Author Topic: W111 heater not working  (Read 2157 times)

col320ce

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W111 heater not working
« on: April 04, 2020, 07:01:48 »
Hi
My w111 250se coupe ('65) is blowing hot air in the cabin. The valves in the picture I don't think have been put back correctly. I rotate the valve 90 deg at a time and 2 settings are very hot but 2 settings are still pumping warm air through. Any idea how to make the warm air ambient temperature??
Thanks for any help!
Col

1964 230SL
1965 250SE coupe
1993 320CE Sportline

PeterPortugal

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Re: W111 heater not working
« Reply #1 on: April 06, 2020, 08:19:14 »
Col,
Note that there is always a small flow of hot water through the valves so it might be right.
Regards
Peter
1963 220se Cabrio
1968 280se Coupe

dpreston Virginia

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Re: W111 heater not working
« Reply #2 on: April 06, 2020, 13:28:58 »
I have a 69 280SE and always had some hot air on my feet until I cleaned and lubed the cables so that that they fully closed. I used to have to reach down and close the valve completely but now that the cables move 100% works much better. I used the Technical manual for the Pagoda controls as a guide.
190SL 1960 Sold
280SL 1969
280SE 1969 cabriolet
Vette 67
Porsche 912 67

col320ce

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Re: W111 heater not working
« Reply #3 on: April 11, 2020, 13:08:02 »
I found these 2 write-ups that are for the 190SL but I think it's all similar.
Also this link is really good from another forum. https://www.benzworld.org/threads/w111-1965-220sb-heat-exchanger-hose-heater-valves-n900271015009.2964866/

I pulled mine apart and with the cables adjusted properly I think I should be able to fully turn them off (past the slit).  Here is a photo of the insert if anyone is interested.  The slit is on both sides, I assume so that the left and right are interchangeable.
Col

1964 230SL
1965 250SE coupe
1993 320CE Sportline