92 Seville doing starnge things....

While I am driving ..all of a sudden my Temp (inside and out) and my fuel economy all look like this -- . and the blower is on front defog blowing like crazy .......I cant shut it off.
It just does it since I had my last oil change ..... I either have to drive and wait, or shut it off and then wait a few minutes . When it turn it back on its fine for a while.

My spedo and RMP as well as fuel gauge are Analog so thats ok ..its just all the digital stuff on the dash......

Im going to see if the "off and warmer" diagnostic will work on my car..... the only trouble codes I get is the famous "service ride control"

While I am driving ..all of a sudden my Temp (inside and out) and my fuel economy all look like this -- . and the blower is on front defog blowing like crazy .......I cant shut it off.
It just does it since I had my last oil change ..... I either have to drive and wait, or shut it off and then wait a few minutes . When it turn it back on its fine for a while.

My spedo and RMP as well as fuel gauge are Analog so thats ok ..its just all the digital stuff on the dash......

Im going to see if the "off and warmer" diagnostic will work on my car..... the only trouble codes I get is the famous "service ride control"

hey guy, I have the same problem with my STS, it did it once before and I replaced the blower control module, it's right up agaisnt the fire wall under the hood. You can get them rebuilt, if you haven't already looked into that, I would give it I shot. However, it's doing it again now and I replaced the module but it still is stuck on defog and only goes off once and awhile, if I fix it I will let you know how.