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Troubleshooting Guide for Overhead Door™ Legacy 850 Garage Door Opener

Troubleshooting Guide for Overhead Door™ Legacy 850 Garage Door Opener

Posted by Dave Willmes on 12th Feb 2021

Troubleshooting your Overhead Door™ Legacy® 850 garage door opener is easy! We have created guidelines and gathered all of the necessary information needed to troubleshoot your garage door opener at home.

Using this guide will help you identify common problems, solutions and recommended replacement parts for the Overhead Door™ Legacy® 850 garage door opener.

Model Numbers: 2029, 2029B, 2129, 2129B

Problem

Solution

Recommended Parts

Opener does not operate when wall control is pressed.
  • Turn Sure-Lock™ off.
  • Check power source.
    • Plug a lamp into outlet used for powerhead. If lamp works, power source is OK.
    • If not, check fuse or circuit breaker.
  • If power is OK:
    • Check connections at powerhead terminals and at wall console.
  • Check for reversed, broken or cut wires. Staples can cut insulation and short wires. Repair or replace.
Opener runs, but door does not move.
  • Make sure carriage is engaged with chain/belt/screw.
  • Check to make sure chain/belt is not broken or off its pulley.
Opener works from wall control, but NOT from remote.
  • Check all remotes.
  • Replace remote battery.
  • Program remotes to powerhead.
Remote has less than 25 feet operating range or no operation.
  • Relocate remote inside car and or point remote at garage door.
  • Replace battery.
  • Reposition door opener antenna.
  • Eliminate possible competing signals (radio, etc.).
  • LED bulbs may be interfering with remote signal.
Door starts down, then STOPS and goes back up. OR Safe-T-Beam® System malfunction.
  • If it’s a NEW installation, check Door Arm position.
  • If it’s a NEW installation, make sure ONLY the Safe-T-Beams® that came with this opener are installed.
  • Check if limits are properly set. Adjust limits as needed.
  • Check if Safe-T- Beam® red LED is flashing.
  • Check Safe-T-Beam® system for beam obstruction or misalignment of lenses.
  • Check garage door for binding.
  • If an operational problem exists, and opener will not close, the opener can be forced to close as follows: Press and hold the wall control button until door is completely closed.
  • Check for interference from adjacent Safe-T-Beam® units.
Door starts down, then STOPS before it is closed. OR Door will only open.
  • Check Safe-T- Beam® wire connection at powerhead and at STBs.
  • Check if limits are properly set. Adjust limits as needed.
  • Check CONTACT REVERSE.
  • Check garage door for binding.
  • Check closing “FORCE” control.
Door starts up, but STOPS before it is completely open.
  • Check if limits are properly set. Adjust limits as needed.
  • Be sure the door, opener and springs are in good repair, properly lubricated and balanced.
  • Check closing/opening “FORCE” control.
  • If you suspect a problem with the garage door hardware or springs, call Overhead Door and hire a local door service professional. NEVER try to repair door hardware or springs yourself.
Door will only run closed.
  • Turn Sure-Lock™ OFF.
  • Check if limits are properly set.
  • Check door balance, condition and door spring.
  • Check opening “FORCE” control.
  • If you suspect a problem with the garage door hardware or springs, call Overhead Door and hire a local door service professional. NEVER try to repair door hardware or springs yourself.
Door opener starts for no reason.
  • Button stuck on wall control or remote.
  • Was remote lost or stolen? Erase all remotes from powerhead memory and program new remotes.
Noisy operation.
  • Be sure all door fasteners are tight.
  • Be sure garage door is in good repair, properly lubricated and balanced.
  • Be sure opener is in good repair.
Door opener runs slow.
  • Check operating condition of door. Door may need professional repair/adjustment.

Troubleshooting Powerhead LEDs

Powerhead LED
 Possible Problem Solution Recommended Parts
Round LED Long LED
OFF OFF
  • No response from unit.
  • Check power supply.
  • Contact a trained professional.
ON/RED/
STEADY 		ON/RED/
STEADY
  • Limits not set properly.
  • Re-program limits.
ON/RED/

FLASHING

ON/RED/

FLASHING

  • Program error.
  • Component failure.
  • Unplug unit, wait 5 seconds, plug in.
ON/BLUE/
FLASHING 		OFF
  • Remote not programmed.
  • Program remote.
ON/PURPLE/
FLASHING 		OFF
  • Remote not programmed.
  • Program remote.
ON/RED/
FLASHING 		OFF
  • Safe-T-Beam® physical obstruction.
  • Safe-T-Beam® signal interference.
  • Remote obstruction, recheck unit.
  • Check alignment of Safe-T-Beam® pair and nearest other Safe-T-Beam® pair.
OFF ON/RED/
FLASHING
  • Door contact in UP or DOWN travel.
  • Door component failure detected.
  • Remove obstruction.
  • Check door spring, track, rollers, hinges and fixtures.
OFF ON/RED/
STEADY
  • Thermal cutout.
  • DO NOT unplug unit. Wait until LED clears before operating.
ON/PURPLE/
STEADY 		ON/PURPLE/
STEADY
  • Component error.
  • Contact a trained door system technician.
OFF ON/BLUE/
FLASHING
  • Door will not open.
  • Check Sure-Lock™ Sure-Lock™ should be OFF for normal operation.
ON/PURPLE/
FLASHING 		ON/PURPLE/
FLASHING
  • Radio receiver error.
  • Unplug the unit. Wait 5 seconds and plug the unit back in. If problems persist, contact a trained door system technician.

Diagnosing and solving problems on your own can save you time, stress and money. If you need help with ordering replacement parts for your Overhead Door™ Legacy® 850 garage door opener, contact OverheadDoorPartsOnline.com.One of our associates with assist you with ordering and will answer any questions you may have.

For additional information and instructions, you can visit the Overhead™ Door Legacy® 850 owner’s manual.