Originally Posted by davidgsmit
Was wondering about that... Any idea which one i would need? My electrical knowledge could be better...
Funny thing is that both relays have the problem. Almost wonder if they're some how not getting enough electricity from th circuit board.
Originally Posted by cosmatics
I'm with you davidgsmit, the relays on my stc-1000 never turn off. I'll try smacking them and see if that helps. It appears to turn them on correctly, but when it switches cold/hot both the old side stays on. Pretty annoying, and I hope I just got one of the bad ones. So now I'm just manually unplugging this stupid thing on/off.
So far, there hasn't been a single confirmed malfunctioning STC-1000 reported in this thread, that I know of. Yours would be the first. Although, one place I ordered from, NovaPCS I think, canceled shipment of a batch of these citing unspecified quality control issues. Maybe yours are part of this batch. Opening up the case and checking that the transformer is the correct voltage, and the relays are the same as most might narrow down the issue.
Also, checking basic functionality by rewiring the controller on the benchtop in a very minimalist fashion, i.e. without neon/LED lights, extra switches, fan relays, disco balls, fog machines, lava lamps, etc.; might be worth it to double check that it is truly malfunctioning. Sometimes a single strand of stray wire in the wrong place can result in some very bizarre behavior. The terminal mechanism is a bit counter-intuitive, so make sure the wires are inserted and clamped correctly.