Your overcharged get a scale and weigh it in or find someone with the right tools ...get the gages on soon your damaging your system

 

Agreed, sound like you will find that the high side is triggering the over pressure switch at higher rpm. Too much "freon".

 

Savanna freon is a trade name used by dupont for thiere cfc 12 22 502 and 500 refrigerants . 134a is suva 134a its refrigerant its called refrigerant end of sermon .....like tissue - Kleenex




UOTE=Savannah Buzz;410461]Agreed, sound like you will find that the high side is triggering the over pressure switch at higher rpm. Too much "freon".[/QUOTE]

 

unless you have a vacuum pump, scale, gauges and a knowledge of HVAC, have a shop do it.
it will be cheaper in the long run; what no one seem to be saying is if your truck need gas it has a leak.
Refrigerant does not wear out or deplete or get old, if you system needs gas, where did the original gas go?
it probably need a front seal on the compressor or has a bad o-ring somewhere. you never add refrigerate to your frig or window ac do you?
bring it to a shop hopefully when they pull a vacuum the will also look for the leak.

 

To be more precise, instead of "freon" I should have said R134a. But most members on here don't have an EPA card in their wallet. EPA 608 - universal is what guys that work on home and commercial AC and refrigeration will have; the certification for automotive is EPA 609. So a guy that works on 1200 ton chillers may not have the permit to legally work on his own truck AC, it is two different but close to each other sets of rules. EPA wants specific handling of gases removed, in particular intentional venting to the atmosphere. They even have a place where you can report this, so they can bring fines of up to $10,000 for it.

Equipment to recover "freon" is not cheap, then you have to pay for it to be reclaimed, disposed of, etc. If it is all the same gas under common ownership it can be stored for use on more devices by the same owner (like a business).

And it is usually much cheaper to have a shop handle it. They have the equipment, tools, gauges, and some knowhow. Nothing like seeing a guy open up a drier for inspection at the parts store and toss it in a bag to drive home with.

And it is correct that there should be no loss in the system. Plenty of old R12 fridges still chillin'. One car design thing was to run the AC with defrost, so that in winter months the seals for the compressor would not dry out.

 

"They even have a place where you can report this, so they can bring fines of up to $10,000 for it."

The way they enforce it is the whistle blower gets 1/2 the fine.

 

From the looks of it I am in over my head. I have decided to take it to a shop to be evacuated and recharged. How much (if they don't know exactly) goes back in. The cans are sold by the oz but everywhere I see it says to weigh the proper amount. Is there a special amount I should be looking for?

 

yes, the shop should be weighing what they are putting in. there is usually a tag under the hood if not check the RAVE, but the rave should list two numbers an amount for a regular disco and a different one for a disco with rear air cond.

 

overcharged.