Thanks Ray, I've kept messing around with it (just restarting a few, make that several, times) and I think it's working now. The check light hasn't come on for over 20 minutes and the freezer is getting cold to the touch. Will check again in an hour to see if it's getting down to operating temperature. If it still isn't going right then, I'll pull the panel and see if I can find the fuses, etc. May have just been being onnery or I might not have been holding my crossed fingers in the right direction. If only everything in life could be simple.
Gus