Find Mighty Mule gate opener manuals and all the resources you need in our Help Center. We make it easy to install and troubleshoot your system.

Five beeps on a Mighty Mule gate opener typically signal a battery or wiring fault. Even with new batteries, check battery terminals for corrosion or loose connections.

Beeps upon power up: • This is normal self test when the unit is turned on. b. Continuous beep after power up: the alarm. • Unit has encountered two (2) obstructions without reaching either …

Dec 8, 2025 · Diagnose and stop your Mighty Mule gate beeping. Identify the exact error source (battery, sensor, power) and apply the systematic fix.

Nov 26, 2023 · When the Mighty Mule gate opener beeps continuously and the gate doesn’t open, it indicates a problem. Check for a power outage or low battery in the remote control.

What do you do if your Mighty Mule gate opener is beeping and you cannot replace the battery right away? A quick and easy fix will give you some time to get that new battery. Follow our …

What Are Common Mighty Mule Error Codes? Common Mighty Mule error codes include ‘beep’ patterns, which indicate issues like low battery (2 beeps), motor current error (3 beeps), or limit …

Jan 5, 2020 · If you hear four beeps with two seconds off repeatedly and the gate opener will not work, then you are experiencing a slave arm rev counter error. To troubleshoot, try these …

Below you will find the Mighty Mule gate opener troubleshooting tips for the models that belong to the 50, 500, UL325, and FM402 series. Mighty Mule 350 gate opener troubleshooting

How to reset to factory default and erase everything? To reset the Mighty Mule FM137 to factory default and erase everything, press and hold the reset button for more than two seconds. You …