AC Help !! convert back to R12 - PeachParts Mercedes-Benz Forum

Fred Jan · #1 05-11-2020, 11:59 PM

Quote:

Originally Posted by BWhitmore

I agree with Diseasel300. Converting back to R12 will not achieve your goal. Limiting hot water to the heater core is a good step. I think you have a weak charge of freon.

The car had been charged 4 time in the past 3 years:

Dealer ship result:55F from center vents at night , mid 70 during the day
AC shop result: 52 from center vents at night , 70 in during the day
Me result: 52 from center vents at night , 70 in during the day
Me Using enviro safe 134A replacement, same result

engine temp above +80, when driving 80, sitting in traffic its better to roll down the windows and 100c engine temp

JHZR2 · #2 05-15-2020, 12:59 PM

Quote:

Originally Posted by Fred Jan

The car had been charged 4 time in the past 3 years:

Dealer ship result:55F from center vents at night , mid 70 during the day
AC shop result: 52 from center vents at night , 70 in during the day
Me result: 52 from center vents at night , 70 in during the day
Me Using enviro safe 134A replacement, same result

engine temp above +80, when driving 80, sitting in traffic its better to roll down the windows and 100c engine temp

So now youre using ES-12a?

Regular or industrial? Did you pull a vacuum?

Max pressures can go haywire with these blends depending upon how they are charged. That can affect efficacy.

Fred Jan · #3 05-15-2020, 11:29 PM

Quote:

Originally Posted by JHZR2

So now youre using ES-12a?

Regular or industrial? Did you pull a vacuum?

Max pressures can go haywire with these blends depending upon how they are charged. That can affect efficacy.

ES 134 industrial 134A replacement
Yes pulled vacuum for 1 hour