Join Date: Jun 2008
Location: East Bay, Northern California
Re: AC in 1970 Malibu not cold enough
Yes, it is an aftermarket mod. As I said, I got it from Year One and it is made by "Old Air Products." I couldn't find a POA valve in my parts store at the time so I ordered one from Year One.
Again, I understand it does not add freon as this is a closed system. I must have worded things improperly. I believe the original unit relied on negative pressure to bleed/pull freon through the system. The way I understand this one is that it relies on an electrical valve of some kind which periodically opens to permit freon to circulate. I may be wrong on this. It seems to me, however, that it's not allowing freon to circulate often enough so I get intermittent cold then warm airflow. I need more cold air flow.
There's no water anywhere in my vehicle. Well, except when it rains as I have to redo the firewall body seals! But that started happening long after I had this "new" POA valve put into place. I'll trace down the wires later to see where they lead.
I also emailed Old Air Products to get their opinion.