Had Had A/C worked on , works OK but site glass looks foggy.

Had A/C worked on, Temp was 97 degrees today in Houston. On low the A/C blew at 41 on high it blew 51 degrees... I looked at the site glass with fan blowing , looked like fog flowing by ..... Am I low on R-12 ??
The car in question is a 78 300 SD W 116..
I had freeze 12 before ,, Had it taken out and replaced with R12....Earned my EPA 609 cert. on line...Thank You Juan...

[This message has been edited by juan (edited 06-23-2000).]

[Benzmac]

A foggy site glass is OK when the auxillary fans are on. I always charge mine until the glass clears and then cycles with bubbles and clears again. I have done this time and time again with no problems.

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Benzmac:
Donnie Drummonds
1992 500E (very soon I hope
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

[jrd]

Dear Benzmac,

I just had my AC system serviced and filled up with R12, but my aux fan never comes on! I asked them to check the aux fan for proper engine temp and AC operation, and they said it was working fine.

This is on the West coast, where it was about 65 today, but the intense sunshine makes the interior of a dark gray car very toasty. I ran the AC continuously for an hour and when I climbed the hill to my driveway and popped the hood, the aux fan was not on. (But the sight glass was clear with the compressor running, and the air was nice and frigid!)

Under what conditions can I expect to see the aux fan come on?

Thanks! Great site btw.
Justin Dobbs