Yep.

Wilton

----- Original Message ----- From: "Dieselhead" <126die...@gmail.com>
To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Sent: Thursday, November 04, 2010 12:31 PM
Subject: Re: [MBZ] 91 350SDL cool heater


What Jim said Plus: Assuming that the coolant is not low or airlocked. But since this is Wilton, I am sure he has checked for that regularly.

My thoughts, too, re. monovalve, etc.  Thanks.

Wilton

----- Original Message ----- From: "Jim Cathey" <j...@windwireless.net>
To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Sent: Thursday, November 04, 2010 10:43 AM
Subject: Re: [MBZ] 91 350SDL cool heater

AC system in my SDL cools very nicely, and cooling temp. control is very effective and immediately responsive by turning the temp. adjust wheel, but heating mode (even full heat), air from the ducts gets only slightly warm. Whata ya think? Monovalve stuck closed/nearly closed? Tips?

Your car is dead, you need to sell it cheaply to me.

(Read: Yes.)

Start by unplugging monovalve and see if you get full heat.
Remove the insert and look for tears in the rubber.  Check
the screen for clogging.  Auxiliary water pump working?

-- Jim



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