EATC or BCM: Blower fan stopped

[dac99011]

My blower fan started running on low speed no matter if I selected the high fan speed on the EATC unit or steering wheel. I tried turning it off and on with no luck changing the blower speed.

The next time I started the car, the blower fan quit working no matter what temperature or vent/fan speed setting was set. Does this sound like the EATC unit o-ring issue or the BCM module? I couldn't find any post with anyone describing issues with the fan blower quitting.

Thanks for the help!

2003 Black MM stock with 95k

[fastblackmerc]

BMC

Try tapping the BMC, if the fan starts working it's the BMC.

FYI...

If the A/C or heat doesn't come out the vents it's supposed to, the EATC o-rings are shot.

[Pat]

There is a replacement proceedure for the BCM on this site. Also there is a repair proceedure for the BCM.

[SC Cheesehead]

Could be a ground wire issue as well.

[dac99011]

Thanks for the replies! This is one of the best forums I have been a member of. I tapped the BCM and the blower fan turned on! I'll replace the BCM when Ford is open tomorrow. Thanks!

[Lou]

My fan just quit working too. Where is the BCM located and what does it look like?

[BODYMAN]

tap on the blower motor housing on the rt side side under hood in the back. All 3 I have had did it at one time. But after tapping on housing they worked again and never had a problem since.

[dac99011]

Check out this thread by ixlr8: http://www.mercurymarauder.net/forums/showthread.php?t=48707

Thanks to ixlr8 for taking the time to document this!

Tomorrow, I will install the new BCM and let you know if it resolves my issues. Thanks!

[dac99011]

Replacing the BCM resolved my issue ....so far the blower motor works without issue. With only two bolts to take out and unplug a wire harness it took about 1 hour due to the lack of space but way better than paying someone else to fix it.

Thanks everyone!