i have a 2005 down east spa by master spa. it is overheating the water. we set the temp on 80 and the mode on sleep and it got to 107. we had the thermostats checked and both read ok. we removed the cabinet insulation and the filters to see if that was the problem. after cooling down overnight, i turned power back on and set to 95 on economy mode and in two days was 103. we bought the unit new and it performed perfect until this year. any suggestions appricated. thanks in advance.