Jim Ball

Do you think there is something I need to calibrate or reset after replacing the thermisters?

Thanks. The thermisters I just replaced (the one left by the previous owners) looked band new. There was no wear or tear on them, the wires were new and the threads were good too. What suggestions do you have as far as getting into the control box?

Thanks for the replies. I turn the heating knob down and back up and don't hear a click. My wife and I have been in the tub twice in the last few weeks and it has stayed consistent at 98 degrees. The evenings have been pretty cool. It got down in the 40 the other night when we were in it. It stayed at 98 the whole time (this is warm, but not a "hot tub"). With the temperature as cool as its has been, I think the heater must be working. Any other suggestions? How do test the voltage of the heater?

I just added a non-chlorine shock to my spa and let it mix for about 30 minutes. I tested my chlorine levels earlier and it was like 1 or less because I haven’t added any in 4 days. I would like to get in the tub tonight but don’t want to if the sanitation levels are too low. I have ozone too. Can I add chlorine now or do I have to wait 24 hours since I just used the shock? Should I get in tonight?

Hello. I just purchased a home that came with a 95-96 Hot Springs Sovereign I. The previous owners drained it before leaving since they hadn't sold the home yet and it was going to be vacant. I filled up the tub and noticed a leak coming from a cracked Thermistor in the Cartridge Heater. Fortunately the previous owners left some chemicals and two new Thermistors. I drained the tub and replaced the them. I filled the tub back up, adjusted the chemicals per the instruction manual, and turned up the heat. Everything seems to be working fine; however, I have the heat knob turned to the highest setting (its not digital and does not have a thermostat on it - its just a turn dial from 1-9) but the temperature (according to the floating thermometer) will not exceed 98 degrees. The tub has been on for about 3 weeks and the daily temperatures are around 80-90 and nights are in the 60's. Does anyone have any ideas why its not heating above 98? Is there a switch or something inside I have to adjust? Thanks! Here is what the heater looks like: http://www.backyardplus.com/images/no-faul...r-1995-1996.jpg Here is what the tub looks like: https://www.oregonhottub.com/store/images/IMG_0724%5B1%5D