map40
Sep 29, 2014Explorer
2006 E450 AC problem - FIXED
So, my AC defaults to defrost when I loose vacuum. I know what you are thinking, the check valve in the vacuum tank. Maybe, but not.
Here is the info:
1) I check the pressure in the black line going to the vacuum manifold and it goes up to 15 psi
2) I added another check valve with vacuum tank
3) I check the pressure with a hand pump and moved all the actuators, no leaks after the manifold
So, as I'm driving and I accelerate, the pressure drops. The check valve does not stop it.
If i disconnect the line to the engine, it WILL STOP LOOSING PRESSURE
So, we tried with the engine on, shutting the engine off and it will loose the pressure within 4 seconds. If I disconected the feed from the engine, it will stop loosing vaccuum, because the check valve would work.
Any help will be greatly appreciated.
ON EDIT - Fixed. I runed a line from the connection by the engine oil fill tube through inside of the fender to a rubber gromit covering a hole right behind the door wire harness. Once inside the cabin I installed a vacuum tank with a check valve. I just router it to the top covered actuators and hook it up to the manifold. No holes to drill, $20 and 20 minutes of work, all it took. I'll see if I can a few pictures.
By the way, a dealer quoted me $900, and AC shop $500.
Here is the info:
1) I check the pressure in the black line going to the vacuum manifold and it goes up to 15 psi
2) I added another check valve with vacuum tank
3) I check the pressure with a hand pump and moved all the actuators, no leaks after the manifold
So, as I'm driving and I accelerate, the pressure drops. The check valve does not stop it.
If i disconnect the line to the engine, it WILL STOP LOOSING PRESSURE
So, we tried with the engine on, shutting the engine off and it will loose the pressure within 4 seconds. If I disconected the feed from the engine, it will stop loosing vaccuum, because the check valve would work.
Any help will be greatly appreciated.
ON EDIT - Fixed. I runed a line from the connection by the engine oil fill tube through inside of the fender to a rubber gromit covering a hole right behind the door wire harness. Once inside the cabin I installed a vacuum tank with a check valve. I just router it to the top covered actuators and hook it up to the manifold. No holes to drill, $20 and 20 minutes of work, all it took. I'll see if I can a few pictures.
By the way, a dealer quoted me $900, and AC shop $500.