8500 Manual
Page 2
... Light or Additional Light 28 Additional Programming for the Keyless Entry (Not Provided 28 MAINTENANCE 29 Care of Your Garage Door Opener.......... 29 TROUBLESHOOTING 30 Diagnostic Chart 30 Troubleshooting 31 Troubleshooting (Continued 32 REPAIR PARTS 33 Installation Parts 33 Garage Door Opener Assembly Parts..... 34 ACCESSORIES 35 REPAIR PARTS AND SERVICE 36 WARRANTY...
... Light or Additional Light 28 Additional Programming for the Keyless Entry (Not Provided 28 MAINTENANCE 29 Care of Your Garage Door Opener.......... 29 TROUBLESHOOTING 30 Diagnostic Chart 30 Troubleshooting 31 Troubleshooting (Continued 32 REPAIR PARTS 33 Installation Parts 33 Garage Door Opener Assembly Parts..... 34 ACCESSORIES 35 REPAIR PARTS AND SERVICE 36 WARRANTY...
8500 Manual
Page 30
... do not light, replace the safety reversing sensors. The diagnostic LED will flash a number of sensor. • Reattach sending eye to a 11 Flash. 30 Troubleshooting Diagnostic Chart Your garage door opener is programmed with jumper wire. If garage door opener activates, replace door control wires. SYMPTOM: Door stops and reverses...
... do not light, replace the safety reversing sensors. The diagnostic LED will flash a number of sensor. • Reattach sending eye to a 11 Flash. 30 Troubleshooting Diagnostic Chart Your garage door opener is programmed with jumper wire. If garage door opener activates, replace door control wires. SYMPTOM: Door stops and reverses...
8500 Manual
Page 31
... door opener lights don't blink: • Check cable tension monitor (see below. For an existing installation, see Installation Step 4). • Is something obstructing the door? Troubleshooting Troubleshooting The garage door opener doesn't operate from the garage floor area where the door closes. • Review Adjustment Step 2. Have it is not activated...
... door opener lights don't blink: • Check cable tension monitor (see below. For an existing installation, see Installation Step 4). • Is something obstructing the door? Troubleshooting Troubleshooting The garage door opener doesn't operate from the garage floor area where the door closes. • Review Adjustment Step 2. Have it is not activated...
8500 Manual
Page 32
... and closed manually. The garage door opener won 't work: • The garage door springs may be broken. Power lock makes noise when operating. • Call LiftMaster® dealer for this product. Disable the power door lock. Troubleshooting Troubleshooting (Continued) My door will not close the door manually.
... and closed manually. The garage door opener won 't work: • The garage door springs may be broken. Power lock makes noise when operating. • Call LiftMaster® dealer for this product. Disable the power door lock. Troubleshooting Troubleshooting (Continued) My door will not close the door manually.