Diagnosis
Broken wire or failed connection between the wall console and the opener head. The short wire run is often pinched or severed.
How to Fix It
Check the two low-voltage wires at the back of the wall console and at the opener terminal. Look for breaks. Often the problem is at the terminal block (screws marked 1 and 2) on the opener. Ensure wires are under the terminals and screws are tight.
If That Didn't Work
The wall button itself is faulty. It's a simple momentary switch. Use a multimeter to test for continuity when pressed. Replace the wall console if it's open circuit.
Heads Up
Do not use speaker wire or improper gauge. Use the provided 2-conductor bell wire or 22-gauge stranded thermostat wire. Solid core wire can break from vibration.