I got a similar problem. I live in quebec so now, when temperature goes under 0 degres celcius , my antenna has a problem to go down and up. I tried to lube it but it doesn't work. The motor makes a stange sound (like somes steps). I think it has some difficulties to move the antenna. I verified all the antenna from the outside to make shure that it's not a stupid problem. Everything seems to be ok.

When the temperature goes up to 0 degres celcius , everything is working fine.

Do you have a idea what can I try ???