Hey all, maybe I'm missing something stupid here.
I am looking at a Goodman furnace that has run fine for 2 years (my own home) and has recently started acting up. On a call for heat, the id motor will turn on for a few seconds, and then turn off. After watching it, I am seing that the control board is actually powering down. A few seconds later, the board comes back up, and the cycle repeats.
I have verified voltage, polarity, and amperage to the unit.
I have bypassed the t-stat
I have bypassed every limit individually to make sure I didnt have some kind of shorting or any other oddities there
I have seen the id motor run fine when I pull a limit and the unit goes into its "purge" mode
I have double checked all grounding
I have pulled an entirely different power source
I have configured the unit to run in both single and two stage (in case the problem was in the algorhythm)
and last but not least;
I have replaced the board only to have the problem re-apear a week later.
Now I tend to be a guy who overcomplicates things from time to time, so please tell me I'm missing something simple!