How Does Flame Rectification Work On A Heating Season

Flame rectification is the process of changing an AC signal to a DC signal. During flame rectification, the ignition control will send an AC signal in the range of 90v to 120v, from the flame sense terminal. That signal is sent down the flame sensor wire and through the flame sensor, it is rectified using the flame as part of the circuit and allowing the signal to come in contact with ground. A good ground is very important in flame rectification.
In this video, the process of flame rectification is revealed on a unit heater.
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[@HVACKnowItAll]

I hope this helps!

[@melllvar4262]

That's great info.
Thanks👍

[@moondogdieselworks3883]

Very well explained I learned more in under three minutes than in a one hour long video

[@HVACKnowItAll]

Thank you sir!

[@Earth_to_Kensho...ComeInKensho]

You broke it down in the right order. Perfect explanation. You get right to the point. Way to go.

[@HVACKnowItAll]

Thank you sir!

[@houptee]

Nice tutorial! I have had a lot of bad boards lately but it was other issues with the board not the flame output. I'm at the point where if I see the original board in a 10 year old furnace I just tell them it's best to replace it since they have upgraded boards part number and the board is obsolete anyway.

[@anothaparson]

Excellent explanation with each step by step easy to understand and extremely helpful to a junior tech aspiring to learn this wonderful trade. Nice boots! Thank you

[@tinymanthebeast]

wow this is a really great 💯 video 📸👏.

[@jkbrown5496]

I came across a video "Christmas Candle Flame in an Electric Field" by Animated Science. He puts a candle between 2 high voltage plates showing the flame "blow" in the electric field with more to the negative due to the positive ions in the flame. The flame rod is doing similar with a lower voltage since it is physically in the flame. It's just causing the ions in the flame to move toward the ground. It rectifies because the burn has so much more surface area in contact with the flame than the flame rod.

[@briancarlisi2224]

Thank you. What boots are those?

[@HVACKnowItAll]

Helly Hansen

[@mtgwdefender]

Do all the heating systems work the same way?

[@HVACKnowItAll]

Pretty much if it's using a flame rod yes