Midnight_rex
Junior Member
- Joined
- Jun 21, 2016
- Posts
- 13
- Reaction score
- 1
- Ram Year
- 2011
- Engine
- 4.7
I have a 2011 1500 with a 4.7L. I replaced my evaporator core a couple years ago due to a leak and also replaced the expansion valve. After a good vacuum and recharge the AC worked good up until recently.
There has been a hissing sound coming from the passenger side underneath the glove box area when the AC is turned on. It happens when im in higher RPM while driving for about 5 seconds and then fades away. Also, after driving for about 20-30 minutes air from the vents start to blow weak but still cold. It gets to the point where i have to turn the AC off because the evaporator core freezes and i would have to let it defrost.
a couple of weeks ago i pulled a vacuum for about 1 hour and half and recharged it to factory specs. Its still doing the same thing. Am i not putting enough freon in the system? Im measuring with a small weight scale as im filling the system.
Could filling the system with a lil more freon fix this issue? Yes i have a set of manifold gauges and a good vacuum pump. Any suggestions could help. Thanks.
There has been a hissing sound coming from the passenger side underneath the glove box area when the AC is turned on. It happens when im in higher RPM while driving for about 5 seconds and then fades away. Also, after driving for about 20-30 minutes air from the vents start to blow weak but still cold. It gets to the point where i have to turn the AC off because the evaporator core freezes and i would have to let it defrost.
a couple of weeks ago i pulled a vacuum for about 1 hour and half and recharged it to factory specs. Its still doing the same thing. Am i not putting enough freon in the system? Im measuring with a small weight scale as im filling the system.
Could filling the system with a lil more freon fix this issue? Yes i have a set of manifold gauges and a good vacuum pump. Any suggestions could help. Thanks.