JHZR2
Staff member
Hello,
What is the best means of "sniffing" and characterizing the freon or refrigerant in an AC system?
My 81 MB has the original receiver/dryer, compressor, etc. When I cycle it, it blows barely cold, though the compressor does engage. I do not think it cycles though.
My concern is that there is a "quick connect" fitting on the low side of the system.
I have all records for the car, but I do not have any record of a recharge. The air blew plenty cold all last year. Still, if the PO did something stupid, like topped R12 with R134, I want to make it right. If it was a matter of simplicity to use the quick connect to do R12 (which may be illegal, right?), then I want to still make it right.
I have R12 and can top that, but I want to be definite. Is there a way to DIY this, or do I need to take it to a shop? Say someone did something stupid like top off with Freeze-12 or similar, how can I be sure that I account for this too?
Now, two other quick questions:
-the car is 28 years old and all original. Does it make sense to evacuate the system and do an "oil change" anyway?
-if I want to top it off, can I use my R134a gauges for R12? I know the fittings are correct to do this. Is there a set of best practices to purge either out prior to switching to the other refrigerant?
Thanks!
What is the best means of "sniffing" and characterizing the freon or refrigerant in an AC system?
My 81 MB has the original receiver/dryer, compressor, etc. When I cycle it, it blows barely cold, though the compressor does engage. I do not think it cycles though.
My concern is that there is a "quick connect" fitting on the low side of the system.
I have all records for the car, but I do not have any record of a recharge. The air blew plenty cold all last year. Still, if the PO did something stupid, like topped R12 with R134, I want to make it right. If it was a matter of simplicity to use the quick connect to do R12 (which may be illegal, right?), then I want to still make it right.
I have R12 and can top that, but I want to be definite. Is there a way to DIY this, or do I need to take it to a shop? Say someone did something stupid like top off with Freeze-12 or similar, how can I be sure that I account for this too?
Now, two other quick questions:
-the car is 28 years old and all original. Does it make sense to evacuate the system and do an "oil change" anyway?
-if I want to top it off, can I use my R134a gauges for R12? I know the fittings are correct to do this. Is there a set of best practices to purge either out prior to switching to the other refrigerant?
Thanks!