The Furnace Flame Sensor: What Does it Do?

What Does the Furnace Flame Sensor Do?

What does the furnace flame sensor do? – this is a question we get often. The furnace flame sensor is a crucial safety component in any gas furnace. Its job is to detect whether or not there is a flame present in the combustion chamber and to shut off the gas supply if it senses that the flame has gone out. It prevents the risk of a dangerous build-up of gas in the furnace. The sensor is usually located near the burners and consists of a small probe extending into the combustion chamber. When the furnace usually operates, the probe should sense heat from the flames and allow gas to flow into the chamber. However, if the flames go out, the sensor will detect a temperature drop and shut off the gas supply. This simple system is vital for ensuring the safe operation of any gas furnace.

Do all gas furnaces have a flame sensor?

It would be best to have a flame sensor to heat your home with a gas furnace. It is a safety measure to ensure that the furnace only ignites when a flame is present and not when there is a gas build-up. If the sensor is not working correctly, it can cause the furnace to overheat and become a fire hazard. Most gas furnaces will have a flame sensor, but some models do not. Before purchasing a new furnace, be sure to check whether or not it has a flame sensor. It will help you avoid any potential safety hazards in your home.

How much does it cost to replace a furnace flame sensor?

A furnace flame sensor is an important safety component in a gas furnace. The sensor monitors the flame in the furnace and signals the gas valve to shut off if the flame goes out. Unfortunately, a flame sensor can fail due to age, corrosion, or dirt build-up; when this happens, it will need to be replaced. Replacing a furnace flame sensor is a relatively simple repair that a qualified HVAC technician can do. The replacement will depend on the make and model of the furnace, but it is typically a few hundred dollars. Therefore, it is vital to be aware of the signs that a flame sensor needs to be replaced so that you can budget for the repair before it becomes an emergency.

How do you reset a flame sensor?

A flame sensor is essential in a gas furnace, as it ensures that the flame is always burning. If the flame sensor is not working correctly, the furnace will not be able to ignite the gas and may cause a safety hazard. If your furnace is not igniting correctly, you may need to reset the flame sensor. To do this, turn off the power to the furnace and remove the flame sensor from its mounting bracket. Next, use a wire brush to clean debris or dust from the sensor. Once the sensor is clean, you can reattach it to the mounting bracket and turn the power to the furnace. The reset process may vary depending on your furnace model, so consult your owner’s manual for specific instructions. By following these simple steps, you can ensure that your furnace runs safely and efficiently.

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