Dash air blowing cool / hot
I have a 2006 Sightseer that we bought last year. A/C was repaired before we took delivery, new compressor, drier expansion valve. If you grab the tubing after the expansion valve it is very cold and the line all the way back to the compressor is cold. I have connected gauges and the charge is correct. So it appears that the actual air conditioning circuit is working, but at best it blows just COOL air from the vents. I have placed a manual shut off valve in the heater hose to keep hot coolant out of the heater core. Also, if set to max cold it will blow from the dash vents for a while then change to the defroster vents. I suspect the doors that direct the air are messed up. Is there any literature that shows how this system is set up? Also how do you access that part of the system? From underneath? It is not clear to me how you would access this from inside the rig. Any help or tips would be appreciated.