LiftMaster 24-115-1 Relay – 115V AC DPDT Replacement for Commercial Operators
LiftMaster 24-115-1 Relay – 115V AC DPDT Replacement for Commercial Operators
The LiftMaster 24-115-1 is a replacement relay for compatible commercial operator control circuits. It functions as an electrically operated switch, changing contact positions when its coil is energized.
Use this relay when the operator’s parts list or wiring diagram specifies 24-115-1. Correct selection requires matching the coil voltage, contact arrangement, and terminal layout.
PRODUCT DETAILS
• Manufacturer: LiftMaster
• Part number: 24-115-1
• Service replacement reference: K24-115-1
• Relay type: DPDT — double pole, double throw
• Legacy coil designation: 115V AC
• Current service-part designation: 120V, 10A
• Application: Compatible commercial operator control circuits
115V AND 120V DESIGNATIONS
Older LiftMaster documentation identifies 24-115-1 as a relay with a 115V coil. The K24-115-1 service replacement is cataloged as 120V, 10A.
Match the specified replacement part and equipment wiring diagram. The operator’s incoming supply voltage alone does not establish which relay it requires.
COMPATIBILITY
For use in LiftMaster operator configurations that specifically call for 24-115-1 or its approved K24-115-1 replacement.
Before ordering, verify:
• Exact operator model and manufacturing revision
• Existing relay part number
• Coil voltage
• DPDT contact arrangement
• Contact rating
• Terminal layout and mounting configuration
This is not a universal relay for every LiftMaster opener. Similar-looking 24V and 230V relays are not interchangeable with this part.
WHEN REPLACEMENT MAY BE NEEDED
A failed relay can cause intermittent switching or prevent the operator from responding correctly. These symptoms can also result from wiring faults, incorrect control voltage, failed switches, or other electrical problems.
Confirm the fault before replacing the relay and inspect the surrounding circuit for conditions that could damage the new component.
INSTALLATION NOTES
Have a qualified commercial door or gate technician perform diagnosis and replacement. Follow the equipment wiring diagram and preserve the specified terminal connections.
After installation, reinstall protective covers and test normal operation, travel limits, and all required safety functions.
SAFETY
Disconnect and lock out all power sources before servicing. Relay circuits may carry hazardous line voltage.
Secure the door or gate against unexpected movement. Never bypass interlocks, limits, overload protection, or entrapment-protection devices to make the operator run.
Details
Need Help With Compatibility?
Not sure if this is the correct part for your garage door, operator, gate system, or application? Contact Us before ordering — we’re happy to help.
Garage-DoorParts.com carries a large selection of residential and commercial parts, and many components can look similar while having important differences in dimensions, model numbers, voltage, mounting, or compatibility.
For the best assistance, please provide as much information as possible, including the manufacturer, model number, part number, door or operator type, dimensions, and clear photos of the existing part or equipment.
Our goal is to help you identify the correct product before you order and reduce the possibility of ordering an incompatible part.
Contact Us with your product questions and compatibility information, and we’ll do our best to point you in the right direction.
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We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.
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