WinnipegJets204

Look into Coast and Master Spas. They're built like tanks. Many layers of fiberglass, all wooden supports. Clamped joints on all hose ends. Those two are my top two. They spare no expenses in construction.

After some digging, I found this. Apparently the switch at A10 position will disable the heater whenever a pump is being used on high speed (which is basically the entire time you're in the tub.) It's called "low amperage mode" Now I'm just wondering if it's safe to flip that switch or if I might fry my spa pack in doing so.

Yeah I confirmed today that the heater does in fact shut off when both pumps are running. I filled the tub with 36 degree water and the tub went into ice protection mode and ran both pumps continually. This made the heater stay off and the water did not heat after an hour of running. I had to dump water out and fill with my house hot water tank until my water temp was above 45. Then ice protection mode turned off and it started heating the water with the one pump on low. Now it's raising temp at about 4 or 5 degrees an hour. I am hoping a service tech can do something to make te heater able to turn on when the pumps are on because this is BS

I'm actually having the same issue, after half an hour or more my temp begins dropping from 104 at a rate of about a degree every half hour or so and it's really annoying. I got my electrician to come over and he did an amp test on the power wire going out to the tub and with both pumps running and the heater on, i'm only drawing like 26 amps @ 230v. I am starting to wonder if the heater was set up for 110v or if my tub switches the heater off when both pumps are running. Anyone in here have any insight on this?