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1995 S320
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11 Posts
Discussion Starter #1
'95 S320 This summer I replaced the blower regulator and the AC worked great. Now, the fan blows but I have no heat.
I picked up a used duovalve & pump.
How can I check them to be sure they are good before I replace them. Also, can I just replace the upper part and not have to replace the lower housing & hoses?
 

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Registered
1995 S320
Joined
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11 Posts
Discussion Starter #3
No Heat

the duo-valve & pump I have I took off of a wreck, how can I check them to be sure they are good before I install them on my car?
 

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Registered
1995 S320
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11 Posts
Discussion Starter #4
What isThis Part

What is the pasrt next to the duo-valve marked MOD
It has an arrow pointing to the left, then MOD
 
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