The other problem is that the climate control could be busted. Check the fuse first though. If you do rebuild/buy a rebuilt climate control unit then make sure the auxillary waterpump is ok or you will burn the new one. I would just unplug the auxillary waterpump to be safe. It is not needed. If it is the water pump you will most likely be able to see the damage if you pull the control and pop the cover. You could even jump the circuit to test that. Good luck

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My Daily : 96 E-300 Diesel with 195,000 miles
Retired: 92 300D 2.5 T 345K miles and for sale
Retired: 95 E320 157K miles and currently parked with blown engine

Both retired cars are for sale as is my w124 shop inventory