Robert, Yep, same as you think!!!!! I'm an Electronic Tech and yes all my meters works very well. They are on the mark down to the microvolt. I've had 4 years of elecronics plus 24 years of servicing analog electronics, however, this dumb ass thing sucks to high heaven! I've given up on the piece of...

Robert, Thanks for your help. Man, I do appreciate your time and knowledge. Your great. Now, I've got to admit that if I ever get within reach of the dumb ass person that designed this thing i swear I'll make him so mad he'll attack me so I can WHIP HIS ASS or shoot him which ever it caals for...! I...

Robert, Thanks for the discirption. I do understand and we are on the same path. Yep, my problem is the return to xformer. As i said, I've determend the half of the circuit from one side of x-former through the t-stat and on to the sequencer is good. The return trip back to x-former is reading about...

Robert, I traced out the control circuit for the sequencer. The w-terminal/white return wire from the t-stat has continuity from the screaw terminal to the sequencer. I then traced the other leg from the sequncer (bottom lug / light blue wire). I found it does not return to the xformer but travles t...

Robert, thanks so much for your help. I did the checks. I do have 120vac at both ends of both elements. and both limit switches and elements are good. I do NOT have 24vac across the control circuit of the equencer. I have verified that the xformer is good. I checked all four t-stat wires with an ohm...

Robert, Thanks so much...!! I see what your getting at here. Duh, I should have never assumed that just because the wires looked good that their continuity would be the same under load. I'll check for voltage as you suggeted either tomorrow or Saturday. After your adivce I'm thinking I'll find a bad...

Gentelmen, Great forum. I'm having a problem as someone else had posted however, i did not want to highjack his thread. I've got a coleman presidential M# 3500a812. The A/C is working fine but heat will not come on when dammaned. It may sit for 30 minutes before coming on. I've replaced the sequence...