[AT] Air conditioning problems In my parts getter...

[Cecil Bearden]

R1234y, and it is expensive.  I imagine it is developed by Dupont and 
they need to get their money back.  The patents ran out on 134, so they 
had to bring in something expensive again.  It is also flammable, So, 
why couldn't propane be usuable for refrigerant??  It is also 
flammable..  But a lot cheaper....

Cecil

On 6/12/2021 8:50 AM, Phil Auten wrote:
>
> OK, so if R134a is no longer blessed by the EPA, what is the preferred 
> refrigerant for automotive use? I am not up on all of this as I 
> haven't had to have an AC system repaired since about 2005.
>
> Phil in TX
>
> On 6/11/2021 10:35 PM, Brad Loomis wrote:
>> I hope you meant a detector for the current refrigerants and not NH3. 
>> Ammonia only requires your nose or a sulphur stick. And for those 
>> that may want to try their hand at refrigeration, a lot of the newer 
>> domestic/commercial units use either propane, R290 or isobutane 
>> R600a, as refrigerant. I'm not sure what the automotive industry is 
>> going to move to. I got out of commercial refrigeration not long 
>> after the requirements to recover and the end of R12, R22, R502, R11, 
>> and the rest of the chlorinated fluorocarbons.It was an awful time 
>> never knowing what someone put into what system. Then came 410a in 
>> A/C. Now that's going away. Customers didn't like to hear, we don't 
>> use that refrigerant, we'll have to recover it, time consuming, and 
>> charge your system with an EPA approved refrigerant, maybe have to 
>> change the oil, etc, etc, equipment was slow so labor costs were 
>> absurd. Like I said, ammonia is safe, easy, efficient, and well,  
>> dangerous in the wrong hands. :)
>> And the bigger warning would be to never pressure test any system 
>> with oxygen.
>> And by this discussion it is apparent why automotive is the driving 
>> force for EPA  to regulate what goes into the atmosphere. A billion 
>> leaking autos is a lot of gas into the atmosphere. It just moved to 
>> HVAC and refrigeration because of the same gasses.
>>
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