hot tub turns off automatically – rewire/workaround?
I’ve got a computer controlled hot tub, cal-spa model 2100.
Its jets have three settings, high, low, and off.
On low there’s little jetting, mostly its there for circulation.
On high, its the full hot tub massage relaxing bubbling experience.
So ever since I got this thing, when I turn it on high, after about 1/2hr it turns itself down to low. I have to get up and turn it back to high. Its computer controlled by a relay box marked ‘whisper power unit’. I want to modify things so it will stay on high until I turn it off. Any suggestions on rewiring the circuit board or reprogramming the computer?
Also, to the people who are about to say ‘its designed to do that, don’t modify it!’, ‘it’ll burn out the motor, don’t do it!’, and other silly comments, please keep it to yourself, you’re wrong.
You can go on CalSpa’s website and get the manual for your unit to see if they’ve got a detailed schematic in there. Unfortunately, they don’t give a lot of detail on what’s going on inside of the electronics box.
I’ve got an older (1990′s) CalSpas unit with a bad relay in it. I can’t find a good schematic of mine anywhere.
The timing for this is a safety feature dictated by UL (I think its UL 875. Spending more than 30 minutes in a hot tub has been shown to be a leading cause of death. See my post at Saunascape about the background for this.) Typically, anything that is dictated by UL has to be hard to defeat, meaning if you try to open the electronics box, the board could destroy itself.
Since it’s a UL spec, you’re not going to be able to get another US-made residential spa controller that will let you keep this on for more than 30 minutes. You might be able to find a commercial one that has a set of contacts for an external timer that you could replace with a switch.
Spa jet, koroldiffusion
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