teafreak35 Posted October 12, 2010 Report Share Posted October 12, 2010 I have a 1996 hot springs Jetsetter. I got it used a few months ago and it worked fine initially. The only problem was that the water was really warm,but never really felt hot. About 3 weeks ago it sprang a leak in the equipment compartment so I unplugged it, drained it and ordered the parts to fix it (it sat dry for about 3 weeks). It's been about 4 days since I refilled it and the water temperature hasn't risen above 82 degrees. Here's what I know: It's not the heater, as I have worked around the heater relay in the control box and gotten the heater to work (actually puts out nice warm water). I don't believe it's the flow switch (there are audible clicks from the transformer in the control box when the flow switch is unplugged/plugged in and an I put an ohm meter on the flow switch...0 ohms when the circulation pump is NOT running, pegged out when it is running). I've taken out the thermistat board and the hi limit board and inspected them...there are no burnt places or even smudges anywhere (they look brand new). At this point, I'm thinking thermistors (I checked them with the ohm meter also...the thermistat thermistor read 5 ohms and the hi limit thermistor read 8.4 ohms with the water at 82 degrees). I'm at a loss here b/c I don't have a clue as to how I could test the hi limit board or the thermistat board to see if they're ok...any ideas? And, I don't want to buy thermistors and both boards if it's most likely just a couple of $20 thermistors...I need some feedback, please. Quote Link to comment Share on other sites More sharing options...
Kreg Posted October 13, 2010 Report Share Posted October 13, 2010 Pull out the filters, Cycle the power off/on, keep the filters out and see if it heats. You may just have dirty filters. Quote Link to comment Share on other sites More sharing options...
teafreak35 Posted October 13, 2010 Author Report Share Posted October 13, 2010 Pull out the filters, Cycle the power off/on, keep the filters out and see if it heats. You may just have dirty filters. Thanks, Kreg. Tried that and no difference. I'm almost positive it's a thermistor at this point. I downloaded a chart that shows the thermistor resistance vs water temp for my model and my thermistors are giving values at 82 degrees that they shouldn't be giving until around 102 degrees. I even took them out and placed them in ice water...put the ohm meter on them again and they were still reading somewhere in the 70 degree range. I've ordered a pair and I'll see if that fixes it. I'll post an update once they're installed. Quote Link to comment Share on other sites More sharing options...
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