple Pilot Light and Gas Valve Work on a Water Heater Furnace Fireplace as well as other Ap. All the air that eventually ends in your rooms as warmth goes through your filter first. It senses heat from the pilot light flame closing the valve if the light goes out to avoid a disaster.

But if the furnace pilot wont stay lit and you can determine a cause within the furnace a draft might be the cause. The most likely reason why your furnace pilot light wont stay lit after replacing the thermocouple is that you diagnosed the wrong problem. A dirty sensor could be the reason why your furnace wont stay on or even why your furnace wont stop blowing cold air.

Attempts to re-light the pilot light are futile. You likely thought you had a bad thermocouple when indeed the issue lay somewhere else such as in the gas valve or pilot orifice. Its located within the pilot light assembly.

If your furnace has a pilot light it wont work if the light continues to burn. Maybe the pilot stays on for a moment and the furnace attempts to fire but almost immediately shuts down. You need to first make sure you turn the valve to the OFF position and wait at least 3 minutes before going on to the next step.

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. Then light the pilot flame and wait for a few seconds until the thermocouple heats up. If the thermocouple gets dirty it could block the sensor.

This component is a heat sensor that regulates the gas valve that runs to the pilot light. It wont stay on. If the pilot light wont stay lit on furnace the system may have been installed in a poor location.

You can clean your thermocouple using an emery cloth or steel wool on the sensor tip to get rid of corrosion. See the working mechanism of this unit is the following. Alternatively the thermocouple was bad too.

If your pilot light is lit but the burners wont ignite you might need to check the ignition sensor. In order for a furnace to work effectively it needs oxygen to breathe. The thermocouple operates by closing the gas when the pilot light goes out.

Once your pilot light goes out you will have to open your furnace and relight it manually. Once you release the button now if the pilot light still doesnt persist to stay lit- then its perhaps time for a general furnace check-up. Turn the valve to the PILOT setting and hold a lighted match right next.

The thermocouple is a part of this procedure. Why does this happen. It takes just a minor filter issue for the furnace to stop operating.

A dirty pilot burner and orifice prevent the pilot light from burning. The clue to this cause is that the pilot light lights easily after being out and stays lit for a few hours to a day or more. The thermocouple is often the culprit if your pilot light doesnt stay lit.

Find the gas valve that has the onoff and pilot setting printed on it. This occurs because the thermocouple doesnt hold the magnet open allowing for the gas valve to work. If the flame isnt strong enough the thermocouple wont sense it and may shut off the supply of gas to the flame.

Replacing the thermocouple may only have a little to do with this issue.

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