I too have a Craftsman garage door opener. Mine is approx. 10 years old but it was never out of the box. I am having a problem with the receiver sensor. I've checked all the wiring and all is good. I even checked for voltage at the end of the wire at the receiver and it is good.I've tried adjusting the aim of both sensors and nothing works. I also tried my TV remote control and that doesn't work. I finally concluded I should purchase a new set of sensors but after hearing the older sensors had a problem when the temperature drops, I heard that a newer model was available that corrected that problem. Can I use the newer model with my older unit? My opener model is #139.53627SRT 1/2 HP and the sensor part number is #41A4373. Please advise.