1992 Honda Accord. We changed the R12 AC with converter kit and then added the R134A refigerant. The pipes around the portal got really cold. But the air blowing out of the vents is still warm.

Propane does the same as R12. I don't recommend it though(highly volatile). Best to convert to 134R. Last time I converted an R12 system was about 10 years ago. I would tell you how to do it, but I could get in trouble because you have to vent out the R12 first. I don't even know of a shop that has an R12 unit anymore. Good for you, they still have the adapters to go over your ports and the 134R today is compatible with the old systems oil. No need to change the compressor, dryer, and expansion valve.

to convert from r12 to r 134 a the entire system has to be changed
that is condensor, compressor, evaporator, hoses ,the lot because r134a runs at much higher pressures than r12 ( nearly 3 times higher in psi)
it needs different gauges and has different fill connections so that the gasses cannot be mixed
to make it worse the oil used in the compressor is different because of the different gas and is not compatible with the r12
there was nothing wrong with r12 gas but companies and customers were "hoodwinked" into believing that the r12 was bad for the atmosphere and r134a was the answer
just as you have been " hoodwinked" by the person into getting a gas change over without being fully informed of what was involved and why
with r134a gas there has to be a fan in front of the condenser that works immediately the ac is switched on as the temp of the gas being converted back to liquid is much higher because of the higher pressure need to convert it back from gas to liquid
without that fan the system starts to circulate gas and so the evaporation of the liquid at the evaporator in the car is lost and no heat from the car is transferred back outside
what it means is this --- if you can get r12 gas , change the compressor back to an r12 compressor, have the system completely flushed, vacuumed down for at least 1/2 hour and then refill with r12
If on the other hand you have to use r134a because that is the only compatible compressor available then the evaporator , hoses and condenser have to be changed as well and that means a new ac kit basically
find yourself an accredited ac specialist shops and get quotes

could be fuse or relay causing pump not to kick on...also could be clutch on pump has failed...somethings you might check...

yes, L is for low pressure side or suction, attach refrig. to this port

This car originally contained R12, if you can find it you can use it. The other option if this has not already happened is you can convert the system from R12 to R134a, which is readily available, all auto part stores carry these kits. R12 AC fitting are threaded and R134a systems have slip on quick connect fittings.

R12 fittings are threaded on the outside and are smaller than R134a fittings which have no threads on the outside.

true all cars went from r12 to r134a in 1995 and its hard to find anybody who still does r12 but u can have ur a/c evacuated out and u can get a r134a retro kit for like $45, the reason i mention to get the retro kit and do it yourself is some places will charge up 2 $300 for something thats easy 2 do as puting air in your tires, at any auto parts store if ac isnt working now u should do a leak test

you need to charge your ac system on the low side ac line fitting. the connection will be the smaller one of the two fittings. is your system r12 or r134a?

Depends on if it takes R134 A or R12 refridgent. R134A most likley looking around $150 depending on amount of freon the system holds. if its R12 open your piggy bank cause its going to cost you some coin as R12 is no longer in production you have to convert your system to R134A or find a gararge that still has some R12

you need to have your system evacuated ac a service center i wont pay more than $5o for that cause u got r12 in there n u cant buy that anymore then u need r134a fittings to go on urs napa has the good ones i wold charge yourself case theyll charge $70 dollars a lb for r134a that u can 4 $7