[diesel_mercedes] Solved heater problem 84 300D W123

 

Solved heater problem 84 300D W123

Symptoms:
- full heat all the time when temp dial anywhere but "MIN"
- full cold when in MIN detent

Solution:
Part number 0008221003 - the mystery box

- Junkyard pulls are all over ebay starting around $50.
- brinsonco.com has them for $115 reman by not-Programa/three year warranty

Be aware that when other components upstream from this unit go bad, the problem can cascade downstream and burn out this box. These include the monovalve and the electric coolant boost pump. I checked my monovalve for resistance and it was 17, which was within the 11 to 19 acceptable range. I forget what the boost pump range is because I didn't check it...I put a new one on the car. ebay $90.

Spending too much money on this car.

Jim

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[diesel_mercedes] Re: Re : Serious Cold Wx. Starting Drill

 

Ha Ha, I remember my 6 volt VW bug. When you turned on the headlight switch it took a few seconds for the lights to actually come on. When I moved to the arctic region of N.E. Washington I had to install a 8 volt battery to get it to start. max

--- In diesel_mercedes@yahoogroups.com, "Nate" <vwnate1@...> wrote:
>
>
> O.K. Caitlin ;
>
> Just pop the hood after shut down and disconnect the _negative_ battery cable clamp , then in the morning it'll have plenty to get you fired up .
>
> This was a mandatory thing when I lived in New Hampshire in the 1960's & we had mostly crappy old worn out 6 volt vehicles , even the clock would run the battery down too far to start reliably in deepest winter .
>
> Just remember : DO NOT allow any fool to spray ether (starting fluid) anywhere near your precious Mercedes as it WILL kill the engine ! .
>
> Next time I remind you to have the valves adjusted & do the Diesel Purge & thin hot oil & filter change in August or September , I'm betting you'll listen .
>
> At this point ,it's prolly $ well spent to have your local Indie M-B Garage do it , you can prolly hang around & drink coffee while they do it , takes a few hours in the cold though .
>
> Keep the faith ! Spring *is* coming .
>
> -Nate
> C

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