Replaced climate control servo still no heat? - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 07-16-2011, 09:50 PM Thread Starter
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Date registered: Oct 2010
Vehicle: 1978 300D W123
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Replaced climate control servo still no heat?

Hey any info would help at this point!

I replaced my evil servo with a rebuilt aluminum body unit and a new amp behind the glovebox. Im not getting any heat from the 2 hoses on the backside of the servo? Almost like its not turning on.

I hear no humming from the servo when the ignition is on?

Where is the fuse for the servo?

My vents blow air from all settings just not hot

Once again guys thanks for any info

1978 300D W123

Last edited by dirkfunk; 07-18-2011 at 06:43 PM. Reason: Add info
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post #2 of 5 (permalink) Old 07-17-2011, 11:23 PM
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Have you flushed your system? Did you get heat before you replaced the servo?
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post #3 of 5 (permalink) Old 07-18-2011, 02:03 PM Thread Starter
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ive flushed the system, and no I did not have heat before the replacement.

After further probing I noticed hot water is getting to the Aux pump and not to the servo.

Can I just bypass the aux water pump? I live in San diego Ca so the weather is fine.
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post #4 of 5 (permalink) Old 07-18-2011, 05:39 PM
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You might want to mention what year/model car you have since that will make a big difference...

Currently: 1967 250 SL, 1963 220Sb, 1965 300SE Lang, 1971 280SE parts car, 1972 Alfa GTV, 1965 Alfa Duetto, 1993 BMW R100R
Past: 1971 250 C, 1985 300 TD, 1967 250 S, 1968 280 S,1981 300 D, 1982 280CE, 3 Facel Vegas, Borgward Isabella Coupe, Alfa 2600 Sprint, Volvo P1900 (yes), numerous less interesting Volvos, ...
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post #5 of 5 (permalink) Old 07-18-2011, 09:20 PM Thread Starter
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1978 300D
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