I tried to run the tub with the heater turned down. I reset the gfci and turned on the jets. ran for 10 minutes and then I pushed the cleaning cycle (10 min) and when the cleaning cycle was finished it tripped immediately. I had the recycling pump unplugged the whole time. After the cleaning cycle the recycling pump is the only thing that is suppose to run continusally, but it wasn't plugged in. Whenever I plug the circulating pump in the light just blinks and there is no pwer to even run the jets. Sounds like it is the recirculating pump for sure. There is a lot of calcium buildup on the recycling pump as well. thanks!