How To Clean A Lennox Furnace Flame Sensor
There's no doubt most it: furnaces are one of the most important appliances in our homes. They help go along us warm in the winter. Furnaces are made upwardly of a variety of parts and components that are engineered to ignite natural gas to create warm air. Although the heat exchanger and gas burners in your furnace are disquisitional to produce heat energy, the nearly important office in a furnace is the flame sensor. If you are encountering issues with your furnace, this is a sign of a dirty flame sensor. To assist you restore the operation of your furnace on a cold mean solar day, we have compiled a list of steps to follow when y'all are cleaning your flame sensor.
How to Sanitize a Furnace Flame Sensor
Knowing how to clean the flame sensor is an of import office of keeping your furnace functioning properly in the winter flavour. If you don't make clean the flame sensor once a year, the furnace in your home tin can fail on a cold day or night. To prevent the negative consequences of becoming trapped in a blizzard, follow these steps to remove and sanitize your flame sensor.
one.) Conciliate the Furnace
Before yous offset to clean the furnace flame sensor, make certain that the ability is off. Audit the surface area near your furnace to detect the ability switch. The switch will resemble a miniature toggle on your furnace. If you tin can't find it, shut the furnace downwardly from the circuit-breaker box in your garage. Next, brand sure to shut off the gas to the furnace prior to cleaning the flame sensor. For your condom, it is important that you both plow off the furnace and shut off the gas. Recollect: turning off the thermostat does non deactivate the power to the furnace.
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2.) Detach the Flame Sensor
Prior to cleaning the flame sensor, you will need to remove the screws to disassemble the sensor from the furnace. Once the screws are removed, the flame sensor will slide out of the furnace. To properly remove it, unscrew the ¼" hex caput screw it is mounted by. Remove it with care. Depending on the furnace yous accept, you might need to detach a wire from the flame sensor.
iii.) Sanitize the Flame Sensor
To clean the flame sensor, gently rub the metallic rod with light grit sandpaper. Exercise not apply sandpaper on any other component in your furnace. This is to become rid of the buildup on the sensor. Next, accept a paper towel to remove excess clay from the flame sensor.
iv.) Replace and Reconnect the Sensor
Later on you lot have cleaned the flame sensor, reconnect the wire if you lot took it off and reconnect the flame sensor on the burner associates with the ¼" spiral. Screw information technology back in and put the doors back on. Once everything is deeply attached, plough the furnace back on.
five.) Exam the Furnace
When you plough the furnace dorsum on, it might take a couple of seconds to first the heating cycle. The fan may actuate and operate for a couple of seconds before the natural gas is ignited. It is normal for the furnace to operate for a small corporeality of time earlier the gas is ignited in the burners. The delay is caused by a series of tests that are existence performed by the furnace to ostend everything is working properly. When the furnace is assembled and the flame sensor is clean, the heating system should operate ordinarily.
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How a Flame Sensor Operates
The furnace'southward flame sensor is a modest metal rod with a base that conducts an electrical current. When the gas valve opens at the beginning of the heating procedure, an electrical current is distributed to the flame sensor to detect whether or non a flame is present. The airplane pilot light or electric igniter in a furnace is designed to produce a miniature flame that is used to ignite incoming natural gas before it arrives at the heat exchanger.
Once the flame sensor detects a flame, the natural gas volition be circulated to the gas burners and estrus exchanger. If the flame sensor needs to exist cleaned and cannot detect a flame within 10 seconds of operation, it will disburse an electric betoken to turn the furnace off to prevent a toxic gas leak. This cycle repeats a couple of times.
Depending on the model of your furnace, the flame sensor will perform a total of two tests to detect and monitor the flame. If the flame sensor cannot sense the flame at the end of the second test, the furnace may be permanently shut downwardly and you will exist required to clean the flame sensor to restore the organisation.
Why It's Important to Clean Your Furnace Flame Sensor
Exercise you hear your furnace starting and shutting off every v minutes? Does this happen a diverseness of times, and you lot all the same receive no estrus in your home? The likely culprit is a dirty furnace flame sensor that needs to be cleaned by a certified technician. When the furnace doesn't plow on, many homeowners might look to professionals to assess the state of affairs and remedy it. However, cleaning your flame sensor before calling a licensed technician could save you money in the long run. In some cases, cleaning your flame sensor is what gets your furnace up and running again.
Differences Betwixt Bi-Metallic Strip and Optical Reader Flame Sensors
Bi-Metallic Strip Flame Sensors
At that place are two master types of flame sensors: a bi-metallic strip and an optical reader. Bi-metallic strip flame sensors generate a modest amount of voltage when information technology comes into contact with heat. The greater the heat, the higher the voltage. Of the 2 types of flame sensors, bi-metal strip flame sensors are mutual because they are inexpensive, piece of cake to make clean, and highly accurate.
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Optical Reader Flame Sensors
Optical readers are used for large industrial furnaces and boilers. An optical reader flame sensor features a college voltage in comparison to bi-metallic strip sensors. They utilize a photocell that will generate a voltage from the light source. The brighter the light, the larger the voltage. Optical reader flame sensors are especially sensitive to grit or debris, which means they need to get cleaned ofttimes to remain constructive. Although optical reader and bi-metal strip flame sensors produce a voltage in the presence of a flame, an optical reader is utilized in industrial applications while a bi-metallic sensor is used in homes.
Heating & Furnace Repair Services
Keep your heating system in tip-top condition with our innovative heating repair services. Our experienced professionals will help you clean your flame sensor and offer dependable furnace repair or furnace tune-up services to homes in New Bailiwick of jersey. In addition, our team of certified technicians offers furnace installation and replacement services. Choosing to delay a furnace maintenance service tin can put your family unit at chance of dealing with the negative consequences of a gas leak or dangerous temperatures. Requite our staff a call by phone at (732) 201-3305 to create an emergency heating appointment for your furnace.
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Source: https://teamelectricinc.com/how-to-clean-a-furnace-flame-sensor-5-steps-tips/
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