Hello,

I have try that before! I susepect that is the heater value internal leak, and ask the dealer for part, and they ask me to try to check again, as the parts are expansive... (I am in England)..

Afterward, I found that is the temperature control knot cause problem.... The problem for me is come from the potentialmeter for the temperature control, the ECU of the temperature control use the value of resistance for the temp control to control the heater value, so try to clean it up with some electronical solvent, same as what I have done for mind, I think u could solve the problem...

hope this can help...

Gary!