have my 216 watt light plugged into a GE15079 wall timer, and all of a sudden it's starting to trip the GFCI breaker upon start up. Hasn't been happening for a year, just started. It used to be on an extension cord, and I figured that may be it, but now it's plugged directly into the wall and still tripping... Any electricians help here? Has the timer gone bad possibly?

