Set Temp And Actual Temp

[sdriv]

Just got my tub up and running(2 days) and so far it seems as if there is a 3 degree difference between my set temp and and the actual temp. For instance if I have it set on 98 degrees the reading on the display and the extra thermometer I have in there read 101 degrees. So I know the theremostat is correct (plus I just installed a new one as well as the hi-limit sensor) Do you all think this is kind of normal or could there be something else I should check into? By the way this was a used Sundance Optima from a family member that had it from new. Thanks

[Jake the dog man]

It seems to be so on most. Mine actually reads 5degrees lower then what water actually is. I know 3 other friends and all theirs are similar.

That being said, that does leave room for problems. Years back, when I was between tubs, my sisters fairly new tub, was set at 104 but it slowly got hotter & hotter. She hadn't been using it, but I was using it doing some rehab on my arm. I kept telling her the tub was getting too hot, but she kept saying the people said it would always run hotter then set. It wasn't until I took over a meat thermometer and it read 135degrees that she got them to come out and replace the heating unit. She also got a written guarantee just in case the extra heat might make the acrylic bubble.

[Cavalier]

It seems to be so on most. Mine actually reads 5degrees lower then what water actually is. I know 3 other friends and all theirs are similar.

That being said, that does leave room for problems. Years back, when I was between tubs, my sisters fairly new tub, was set at 104 but it slowly got hotter & hotter. She hadn't been using it, but I was using it doing some rehab on my arm. I kept telling her the tub was getting too hot, but she kept saying the people said it would always run hotter then set. It wasn't until I took over a meat thermometer and it read 135degrees that she got them to come out and replace the heating unit. She also got a written guarantee just in case the extra heat might make the acrylic bubble.

I agree there is almost always a few degrees difference between actual and set. It would be nice if the control circuit boards were fabricated with a trim pot so the thermisters could be trimmed to read accurately.

[Dnepr Dave]

My spa's temperature display shows two degrees warmer than actual temperature, its consistent at all temperatures too.

I haven't looked for an adjustment on the circuit board, there's no mention of an adjustment in the owner's manual.

Dave