I have a Craftman keyless remote model 139.18775. Made in 1997. My problem is that when it is cold. (I live in Northern Ontario) It does not work. When it was newer no problem, in fact my other wireless keypad work great at -20 F) I took off the back and clean the key pad and glue the back on. Still the same and yes it has a new 9volt battery.
I 'm thinking maybe a resister inside is wearing out and does not like the cold. I know I can buy new for 59.99 Canadian
Any idea what I can do?

Time for a new one. Mine did the same thing. I use Genie now.