Come today with new thermostat from factory .. and call technical support spend 15 minutes on the phone .. i follow his instructions we found out everything is fine. Wiring is correct . And element are good /thermostat. Power coming is 208v. Element reads 19A top and Botton. Nothing is wrong. I left the setting to 137 degree temperature... IF CUSTUMER CALL AGAIN . PLS SEND SENIOR TECHNICIAN.