Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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Could be a bad control. Try disconnecting the leads from it then touch the bare ends of the wires together (briefly). If the door opens then replace the control. If it doesn't then you could have a wiring problem. Go to the terminals where the leads connect to the opener. Jump those 2 terminals (briefly) with a piece of wire or a paper clip. If the door opens then you need to replace the wiring to the control.