I have a Craftsman Model 139.18054 Garage Door Opener and the light has been working since it was (professionally) installed 7 or so years ago and up to last Monday when I had a new garage door installed. The installer said they did not do any thing to the unit except attach new safety sensors and wires... Now the light does not go on when the door opens or closes up, nor when the sensor is tripped as it once did. The new sensors are working properly (but I notice I no longer get a "clicking" noise when walking past the sensors - they were replaced with a non stock sensor)... The only thing the installer says is that because this is an older unit this can happen... Is there an internal light switch or something that was inadvertently deactivated to cause the light not to work any more? Oh and for the record, I have changed the bulb with one that I made sure was working... Still nothing...

Thanks for your help in advance.

Peter