Ok before I explain let me first thank all of you for sticking with me on this. As a group we covered nearly every aspect of a DVC500 and we probably know it better then some of the dealers out there. A special thanks to 009to090, Coalnewbie and McGiever for your public support and private messages on this subject and Big Jam for a great second set of eyes.... Recap:
Oct 26 I post that on first light the things not burning right and I explain what Im finding. I went thru a alot of guess work, spent tons of unnecessary money and wasted loads of time. That problem was either one of the probes or either the combustion or draft motors as after I replaced all of that, the fire lit perfectly but then I got the dreaded 2 blink code and Ive been fighting that one for weeks.
During the battle to overcome the original problem I bought a control board. That board only worked with a new pressure switch, combined $650 bill. When I got the 2 blink code, I decided to go ahead and get the new pressure switch with the board. The code indicates a loss of negative pressure in the firebox and everyone including the dealer that befriended me in PA suggested the same.fast forward to last week:
I get the switch, put it plus new board back in and no luck. Still the 2 blink code.
I get into it with Harman tech whose being very logical about this but I am adamant when I state I have checked every gasket, every cover, door and the pressure hose and filter. He's going to get me a regional manager
Friday, 009to090 suggest I look back into the flue pipe gaskets, they are not symmetrical and could be in wrong. I argue it but Ok, could be Interesting.Yesterday:
I get my friend on the block (hand fire coal guy and member here; Big Jam) to come down and put another pair of eyes on this. Hand fire guy is aching to find a reason to make fun of me so here we go. We take the unit off the flue pipe and sure as s#*% the gasket is in wrong. I take the 45degree elbow out and the 2nd gasket is wrong. An improperly installed gasket might restrict the intake slightly, I cant see this as being the culprit. The gasket still seperates intake and exhaust in either position. While Im scratching my balding head over that I am retracing all of the work I have done for Big Jam to comment on. I have the doghouse off the stove, pulling on wires and tubes when suddenly the problem reveals itself !Apparently, after installing the new motors and probes many weeks ago, checking all wires and tubes and reassembling, i failed to notice the pressure tube was PINCHED closed as it passed thru the back wall of the stove with all the wires !!! Thus I have had the 2 blink code since putting in the motors. SO EMBARRASSING.
Reassembled it all with the tube freed up; new switch and board and it works perfectly. Ran it all day Saturday.
Decided I never needed the board or switch so this morning (24F outside, 75F in) I shut down, put back in the original board and original pressure switch, its been running all day now! Confirmed. The dealer said they'd take back what I didn't need so that's my final act and Im done! I did also replace the front door glass and now once and for all, heating harmony has been restored!
Thank you to the forum and all members here. Without a reliable dealer and without knowledgeable service resources in my area, I needed this team to get me going again and you did it.
HAPPY HOLIDAYS TO EVERYONE !