Climate control is not working before i buy another from the junkyard or part store there an a part number on side of the unit,do i match that part number with the new one? If so do the number need to be the same? For EXAMPLE on my old unit the part# F6-VF-18C612-AB Do the replacement unit part# need to be the same?

SOURCE: new climate control unit but when on blower not working for heat or ac

I'm assuming the problem is the blower motor isn't coming on or working. 1st, check the fuse. 2nd, remove the glove box or pull the 2 tabs that act like stops when it's open ( the glove box will open out further) and you'll see the power plug connector for the blower unit. Turn on the blower through the climate control (heat, A/C, or whatever) and wiggle the connector to see if the blower turns on. If starts working, then an easy solution is pull the connector off and gently press the prongs together or inward. Then carefully reconnect with damaging the prongs. This worked for 96 Mark VIII due to the fact the prongs were not "seating" correctly in the female connector. It's been about 2 years since I did this and the connection is still good. If wiggling the plug doesn't work, pull the plug, turn on the climate control (heat, A/C), and check for voltage to the plug. That's about all I can help with.

SOURCE: Part # 2L24-18C612-AA 2002 Merc

Honestly---? Try eBay.