Garage Doors – Repair Guide

Consulting the tables below will help you troubleshoot your garage door opener issues. Most garage door opener malfunctions are easy to understand and fix, although you do need reliable instructions. This is exactly what you’ll find in the Moore-o-Matic troubleshooting tables below.

Moore-O-Matic 700 garage door opener troubleshooting

SYMPTOM	POSSIBLE CAUSE	REMEDY
Starts without apparent cause (phantom operation)	Unwanted radio signal from unknown source Intermittent short in wall switch wiring Receiver decoding chip bad	Change digital code Remove cause of short Replace or repair receiver
Works from wall switch but not from radio control	Dead battery in transmitter Faulty radio receiver or transmitter	Replace battery Repair or replace radio set
Works from radio control but not from wall switch	Defective or "open” wall switch or wall switch wiring	Locate “open" and repair
Does not run, no sound when button is pushed	Faulty control board	Replace board
	Loose connector or broken wire	Repair wire
	Dead 115V power source (garage wiring)	Replace fuse or reset circuit breaker
Will not shut off at limit(s)	‘‘Open" in limit switch circuit- loose connection or broken wire Channel assembly out of phase with head	Tighten connector or repair break Remove head & synchronize with channel assembly
Won't reverse on obstruction	Defective circuit	Call to service
Lights won t come on	Faulty control board Bad splice connection	Replace board Re-splice
Lights won't go off	Faulty control board	Replace board
Operator runs sluggish even when disconnected from door	Faulty motor capacitor	Replace motor capacitor

Moore-o-matic X125 garage door opener troubleshooting

SYMPTOM	POSSIBLE CAUSE	REMEDY
Door will not close using the transmitter. Will only close with constant pressure to push button.	Photo Relay is out of alignment, there is a short in the yellow/black wires (can occur under staples or at screw terminals, or the wiring from the detector to the emitter is incorrect).	Recheck Photo Relay wiring and alignment.
Starts without apparent cause (Phantom operation)	Unwanted radio signal from unknown source Intermittent short in wall switch wiring Receiver decoding clip bad	Change digital code Remove cause of short Replace or repair receiver
Works from wall switch but not from radio control	Dead battery in transmitter Faulty radio receiver or transmitter	Replace battery Repair or replace radio set
Works from radio control but not from wall switch	Defective or "open" wall switch or wall switch wiring	Locate "open" and repair
Does not run, no sound when button is pushed	Faulty control board	Call to service
	Loose connector or broken wire
Will not shut off at limit(s)	"Open" in limit switch circuit— loose connection or broken wire Channel assembly out of phase with head
Won’t reverse on obstruction	Defective circuit
Lights won’t come on	Faulty control board Bad splice connection
Lights won't go off	Faulty control board
Operator runs sluggishly even if disconnected from door	Faulty motor capacitor

Moore-O-Matic Z133a Series garage door opener troubleshooting

Problem	Solution
Opener does not open from wallbutton or transmitter.	• Check electric power to operator. Check fuses or circuit breakers.
	• Are all door locks disabled?
	• Is beam properly installed and aligned? (Red LED should shine steady)
	• Check for dead short in wallbutton wiring.
Opener works from transmitter but not from wallbutton.	• Check wallbutton and wiring for correct wiring or short in wiring.
	• Make sure that staples do not penetrate wires.
Opener works from wallbutton but not from transmitter.	• If LED on transmitter does not light, change battery.
	• Check to see that transmitter and receiver are coded alike.
Door will go up, but not down.	• If door will go down when constant pressure is applied, check beam for alignment, obstruction or short in wiring.
Door opens and closes by itself. (Phantom operation)	• Change code in receiver and transmitter.
	• Intermittent short in wiring to pushbutton. Locate and repair or replace wiring.
Light bulbs burn out frequently.	• Use “Appliance” or “Garage Door Opener” bulb.