[W126 Coupe] No heat

[Axel Wulff]

Sounds like you need a new monovalve. This valve regulates the flow of hot coolant (yeah, kind of an oxymoron...) from the engine into the heater core underneath the dash.
 
If you only get heat at speed, it would indicate that your aux water pump is not operating. This is the pump that help circulate coolant through the heater core at low engine revs.
 
Make sure you disconnect both the monovalve and the aux fan and verify they work OK. The reason is they ground through the AC pushbutton panel and if either of them are shorted, they'll fry the pushbutton box as well.
 
Jonathan and George Murphy should be able to help you out. About $50 last time I changed mine, but the Euro has gone up since then.
Regards, Axel J. Wulff610-731-5453 Cellular610-572-4611 Home


From: samsisic at comcast.netTo: mbcoupes at mbcoupes.comDate: Mon, 5 May 2008 19:29:43 +0000Subject: [W126 Coupe] No heat
Hi all,
Recently, I've been getting no heat in my 88 SEC.
I checked that the coolant level is good but no heat blows on interior after the car has reached normal operating temp...
What could be causing this? 
Thanks,
Sam
Chicago
 
p.s. I have recently changed my e-mail cotact information... For those interested. I finnally installed a computer at home... I took the blue pill and am now officially in the MATRIX... Scarry!!!!
 
 
 
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