Quote:
Originally Posted by Adonis
Would there be a way to tell if that is the case? I have had the unit out and it responds appropriately to voltage and I can see it working when ac is switched on and when the heater is switched on.
If the new unit is faulty, what should it look like when I take it out if it is not under load. Should it be fully extended due to pressure from the fluid? The part that I have seems to have a suction issue when I pull it out due to the rubber would this also be an issue?
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Diagnostic.
With the vehicle running at operating temperature.
When you disconnect the wire, you should have instant 100% heat.
If you do NOT have heat with the wire disconnected = the mono valve is defective or you have air trapped in the system..
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1985 300SD
1983 300D
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