Examined Kettle unit, customer states unit blew heat transfer fluid from the rear. Found unit cool and in vacuum. Removed control panel cover and inspected, no shorted wires or stuck contactors. Heated unit and observed kettle pressure. Unit set to 230, cycled on and off never exceeding 20psi of pressure even on high. Could not duplicate issue while on site, likely temp controller issue. Part is expensive, don't want to condemn bad part unless sure its bad. Customer will wait and if issue persists, call back.