Alex, In minute 13:40, you are talking about microamps... You said : "a microamps is one billion of an amp". A microamp is ONE MILLIONTH of an amp! A microamp IS a microamp! Good video! Thnaks!
Hi Alex, you made a mistake, voltage is measured in parallel or acress a device, current is always measured in series because it is measureing the flow of electrons. In order to get a correct measurement, you need to remove the connector off the probe and connect the meter on the microamp scale between the probe and the connector. When you connected the meter in parallel to the probe and ground, you are actually dividing the current between the control board and the probe, so in effect, you are not measuring the current that is going through the probe but instead the current delivered by the control board. If the probe is dirty, the way you did it will make it appeared cleaned and working because you see the microamp reading. Troubleshooting will be much more difficult because someone following your steps would be of the opinion the probe is working. This did not become apparant to you only because you always cleaned your probe as a first step.
Hello there. You are so right! IN minute 7 52 I meant to read voltage in parallel . One lead was on the female connector and the other should have been on to ground. Not on the sensor as I did. Since the sensor is just a rod and it was cleaned and it was screwed to the metal of the furnace and it was grounded . It gave me the measures I was looking for. even though it did it wrong. Thank you so much for catching that.!!!! Im going to make a correction on the description of the video
Great video, I was just wondering what happens to the negative sine wave of the AC current after flame rectification turns AC current into pulsating DC current. I understand only the positive sine wave is allowed to pass through the flame but what happens to the negative sine wave? Thanks
Hello, in a regular AC you have the hot and the neutral wires. The current goes from positive to negative 60 times in a second. (sine wave) In this case in the furnace is just one path. It doesn't return to through a neutral. It dies at the control. That is my take. Im not an expert. Does it make sense?
Hello Jessica, thanks for your question. The flame sensor would turn the unit off if the flame is missing or something wrong with the flame. That is a safety. Please expand on the problem you have . Be specific. Thanks
@@alexthehandyman3494 the problem is that the the fan turns on then the flame turns on for a couple seconds then it turns off then back on I wanted to know if it's dangerous to let it run that way
So obviously there is something wrong with the furnace . The flame sensor is doing what is suppose to do . Please have a professional fix the furnace. Better yet, why don't you clean the flame sensor is super easy. The problem might be something else but at least try. I might get you through the night but fix it soon.
@@alexthehandyman3494 song My question is do you recommend me to leave the furnace unit off until it's fixed buy a professional I don't have no one that can do that for me the only option I have is to call a professional to come and clean it out but thank you so much I really appreciate for that information I will follow you
