T2DB : Low Temperature B

  • Use a smaller mix chamber that is rated for the unit in use.  If recirculating, decrease flow or decrease temperature setpoint.


  • Swap A and B heater output cables and RTD cables and see if issue follows. If so, replace RTD.


  • Check for loose heater element wires or loose green connector at TCM.
  • Confirm resistance of heater. Heater resistance should be 23-26 Ω. If out of tolerance, replace heater element.