This happened on my car today. The temp flashed on and off a few times well I had the car in 'on' without the engine running. Once I started the car it was fine.

Was it trying to tell me something or was it just because the engine wasn't running?

92 SE'* don't have an ECC.

98 SE'* only do if they have the SLE package. Maybe you need to get a little more specific?

98 SE, sorry i always forget to include that

I thought the ECC on later years didn't do self diagnostic. So was it just some coincidence?

Not quite right.

The 94+ ECC'* do run diagnostics and report back issues.. however the only way to retrieve those codes is with a Tech2 or equivalent. The flashing ECC in our experience can be anything from a failed temp sensor to a bad actuator and even a low or high freon pressure and more. The system see'* a fault and is letting you know.

So it may be trying to tell me this problem? where it will only blow on the windshield?

http://www.bonnevilleclub.com/forum/...c.php?p=905377

Maybe that problem or 100 other problems. We can play a guessing game if you like, but until you try to repair based on your symptoms, your only other option is to go to a dealer and have the codes pulled (or another mechanic that has a Tech2).