Coolant light blinking...

[2003S]

OK, I finally thawed my Boxcicle that's been parked on the street for about 5 or 6 weeks frozen here in Chiberia. I had to jump start her, but it fired right up, and I took her for a 30 minute drive to break the rust off the rotors, and just generally warm it up a bit.

Immediately after starting, the dash showed "low coolant", and the temp gauge light was blinking, which continued the whole time. However, the coolant level looks good, and the temp never deviated from the normal "middle of the 8" position on the 180.

Any ideas? I'll run it into my guy to have a look, but just wanted to seek the wisdom of the clan...

Otherwise, she's a champ, engine ran great, ride is fine...

Thanks