Examined Booster Heater unit. traced issue to booster heater not heating. relay board bad. not powering contactors and shows sign of corrosion. will order and return. customer is currently using low temp chemicals. 11/26/19 located breaker which is shared with disposal. removed and replaced temp controller. programmed and tested. ran dishwasher to cycle unit. rinse at 190 on dishwasher. good to go