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

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15y ago

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Does gas leak when the pilot light goes out on a heater?

No it shouldn't, There is a sensor that turns off the gas if the pilot flame goes out, The only way it would leak gas is if it as a faulty sensor, or a peice of depree gets in the gas line


What would you use a safety Bunsen burner flame for?

A safety Bunsen burner flame is used primarily in laboratory settings for safe heating and sterilization purposes. It provides a controlled, adjustable flame that minimizes the risk of accidental fires or burns. This type of flame is ideal for tasks such as sterilizing instruments, heating liquids, or conducting experiments that require consistent and stable heat. Additionally, the safety features often include mechanisms to prevent accidental ignition and ensure proper ventilation.


How does a furnace heat a house?

This is how a furnace heats your home. When the thermostat calls for heat, a signal is sent to the gas valve. If you have an older unit, the gas valve checks to see that the thermocouple sees the pilot and if it does, the gas valve opens to send gas to the burners. If you have a newer furnace, the thermostat sends a signal to start the pilit ignition sequence (either spark or hot plate) and then the flame rod sees the pilot (of the hot plate is up to temp.) the gas valve opens to send gas to the burner. The fan control will then send a signal to the blower to start up. As the temp rises in the room, the thermostat sends a signal back to the gas valve to close as it reaches the set point on the thermostat and the blower continues to run until the set point on the fan control is reached and it shuts off ending the cycle. If you would like futher in depth information, check out my book on Amazon called Forced hot air furnace - troubleshooting and repair.


What is a Bunsen burner and what is its function?

The bunsen burner is used to heat items for experiments using a controllable temperature flame and surface area at which the heat is applied to the vessel.


What are Two kinds of flame?

the yellow/safety flame - thats the one that burns less the blue flame - burns THE ROARING FLAME - that one burns a lot and you can tell the difference from the blue flame because it makes a roaring sound

Related Questions

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 is the function of a furnace ignition sensor and how does it contribute to the overall operation of a heating system?

The function of a furnace ignition sensor is to detect whether the pilot light or ignition flame is lit. It contributes to the overall operation of a heating system by ensuring that the furnace only releases gas when the flame is present, which helps prevent gas leaks and ensures safe and efficient heating.


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.


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.


What is the function of the ignition sensor in a furnace and how does it contribute to the overall operation of the heating system?

The ignition sensor in a furnace is responsible for detecting when the pilot light or main burner flame is lit. It ensures that the fuel is ignited properly, allowing the heating system to function efficiently and safely. If the ignition sensor fails, the furnace may not start or stay lit, leading to a lack of heat in the home.


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.


How does a flame sensor work in home furnaces by using a metal rod in the flame?

Its not a flamesensor its a pilot generater it generates a small amound of electricity to open the main valve that way if your pilot light goes out it wont let gas escape and couse a potentian explosion The above answer is not accurate unless you have a standing pilot model furnace. Then the "flame sensor is called a thermocouple, much different than the flame sensors used in Direct Spark Ignition, hot-surface and intermitant ignition furnaces. The flame sensor uses the flame of the main burner to prove flame at the circuit board by measuring conductivity to ground through the flame.


Furnace on and off few seconds after?

check your flame sensor


Why does my high efficiency furnace shut off after the initial ignition?

Your high efficiency furnace may shut off after the initial ignition due to issues such as a clogged air filter, a malfunctioning thermostat, or a problem with the flame sensor. It is important to have a professional technician inspect and repair the furnace to ensure it operates efficiently.


On a gas furnace what energizes the blower motor in heat mode?

flame sensor


What is the function of a gas furnace flame sensor and how does it contribute to the proper operation of the heating system?

The function of a gas furnace flame sensor is to detect the presence of a flame in the furnace. It contributes to the proper operation of the heating system by ensuring that the gas valve remains open only when a flame is present, preventing the release of unburned gas and ensuring safe and efficient heating.


Why is my furnace light blinking 4 times?

A furnace light blinking 4 times typically indicates an issue with the furnace's ignition system. This could be due to a faulty igniter, gas valve, or flame sensor. It is recommended to consult a professional HVAC technician to diagnose and fix the problem.