temp displaying higher temp than water feels. was on 104, felt like 80. shut off brkr 4 10 mins, seemed ok. ck about 10 hrs later, says 112/oh. shut off brkr 4 10 hours.turn brkr on, temp shows 93. set to 102. 8 hrs later, 117/oh. shut off brkr. 10 mins, 100 degrees. ck w/thermometer, says 102. ck lite, pumps, seem good. reset temp to 102. rmvd filter, jets run better on heat mode. ck 1 hour later, good. 12 hours later ck agian. get - - - code. turn off brkr. rpld fltr w/fresh one. 8 hours later turn on brkr. diplay says 97. ck w/thermometer, says 100 . ck 1 hour later display says 100. whats wrong? all help apperciated.