SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Mixing R134a and R12

Old Sep 1, 2022 | 04:18 AM
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r230 2003
Mixing R134a and R12

Hi
When you filling up the AC. Can you mix R12 with R134a or dou you need to drain the R134a ?
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Old Sep 1, 2022 | 07:54 AM
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Why would you want to put R12 in a R134a system?
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Old Sep 1, 2022 | 08:20 AM
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They can’t be mixed
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Old Sep 2, 2022 | 02:11 AM
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r230 2003
Instead of daining the exsting
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Old Sep 2, 2022 | 05:09 AM
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NOOOOOOOOOOOOOooo

You do not drain an AC system.
You recover refrigerant and vacuum pump the system down to very low vacuum and then let it sit to check for leaks.

Then you can refill using proper gage manifold and refrigerant to amount manufacturer states.



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Old Sep 2, 2022 | 09:52 PM
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Originally Posted by MikeJ65
Why would you want to put R12 in a R134a system?
Either you have deep pockets to purchase r12 and install it in a system designed for 134, or you have a car that was designed for r12, and have limited funds, but want to get cool air, and simply posted in the wrong forum?
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Old Sep 4, 2022 | 01:14 PM
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Originally Posted by cdk4219
Either you have deep pockets to purchase r12 and install it in a system designed for 134, or you have a car that was designed for r12, and have limited funds, but want to get cool air, and simply posted in the wrong forum?
If that were the case you can convert an R12 system to use 134 without too much problem.
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