Garage door opener troubleshooting - do before you call for service

My wife reported a garage door failure, and demanded service while she drove away in my truck with her car 'trapped' in the garage.  Generally these types of service requests flow to me first, and it is hard to escape being not just the builder but also the husband. My main tactic on these issues is to at least attempt a few simple repairs and do a little google research prior to calling in for warranty support, or paid repair work.

In this instance, the chamberlain or lift master guides did not appear to be able to solve the issue, the fault code that was blinking at me was not something found in the troubleshooting guide in the manual (which I conveniently located).

Having exhausted my handyman options, I called the 1800 line, and was given a new strategy.  It involved basically pulling off the wall control unit, and shorting the two low voltage wires that power the wall unit, thus forcing a reboot of the opener.  This was actually successful and service call and associated cost has been avoided (for now - lets see if the fix lasts).

The warranty on these new garage openers is for 5 years on parts, labour for 1 year only.  Since hardly anything breaks in year 1, the warranty is fairly meaningless on appliances such as openers.

Here is a photo of how to do this work, it is very easy for any person to tackle, I was able to do it while on the phone with the 1800 technical support person.

Pull off your wall control unit by removing one screw and pulling it out of the hidden bracket at the back.

Pull off your wall control unit by removing one screw and pulling it out of the hidden bracket at the back.

Remove the wires at the back of the unit and touch the exposed copper part to the other wire, this shorts the circuit and acts as a jumper.  In this instance, the door that would not open immediately opens.  Put it back together and hope the problem is solved.

Remove the wires at the back of the unit and touch the exposed copper part to the other wire, this shorts the circuit and acts as a jumper.  In this instance, the door that would not open immediately opens.  Put it back together and hope the problem is solved.