Mercedes-Benz Automatic Climate Control System II Installation Manual And General Information page 20

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Step #13: Tidying and Testing (Continued)
(Blower motor question continued) controls whether or not the blower motor can get
power on non defrost settings. Once you bypass it, so long as the ignition is on, your
blower motor will run. If you cannot possibly find the vacuum leak, you can install a
toggle switch between the wiring harness bypass wire to manually control when the
blower is allowed to receive power or not.
I'm not getting any heat, what should I do?
-Make sure you've given the engine plenty enough time to get warm. Then check both
inside the central control unit case (remove the four screws on top) and on top of the hot
water valve to make sure the vacuum lines haven't slipped off any part of the kit. Contact
me if you need any additional help.
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