Guys, I have to call shens with that link as all he does is shows how to solder a wire there and doesn't provide one shred of proof it actually works and no one else that posts verifies that it does...because I also tried to PWM a new 3.1 and 3.25 the same way without success.

http://www.xtremesystems.org/forums/...9&postcount=78
Quote Originally Posted by Martinm210 View Post
Interesting, new PWM board is even labeled "Laing DDC 3.1-PWM". I was on Laing's site the other day and notice they also can make D5 PWM controllable.

Looks like you just need a pump with this PCB. The "Spare" contact is the PWM control wire I presume..


Thanks for the link..

Buddy, what does you're PCB say? Is it 3.1PWM or is there also a 3.2??
IIRC, all new DDC's share the same PCB, it's what they program the chip with that determines what the pump is capable of.