Chamberlain Garage Door Opener Error Codes

Chamberlain Logic 3 Garage Door Opener Error Codes

E1MAS triggered (cycles or months).None normal operation.1 blinkReset MAS.
E2No RPM input during opening or closing.The door only responds to constant pressure commands.2 blinksClutch is slipping, adjust clutch, or verify RPM sensor connection or replace RPM sensor. NOTE: To relearn the RPM sensor, move the door with a constant pressure command. The door will stop once relearned and normal operation will resume.
E3(MRT) Maximum Run Time timed out.The door stops before reaching the desired time.3 blinksFirst check Operator for any faults (i.e., Bad Limit switch), manually learn Max Run Timer
OR reset factory defaults
E4Obstruction sensed on closing.Operator will be in the OPEN position.4 blinksCleared by removing obstruction or realigning photo eyes and giving a close command.
E5Stuck key button pressed for greater than 2 minutes.Stuck key on 3-button station will not respond.5 blinksStuck key must be unstuck before it will be recognized as an input.
E6Rotary dial in invalid position for greater than 30 seconds.The door will not respond to the 3-button station or any other input.6 blinksRotary dial must be set to a valid position.
E7Failsafe Safety device faulted or not connected for greater than 2 minutes.Normal operation (5 second constant pressure override required to close).7 blinksCleared when safety device is cleared or connected.
E8Brownout Detected.Operator will run as long as enough power is present.8 blinks1. Check AC line for voltage.
2. Check transformer secondary for low voltage. To many accessories may be connected to the transformer.
E9Motor movement at invalid time.Operator will continue to function normally for 5 operations and then default to a constant pressure mode.Flash on start of movementCheck relays and the drive circuitry to insure that they are turning off. Operator must run correctly for two starts for the error to be cleared.

Chamberlain WD952KD Garage Door Opener Error Codes

Error CodeConditionCheck/RepairShop Parts
1 flashSensors are completely misaligned or sensor wires are brokenRealign the safety reversing sensors so that the LED on the receiving sensor glows steadily. Reconnect any loose wires between the safety reversing sensors and the logic board. Replace the safety reversing sensor wires if damaged. Safety reversing sensor wires
2 flashesSafety reversing sensor wires are shorted or the safety reversing sensor wires are reversed on the logic boardRepair or replace any damaged wires between the logic board and the safety reversing sensors. Connect the safety reversing sensor wires on the logic board following the guidelines in your owner's manual. Safety reversing sensor wires
3 flashesWall mounted door control wires are shortedRepair or replace any damaged wires between the logic board and the wall mounted door control.Wall mounted door control wires
4 flashesSafety reversing sensors are slightly misalignedRealign the safety reversing sensors so that the LED on the receiving sensor glows steadily.
5 flashesMotor overheatedThe motor can overheat if the door is opened and closed several times in a row. Unplug the garage door opener to reset the logic board. Allow the motor to cool for about 15 minutes before restoring power and using the garage door opener. Pull the emergency door release and check the up-and-down travel of the garage door for binding. Repair the garage door if it doesn’t travel smoothly. If it overheats after a single use and the garage door travel is smooth, replace the motor.Motor, Garage door components
6 flashesMotor circuit failureReplace the logic board.Logic board
Rapid flashingSignal is being received from a compatible remote transmitterThe logic board is receiving the signal from a compatible remote transmitter. Program the remote transmitter device to link to the logic board.