[Kal-EL]

Oh yah, the coolant stays cold like a mofo in there. I had to wait 2 days once because the frost around the evap was so thick. Once you have enough fluid in the reservoir, recirculating a loop thru it helps thaw out faster.

I'm guessing your anit-freeze mix wasn't strong enough and froze up?

Also, make sure your feed line tube/copper/whatever reaches down to the bottom of the reservoir to pick up the coldest coolant and that your return flows over the fins of the evap if at all possible.