Let me take you back a couple of weeks...AC starts to blown hot air from the side wents, AC works fine only on MAX AC low or high but not on AUTO AC.
I checked the fuses, sure enough, fuse #7 blown. Check the archives, everything suggest to a bad monovalve. I blocked the hose to the heater valve to check if a bad monovalve or a bad AC controller as suggested by Steve. Everything works fine, so I have a bad monovalve. No big deal I will change in the next couple of weeks when I get some time ( I though).
Last week I noticed, the coolant level low, I added some coolant and hoped for the best. This past weekend I checked the coolant level and it was low again. This time I find a coolant leak on the drivers side behind the AC compressor. A sign of a bad water pump.
Question is: Would a bad monovalve kill the water pump or viceversa? I am also suspecting a bad auxiliary water pump...
What do you guys and gals think?

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J.H.
'86 300E