Heat stops at 96 degrees. The control is set to the limit. The click that happens when I would turn down the knob was closer to the upper limit. Now when I move the knob down there is not a click. I think this means the tub is at the upper limit.

On another note - will the circ pump start feeling warm as the tub gets warm. There is still real strong flow, however I do not want to burn up that pump.

The circ pump runs very hot-don't worry about that.

The t-stat, however, sure sounds like it needs needs replacement.



There is a great upgraded T-stat that's available, includes and electronic T-stat, thermistor, and instructions. MUch better than the original T-stat.
part# 75087, around $65. If you can't find 'em anywhere, I have them in stock.

Good luck!

Thanks for all the help. I have fixed most of the problems with this spa. I would like to get that tstat from you. How would I go about contacting you to get it.

I mistakenly thought that you were working for the site hosting this forum. They spoke kindly of you, however said that you did not work for them and they had no idea of the part you are talking about.

Pump is running. Now with the wiring fixed (from other thread) - the heater is heating much faster. But, it still goes to 96 and stops with the tstat in the tube. If I take the tstat out of the tube the tub will rise above 100.

Thank you for all the help - I owned a new Hotspring spa at my previous house and I have been missing it for the last four years. I was given this one and it has been a project at best. Without this forum I think it would have been thrown away.

pm sent

Changed out the Tstat according to the directions and it still acts in the same manner. Only heats to 96 deg. - is it possible that the stop for the dial is in the wrong place?

When you replaced the T-stat, did you line up the knob when you put it back on?

Turn in all the way down (counter-clock-wise), and be sure the line on the panel points to "off" on the dial.

another suggestion...it might have a summer timer toggle switch on the side of the control box.

I do not have the dial back on the control box. I have been turning the inner dial to the end of the limit screw.

The mounting screws lined up perfectly and the lower limit hole was right on. The upper limit screw hole was slightly off. If I drilled it out, I do not know if the screw would hold. It looked like there would just be a wide hole. And it looked like the screw moving would place the limit screw closer to the off side of the dial.

I do not see a any switches (that may be summer switches) on the side of the box. Just the two high limit switches.

Should I take out the limit screw (upper) and attempt to turn the dial just past to see if the heat rises?

Unless it's way-off, it won't make a difference.

Are you hearing the heater relay click?

At what point?

It will click near the high limit until it reaches 96 deg - then it no longer clicks until the temp comes down a little. Once again if I pull the tstat from the tube it will go up in temp to an uncomfortable 110.