Test Furnace Flame Sensor
Test Furnace Flame Sensor. The combustion process has to begin once the gas valve opens. Most furnaces will go into a safety ignition lockout when a shutdown happens three times.
There should be a little panel that you’ll need to remove to gain access to the sensor. Putting a meter inline between the sensor and lead wire from the furnace control board allows you to read the dc. Here are the steps to test your flame sensor:
Simply Put, Its Job Is To Sense When There Is A Flame.
The flame sensor responds to changes in temperature. If for any reason you find it impossible or unsuitable for you to clean the flame sensor of the furnace, there is another option you can opt for. You need a multi meter that measures micro amps which you will connect in series with the flame sensor.
Unplug The Furnace Or Switch Off The Power At The Breaker.
Testing the flame sensor isn’t complicated, but you will need a light source and multimeter to do the job. • disconnect the flame sensor wire from sensor. If no flame is detected, the sensor will shut off the furnace to prevent unburned gas from escaping into the chimney or vent system.
How To Test A Furnace Flame Sensor.
This cycle will be attempted two more times, but if the gas valve. It facilitates the communication between the gas valve and furnace firing. They are part of the heating’s systems safety circuit and work alongside the control board to prevent gas poisoning and potential fires if the furnace is on without a fire.
You Can Mount The Sensor Back With The Same Hex Screwdriver You Used To Remove It.
Just see if the furnace sensor is ok at all. For those unfamiliar with the 'flame rectification' method of flame detection, the 'sensor' looks like this: Troubleshoot flame sensor • the flame sensor in any furnace proves combustion.
Ensure The Furnace Is Properly Grounded.
A furnace specialist will test the flame sensor and replace it if needed. To determine whether the flame sensor is sending a signal to the gas valve, you have to connect a multimeter than can measure microamps (µa) in series between the sensor terminal and the wire that leads to the gas valve. If the reading is below 5.0 microamps, you have a bad flame sensor.
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