88 420 SEL No Heat Just Cold Air/Service & Repair Manuals

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I have an 88 420 SEL that started blowing cold air from vents....all vent
systems seem to be operating properly and the temp display over the steering
column is working ok, any ideas on the fix, is it a sensor or the whole temp
control unit, how can I test without a diagnostic tester quickly available.  The
T-stat was just recently changed before I bought the car, any help?

Would also like to purchase the service and repair manuals for this auto, I have
all owners manuals and service guide that came with the vehicle where it had
been stamped as being serviced by MB dealer in Lexington, KY plus all service
records and reciepts for oil changes and brakes and that type of info. Would
ebay be a reliable source?
Thanks for any help
Tim


Re: 88 420 SEL No Heat Just Cold Air/Service & Repair Manuals

I think there is a unit called the "mono valve" that could be your problem.
Check that first.
___________________________________________

systems seem to be operating properly and the temp display over the steering
column is working ok, any ideas on the fix, is it a sensor or the whole temp
control unit, how can I test without a diagnostic tester quickly available.
The T-stat was just recently changed before I bought the car, any help?

I have all owners manuals and service guide that came with the vehicle where
it had been stamped as being serviced by MB dealer in Lexington, KY plus all
service records and reciepts for oil changes and brakes and that type of
info. Would ebay be a reliable source?


Re: 88 420 SEL No Heat Just Cold Air/Service & Repair Manuals

Thanks Rockman59, I will be looking into this on Saturday,
it is still winter in Ohio.......that heat will feel good!!
Tim


Re: 88 420 SEL No Heat Just Cold Air/Service & Repair Manuals

http://tinyurl.com/2jfbj and

http://tinyurl.com/27clo

Good luck.
Joanne



systems seem to be operating properly and the temp display over the steering
column is working ok, any ideas on the fix, is it a sensor or the whole temp
control unit, how can I test without a diagnostic tester quickly available.
The T-stat was just recently changed before I bought the car, any help?

I have all owners manuals and service guide that came with the vehicle where
it had been stamped as being serviced by MB dealer in Lexington, KY plus all
service records and reciepts for oil changes and brakes and that type of
info. Would ebay be a reliable source?


Re: 88 420 SEL No Heat Just Cold Air/Service & Repair Manuals

Thanks JoAnne, I got a lot of good stuff from there.
Tim


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