It may be that the monovalve has stuck in the open position or the monovalve is good and just recieving the wrong signal from the climate control unit. Check to see that the valve is working properly first.

__________________
Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record