My blower fan runs all the time no matter what button I push...the 'off/on' button only shuts off the fan when i hold it in...when i let it go the fan starts up again. My fan speed buttons seem to work fine though. This is how the car was when i bought it.

I still think the problem has something to do with that flopping noise behind the dash somewhere...like a flap is cycling open and closed.

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'87 BMW 325 convertible (162k + miles)
'87 300E, 144k + miles (sold)
'93 Chevy Blazer (full size), 207K + miles
'89 Sea Ray 390EC, 2 x 454's, 1550 hours...
'85 AMF Sunfish

Olde Towne Portsmouth, VA