Thanks for all the input. Little more info. The converter actually has sticker labels someone put on it that was kind of confusing me as well. I pealed those of and got to the original labeling.
Here is what I have.
No DC output power from Pos to Neg.
~20.5v DC from Pos to Grnd.
I was trying to run the furnace when we heard crackling and it was the wall 110 outlet in the bathroom. Killed all power, removed the outlet & capped the AC wires with wire nuts. Turned on the power again and set for ~30 min. Nothing running, but all breakers on.
Then turned on the furnace & within 10 secs, heard the crackling again, this time it was the kitchen 110 outlet.
Killed all power and removed the converter because I notice I had no 12v working anywhere.
So, now that I know the DC converter has no output and the only time I had AC line problem was when I tried to fire up the furnace. I'm thinking the DC converter was doing something really weird & causing AC problems back through it's plug. I'm Thinking this because the furnace is only 12v and nothing else was plugged into AC anywhere.
With the converter out of the TT, the AC at the outlets is 111v and the outlets seem to be fine. Even plugged in a coffee pot to see if anything would wig. No change.
Thanks again for all the feedback.