Its probably something really simple but without taking it apart myself its hard to say, They are a really simple design so this baffles me a little bit.
Did you buy this or build it? Something definately isnt right. I would start by taking it apart from the top "T" down, it looks like something is blocking the inlet tube.
Yeh.. The directions that came with are pretty vague.. At least for someone who has never used one. I got it goin fine now. The unit is a TS 13010. The wiring was easy and its working great.
I got mine all wired up but am a bit confused on the parameter programing, is the set point just one ideal temp or do you need to set a high and low? I hav'nt started trying yet, dont want to screw it up.