Excella A/C recharge

[jckolding]

My A/C unit doesn't produce the coldest air--believe in needs a recharge. Since it's a 1982 Excella, my guess it's R12. Has anyone used R134 to replace and recharge this Coleman unit and had success? I have replaced and recharged autos and have have the equipment to deal with either R12, or R134. Thanks

[DKB_SATX]

If your Excella has its original unit, it uses R22 I believe. It's definitely not R12.

[Lance M]

If it is a Coleman unit, it is probably a sealed unit without Schrader valves. It is more than likely R22. If it is low on refrigerant, it is leaking and that needs to be fixed.
It is possible to retrofit the schrader valves, evacuate, repair and recharge, but you'd have to be able to do it yourself. It can be done. You'd have to decide if it is worth the effort or not.
I would suggest a new Dometic Penguin II low profile high capacity unit.