I’ve wired the LFM-20 into the liftmaster garage. I’ve connected it to my SmartThings hub V2 and changed it to virtual momentary contact switch. The Liftmaster opener is giving me an error code of arrow up once, arrow down 3 times. The two blue wires are constantly hot and turn off momentarily when hitting the button on the phone to operate the switch. I do hear the switch operate when operating the button on the app. Does anyone have any recommendations??
Below is liftmaster’s explanation of the error code. My wall buttons are still working normally.
Up Arrow Flash: 1
Down Arrow Flash: 3
Symptom: The door control will not function.
Solution: The wires for the door control are shorted or the door control is faulty. Inspect door control wires at all staple points and connection points and replace wire or correct as needed.