I know this thread is old, but maybe this will help someone. I just lost 6 hours because I was I was a dumb ass. I've had the controller and pump and have used it successfully for many batches over the past 4 years at least. I just got the upgrade kit (with heating pad and new controller) and the cooling pump would not kick on. Took the pump apart and did find crud but did not solve the issue. After more more troubleshooting with volt tester, etc. decided the pump must be bad so pulled out a DC aquarium pump I had laying around, cut and spliced cords so I could connect to the controller, but still no joy. Gave up and separately rigged up another pump with a timer just to have a way to cool, and decided I'd have to order a new pump. After a couple hours (and a couple beers) and running across this thread, I remembered that, yes, there is a programmed delay. So I just now re-spliced and attached the pump, set the delay to 0 and, what do you know, now it's working. Totally had forgotten about the delay setting. So, hopefully no one else will go to such extremes over something simple, but easy to overlook. BTW, I find by setting the delay (the PT setting) to 10 works much better and avoids the over chilling I was getting before. Will see how it works now with the dual temp control.