Installation Guide
30 MM371W / MM372W Installation Instructions MM371W / MM372W Installation Instructions 31
For Your Records
Please record the product serial number (located on the right hand side of the control box), and the date and place of purchase in the 
spaces provided below. Refer to this information when calling Nortek Security and Control for service or assistance with your automatic 
gate operator. 
Serial Number ____________________________________________
Date of Purchase  _________________________________________  
Place of Purchase  ________________________________________  
Remember to keep all receipts for proof of purchase.
1.  First use the procedures found in the Maintenance & 
Troubleshooting Guide (see page 28). 
2.  For 24 hour 7 days a week trouble shooting and 
support online go to our TECH WIZARD site at 
www.mightymule.com
3.   If you are unable to solve the problem, call the 
Tech Service Department at (800) 543-1236, or 
(850) 575-4144. 
4.   If repair or replacement of your gate operator is necessary, 
the Service Department will assign a Return Authorization 
(RA) number.
5.  Include a copy of your receipt and securely pack the 
component(s) authorized for return to the factory. Write the 
RA number issued to you on the outside of the package in 
LARGE BOLD PRINT. Ship the package(s) freight prepaid to 
the address provided during the RA process. 
If your Mighty Mule Gate Opener is not operating properly, please follow the steps below:
NOTE: Products returned to Nortek Security and Control without a Return Goods Authorization (RGA) 
number in LARGE BOLD PRINT on the outside of the package WILL NOT be accepted. Items returned 
to Nortek Security and Control freight collect WILL NOT be accepted. Items returned without proof of 
purchase will not be repaired under warranty.
The Mighty Mule Technical Service Department is open 
Monday – Friday 8:00 A.M. – 7:00 P.M. (Eastern Time)
Fax (850) 575-8950 • Web site: www.mightymule.com
Telephone (800) 543-1236
For 24 hour 7 days a week trouble shooting and support 
online go to our TECH WIZARD site at...
www.mightymule.com
Repair Service










