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teafreak35

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  1. Thanks, Mark. In the 1500 series no fault heater, the heater housing has an inflow thermistor (goes to the thermistat) and an outflow thermistor (goes to the high limit board). I tried purging air...even took them out to make sure there wasn't a pocket. After testing them some more today...and downloading a thermistor "resistance vs. temperature" chart for my model, I'm pretty sure the inflow one is way bad. It's giving me a 5 ohm reading with a water temp of 82 degrees. It shouldn't be reading 5 ohms until the water temp gets around 102 degrees. I even took it out and put it in a glass of ice water. Cross referencing the chart, it was reading the ICE water to be 70 degrees. At this point, I'm thinking that the inflow thermistor is sending a false reading to the thermistat and not allowing it to cycle the heater on. I've ordered a new inflow and outflow thermistor and plan to try that. I'll post an update to let you know how it goes.
  2. 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.
  3. A quick question. I have a 1996 hotsprings Jetsetter spa with a 1500 series heater. I recently refilled it and may have plugged it in too soon. I heard air bubbles traveling through the circ pump and immediately turned it off. Now I'm getting really low readings from my thermistors. Could an air pocket that's trapped inside the heater cause my thermistors to give false readings and, if so, how do I get rid of the air pockets? I really need help here, please. Thanks.
  4. Don't know. He said there's no way of calibrating these new digital units - in the old days you could change a variable resistor, but now it's a self-contained computerized unit. I assume he knows his stuff, and he called the factory and spoke to a Hot Springs tech who could not offer anything more than dismissing the issue. I would request him come back. You be home and see for yourself what the resistance value is write it down. When he checks the temp of the water write that down post it here. There are many of us that can tell you if the thermistor value is correct compared to the water temp. Also let me know how he determines the water of your spa. I have to agree with the above poster here. He dont know his stuff. At 101 Degrees those thermistors should have a resistance value of 5.2 - 6k Ohms anything different they need to be replaced. Not trying to but in here, but I have a hotsprings spa with a high limit thermistor resistance of 8.4 ohms at 82 degrees. Is that normal?
  5. 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.
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