Just a note -

I have noticed that since I fixed my monovalve last winter in my W126, not only does the heat work better, but the A/C appears to blow colder now as well.

I guess this may be because it was always leaking a small amount of coolant through to the heater core. Not enough to heat the car when cold, but enough to make the A/C less effective.

It could be my imagination, but I could swear that my A/C is significantly colder now.....



-tp

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition

Yes, I found this out when I swapped an entire monovalve assembly from my 300SD to 300SDL and, in fixing the heat problem, also got the A/C working. Now THAT was a real bonus!

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1987 300SDL 265,000 mi.
1982 300SD 325,000 mi. (and holding)
1956 Packard Clipper 150,000 mi.

mines look so innocent, but somehow did blocked the hot water passing thru. I unclip the C clip pull the rubber valve out, the hot water was abundance. Never had so much heat before.
It got to be a modern day Fuhrer's revenge.

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