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Can i install a r134a compressor in a refrigeration unit running with r12 refrigerant

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No try hot shot that a replacement for r12 i have used it works will add some life to an older unit

Posted on Oct 08, 2010


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91 Mercedes 300 E has R12 ac system that is no longer blowing cold. A faint bit of cool air sometimes shows up but it can hardly be called cool. Is there any additive out there compatible with R12?

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.

Jun 06, 2016 | AC Cars & Trucks

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How do you convert from r12 to134a

Recover R12 then flush system. Change drier or receiver tank depending what vehicle you have. Change expansion valve or orifice tube again depending what vehicle you have. Install the R134a Hi and Low service ports and put the correct amount of compressor oil for R134a freon into compressor. Pull unit into a vacume for about 15min. and leave it set for another 15 or 20min. to make sure it stays in a vacume and there are no leaks. If it holds a vacume charge the unit with the correct amount of R134a and run unit and check that it operates and cools properly. If all is good install the service port caps and your done.

Jun 24, 2014 | Cars & Trucks

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Can 134a refrigerant be put into a R12 a/c system?

no --it cannot. R12 gas operates at a far lower pressure that r134a so if you want to use r134a gas you will have to replace compressor ,evaporator and condenser and have a cooling fan for the condenser fitted

May 20, 2014 | 2000 Chevrolet Cavalier

2 Answers

What type of refrig. does the AC use in a 92 dodge caravan

Unless the labels are missing from the car, it will state which type of refrigerant is used. Could be either R12 or R134a. If originally R12, it could have been replaced by R134a with an upgrade kit. The easiest way to tell if the labels are missing, is to look at the valves on the AC system. If they are Schrader valves (same as used on tires), then it is the older R12. If the caps are Red (high pressure side) and blue (low pressure side), then it is R134a. The sale of R12 to non-certified mechanics is illegal in all states as far as I am aware. R134a is available in most states and retro-fit kits are available in most states.

I have done the retro-fit on 2 vehicles with acceptable results. It is recommended to remove all the old R12 with a vacuum pump. Autozone (in my area anyway) rents these.

Good luck if you need and decide to retro-fit yourself.

Jul 04, 2011 | 1992 Dodge Caravan

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Hi,my compressor is running on r12 gas, is it possible to repair it

Good day,
The problems that occur on R12 systems are no different than the newer R134A units.If it involves using R12 it would be a little more expensive, but since they use approx. 6 to 8 ounces it really isn't that bad.

Sep 08, 2010 | Hotpoint (HSM25IFTSA) Side by Side...

1 Answer

What is the refrigerant in my 1991 LS400 Lexus?

R12 is not sold no longer so look on the compressor for a tag of what freon to use. Conversions kits are sold for older cars to use R134a

Jul 10, 2010 | 1991 Lexus LS 400

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Air is not very cold on a rv roof top ac what tools are needed in recharge

You should have the manual for this unit handy and as far as recharging tools go. You only need a can of R134a *(if the unit is R12 you need to buy upgrade adapters since R12 is no longer sold) Run the unit and put the R134a filler line on the low pressure side of the compressor *(from manual...dont guess as trying to charge the high pressure side is VERY dangerous). Get the charge just into the Green zone on your charger and that is it! Try not to fill too high in the green zone....I know it sounds funny...but AC's usually work better when they have the low end of their optimum fill. R134a doesnt work as well as R12 so be sure you buy the R134a with cooling enhancers. Your local Autozone can guide you to the right filler/product combination.

Good luck and be careful!

Jun 30, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Will there be a problem if my R12 freon was changed to 134A without changing any of the components in my airconditioning?

yes the oil will be your problem and r134a is 25% harder on condensing and you may get a bit of flood back to compressor


Mar 29, 2010 | Randell 20072SC R-134a Refrigerator

1 Answer

Need replacement R12 refer and freezer compressors. OEM Americold compressors no longer available. URS 48 DT model should also work. Thank you.

You can use R134a compressors with the Poly oil in them and use R12 or R134a (flush the remaining old mineral oil out of the system first). Match your BTU requirements.

Dec 30, 2009 | Refrigerators

1 Answer

Which gas was used in refrigerator

Prior to 1999, all refrigerators used R12,commonly called "Freon".
After that date due to mandates by the Montreal Protocol, the refrigerators were forced to switch to R134A, the same refrigerant used in automobiles since 1994.
R134A is less efficient, and far more troublesome than Freon 12, but the manufacturers had no choice.
Somewhere on your machine there is a placard that lists they type of refrigerant. Inside the freezer compartment or fresh food compartment, along the front rail of the machine behind the grille, or on the rear of the machine, many times even on the compressor itself.
It will usually give the amount of charge in ounces along with the type of refrigerant.
If it says dichlorodifloromethane then it is the old method of describing R12.
Units in leisure vehicles running on gas instead of electricity, use ammonia.

Oct 30, 2009 | Kenmore 50522 / 50524 Side by Side...

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