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Thinks s/he gets paid by the post
- Joined
- Mar 11, 2018
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- 3,568
I have a 25 year old Craftsman (Chamberlain) garage door opener. In the past 10 years I have replaced the drive gear and one of the sensor units, specifically, the sending unit, or as it's called, the sending eye.
The problem is the garage door will not close. It opens just fine, but when attempting to close it, the door stops closing and reverses itself. The GDO overhead light blinks. If I hold the wall mounted GDO button I can get the door to close. This is a classic sign of a safety sensor failure.
When this happened before (about 9-10 years ago) I bought a set of safety sensors. I determined the faulty sensor was the sending unit, replaced it and the GDO had been working until last week.
I noticed that both safety sensors had their LED's lit up indicating they are getting voltage. I cleaned the lenses on both sensors and also checked for alignment of the sensors. Everything appears to be in working order. Since I had the new, unused receiving sensor unit that came in the set years ago I swapped that one out with the old receiving sensor unit. No joy, the door still won't close.
I went on eBay and found a replacement sending sensor unit, bought it and installed it today. The problem persists--door won't close. Both sensors are showing green lights, lenses are clean, sensors are in alignment.
I have adjusted the downward closing force setting but that didn't fix it. I've since put it back to its original setting.
Any ideas? By process of elimination I'm thinking faulty component on the logic board that's tricking the GDO into thinking a sensor isn't working. But I'm open to ideas.
The problem is the garage door will not close. It opens just fine, but when attempting to close it, the door stops closing and reverses itself. The GDO overhead light blinks. If I hold the wall mounted GDO button I can get the door to close. This is a classic sign of a safety sensor failure.
When this happened before (about 9-10 years ago) I bought a set of safety sensors. I determined the faulty sensor was the sending unit, replaced it and the GDO had been working until last week.
I noticed that both safety sensors had their LED's lit up indicating they are getting voltage. I cleaned the lenses on both sensors and also checked for alignment of the sensors. Everything appears to be in working order. Since I had the new, unused receiving sensor unit that came in the set years ago I swapped that one out with the old receiving sensor unit. No joy, the door still won't close.
I went on eBay and found a replacement sending sensor unit, bought it and installed it today. The problem persists--door won't close. Both sensors are showing green lights, lenses are clean, sensors are in alignment.
I have adjusted the downward closing force setting but that didn't fix it. I've since put it back to its original setting.
Any ideas? By process of elimination I'm thinking faulty component on the logic board that's tricking the GDO into thinking a sensor isn't working. But I'm open to ideas.