Craftsman 139.3043 owner manual Diagnosticchart, Flash 2 Flashes, Flash 3 Flashes, Flash 4 Flashes

TROUBLESHOOTING

DIAGNOSTICCHART

Your garagedoor opener is programmed with self-diagnostic capabilities. The UP and DOWNarrows on the garage door openerflash the diagnostic codes.

DIAGNOSTIC UPDOWN

CODE ARROW ARROW

1-11 FLASH 1 FLASH

SYMPTOM	CAUSE	RESOLUTION
The garagedoor	Safety sensors are	Inspect sensor wires for a disconnected or
opener will not	notinstalled,	cut wire(s). If the sending sensor with the
close and the	connected,or wires	amber LEDis NOTlit, check the wire and
light(s) willflash	may be cut	connections for that sensor. If sending
		sensor LED is lit, check the wire
		connections leading to the receiving
		sensor (green LED). Reattachwire or
		replacewire (22 gaugewire) as needed. If
		pre-wired home, check the splices. See
		page24 for installation. Closethe garage
		door using the remote control or the door
		control.

1-21 FLASH 2 FLASHES

The garagedoor	Safety sensor wire
opener will not	shorted or reversed
close and the
light(s) willflash

Inspect sensor wire for incorrect wiring or a pinched wire. If the sending sensor (amber LED) is not lit, check the wire leadingto and from that sensor. Check staple points. If sending sensor LED is lit, check the wire leadingto the receiving sensor (green LED). Reattachwire or replacewire (22 gaugewire) as needed. If pre-wired home, check the splices. See page24 for installation. Closethe garage door using the remote control or the door control.

1-31 FLASH 3 FLASHES

Wall-mounted door	The wires for the	Inspect door control wires for a short
control will not	door control are	(staple in wire), replacewire (22 gauge
function	shorted or the door	wire) as needed.After installing new door
	control is faulty	control wires, if door control still does not
		operate garagedoor opener, replacethe
		door control.

1-41 FLASH 4 FLASHES

The garagedoor	Misaligned or
opener will not	obstructed safe_
close the doorand	sensors
thelight(s)flash

Realignthe receiving sensor (green LED) by ensuring the LED is steady and not flickering. A flicker of the safety sensor LEDindicates a misalignment. Make sure nothing is hanging or mounted on the door interrupting the sensor'spath while

closing. Closethe garage door using the remote control or the door control.

The garagedoor	Bad logic board	Replacethe logic board.
opener clicks but no
movement

1-5	1 FLASH	5 FLASHES	The opener runs	Communication
			approximately 6-8"	error to travel
			and stops and/or	module
			reverses

Disconnect all power, remove cover, and locatethe travel module. Ensurethe wires

for travel module are connected, if wires

areconnected, then replacethe travel module.

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