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#1
08-28-2004, 07:03 PM
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HVAC problems - need help!
I bought a 1984 190D with the 2.2 diesel from my grandmother last summer and, just in the last three months, the electro-mechanical fan has quit working, the heater has stuck on and the enigine diesels every time I try to shut it off. The manual shutoff works every time, but I was wondering if any of these problems are related. Regardless, it would be nice if anyone could shed some light on any one of these problems. Thanks in advance.
-Blake 
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#2
08-28-2004, 07:18 PM
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Answers
My Error: Your mono valve is bad. RE: Heat on all the time.
 Thanks jbaj007 my mistake, could not consult FastLane to verify part. Suspect leaking vacuum lines.  You need to test the heater valve vacuum motor. Very possible you have cracked or brocken vacuum lines causing both problems.  Our hero: http://www.mityvac.com/ Last edited by whunter; 08-29-2004 at 12:50 AM.
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#3
08-28-2004, 09:54 PM
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Replace fan clutch electro mag... $118 Fastlane
New heater valve...$20 (Don't think the 190D has a monovalve  )It "continues to run" (of course it "diesels"; it's an OM ), usually a leak in vacuum system somewhere. Time for the superhero of diesels....The Mityvac!
__________________
The Golden Rule 1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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#4
08-29-2004, 12:40 AM
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Gadzooks
Quote:
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1BI00S9Z5&year=1984&make=MB&model=190-D-001&category=R&part=Heater+Valve 1984 Mercedes Benz 190D 2.2 Part: Heater Valve Vacuum controlled. R3020-11893 Heater Valve IN STOCK $19.80
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ASE Master Mechanic https://whunter.carrd.co/ Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 2003 Volvo V70 https://www.boldegoist.com/
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#5
08-29-2004, 11:27 PM
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Thanks for the help.
-Blake
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