heater valve problem?
 

Replaced a new heater valve on my 88' 944s a couple days ago.Now my car only blows hot air!!My AC worked fine before the replacement.The AC still works now,but with the hot air blow out constantly.What did I do wrong?Is there any special installation tip on the heater valve?How does the heater valve works anyway?Does anyone has simliar experience?Please help..

Great thanks..

Check the operation of the heater valve first, get someone to operate the heater control and check the valve closes and opens.
Make sure the vacuum line is connected properly. If everything was ok before then the most likely scenario is that it's something you touched, so check that first.