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Why does my furnace flame keep going out?

Elyse Schaden ∙

Lvl 10

∙ 1mo ago

Updated: 2/20/2025

There are several possible reasons why your furnace flame keeps going out. It could be due to a dirty or faulty burner, a clogged air filter, a malfunctioning thermostat, or a problem with the gas supply. It is important to have a professional HVAC technician inspect and repair your furnace to determine the exact cause of the issue.

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Related Questions

Why does my furnace pilot light keep going out?

There are a couple common reasons for a pilot light going out. 1. The thermocouple is weak. This is the gold rod that must see the flame in order to keep the gas valve open. it is a safety device that will not let the gas vavle open if there is no pilot. 2. The pilot is dirty and has a yellow flame. If this is the case, it will have to be cleaned. There are books on he market such as forced hot air furnace - troubleshooting and repair that show you how to repair your furnace. You can buy this at amazon.com

Where is the flame sensor located on my furnace?

The flame sensor on your furnace is typically located near the burner assembly, close to where the flame ignites. It is a small metal rod that detects the presence of a flame and signals the furnace to continue operating.

Where is the flame sensor located on a furnace?

The flame sensor on a furnace is typically located near the burner assembly, usually positioned in the path of the flame.

What does a Flame sensor in a hot surface ignition furnace do?

It tells the furnace that it lit... Hence the name Flame Sensor.

How big is a flame on a natural gas furnace?

The size of the flame on a natural gas furnace can vary depending on the make and model of the furnace. However, a typical flame size for a natural gas furnace is about 2-3 inches in height. It is important for the flame to be a consistent size and color to ensure safe and efficient operation of the furnace.

Furnace pilot light keeps going out?

There are several reasons why a pilot light could be going on. One reason is there could be a light breeze that is extinguishing the flame.

Seguence of operation for a direct ignition gas furnace?

If the furnace is direct ignition, The HSI or spark ignites the flame. A flame sensor passes current through the flame, if current is present the main.

What do you need to start a flame?

You simply need an ignition source (something to spark the flame) and a fuel (something to keep the flame going).

Why does my furnace pilot light keep going out?

Your furnace pilot light may keep going out due to issues such as a dirty pilot light, a faulty thermocouple, a draft in the area, or a problem with the gas supply. It is important to have a professional inspect and repair the furnace to ensure safe and efficient operation.

What is wrong if a Ruud furnace has cold air coming out of the furnace filter area?

Is there a flame in the furnace. Precisely where is this air coming from and how strong is it?

What does a yellow flame indicate on a gas furnace?

its hot!

What are the common symptoms and troubleshooting steps for a furnace issue related to a bad flame sensor?

Common symptoms of a furnace issue related to a bad flame sensor include the furnace not staying on, frequent cycling on and off, or the furnace not producing heat. Troubleshooting steps for this issue include cleaning the flame sensor with steel wool, checking the sensor's alignment, and ensuring the sensor is securely connected to the furnace.

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