Good video! I have a few Lennox units like that with those double stack control boards, it seems like they run for along time but once you start having issues they suck to repair
Depending on the job, typically I use a small wire wheel to clean off the burners good and make sure the ground is also good when cleaning sensors. Dirty burners cause fluctuations in the readings. If it’s 20f below and I’m swamped I’m cleaning the sensor and probing for CO and checking the filter and making sure the T-stat works For on and off.
I have the same meter. I do use the application from time to time. I ll use the app to get my amp-draw with blower door on. The one thing I hate is no Mv reading.
For checking micro amps and you don’t have alligator clips. Use a jumper cable in place of alligator clips so you’re not holding your lead to the flame sensor the whole time
You can buy the Fluke accessory kit its called the TPAK which has a magnet and some other options. There is a space at the top of the meter that it fits in.
