Ok, since you feel the air get stronger when switched to cold then that may be a sign that the blend door is working. Is the vacuum line going to the heater valve on securely? Have you tried raising your RPM to about 3500 for a few seconds with the heat on to be sure there is not air the system (also with the engine cool, remove the radiator cap to be sure there is a good coolant level. I would even leave it off while you do the RPM cycle to be sure to push all the air out it there is any). After those tests, If you still do not get heat then I would suspect your valve. The valve should be in the engine bay with a gray vacuum hose going to it I believe, and of course heater hoses attached to it. All you have to do to replace it is remove the hoses on the valve and the vacuum line, then just pop the new in. Of course you will need to top off your coolant and purge all the air out of the system.
Sunday, November 16th, 2014 AT 1:27 PM