Dash AC in 1989 Beaver Marquis

[Ted Couch]

Does anyone know how many pounds of R12 refrigerant is needed in the AC unit in my 1989 Beaver Marquis?

[David T. Richelderfer]

This may help if you know where your condenser is located.

http://beaveramb.org/forum/index.php/topic,8915.msg61145.html#msg61145

[Mandy Canales]

Ted...I have a '90 Marquis and depending on how low the Freon gets or how warm/or cold the air coming out it seems that two cans should be enough.  I place a small thermometer in the vent and that helps determine the number cans to use.  Hope this helps and good luck.

[Eric Maclean]

Hi Ted
I've posted this somewhere on here before but here we go agian .
If you can see the top of your receiver dried check to see if it has a sight glass if so add refrigerant to the running system at a good idle ( 750 to 850 RPM)
Add refrigerant untill the bubbles stop showing in the sight glass and then add another 1/2 pound of refrigerant.
You may need a light to see the bubbles and remember a clear sight glass means the system is either completely empty or very low or the system is full.
Vent temperatures are reliant on air flow through both the condenser and evaporator and your system I believe uses a trinary switch to control a relay for the condenser fan your system performances can be unhanded by sitting the relay to run the condenser fan full time when A/C is on this allows the system to move more  heat away and  there for lows vent temps as well.

This has been a long standing rule of thumb and hasn't let me done yet.
Good luck
Eric