I think you are missing a key point to all of this. It's a pain in the ass to open up the actual motor unit of the opener. It's very simple for me to play with the tiny little transmitters.HiTech said:Look, this whole thread is getting carried away and darn silly if you ask me (2 pages of theoretical troubleshooting??). Let's top thinking about individual components going out of tune and instead locate the source of the problem logically. Copy this post of mine, take it out into your garage and get to work and don't report back here until you have some definitive results for us!
1. his vehicle transmitter's design does not provide for tweaking and poopeater states that both units operate the opener with the same results (basically disregard xmttrs. as the fault then)
2. receiver has far more components to affect proper operation so that should be suspect. First ensure that all connections terminals or wires to receiver are of good electrical integrity. Test thinngs once again to note any improvements. If not proceed to #3
3. Remove receiver module and inspect for poor solder connections, cracked foil traces, or electrically loose components. Test once again and if poor reception still exists, proceed to #4
4. swap out receiver to determine if that module is the culprit. If so, then case closed. If not proceed to #5
5. at this point if the system still isn't working properly, switch to raising and lowering the door manually!!
We need to realize that a garage door opener is an electro-mechanical device that uses a high-torque motor, mechanical linkage all interfaced to a circuit board. Mechanical vibrations over time can and have caused problems with the receiver control module. However most of the time it's been faulty xmtter packs since they get tossed about and are exposed to temperature extremes.
Thus, I'd much rather try adjusting the transmitters to work with my screwed up receiver than go straight to fiddling with the large, bulky, hard to reach, overhead motor unit.