LiftMaster not working? Call now and tell us what the door is doing.
✆ Call 845-535-1141LiftMaster openers tell you a good deal about what is wrong, if you know where to look. This page covers the signals specific to LiftMaster, the checks that are safe to try, and the repairs we carry out. For symptoms common to every brand, see garage door opener repair. To have it looked at, call 845-535-1141.
Reading the Flashing Arrows
On LiftMaster units with a yellow learn button, the UP and DOWN arrow buttons on the motor unit flash a two-part code when there is a fault: the up arrow flashes a number of times, then the down arrow. Count each and compare:
| Up flashes | Down flashes | What it points to | What to do |
|---|---|---|---|
| 1 | 1 | Safety sensors not connected, or a sensor wire is cut | Look along both sensor wires for a break or a pulled staple |
| 1 | 2 | Sensor wire shorted or reversed | Needs rewiring; call |
| 1 | 3 | Wall control or its wire shorted | Call |
| 1 | 4 | Sensors out of line or briefly blocked | Clear the doorway, clean and realign the sensors |
| 1 | 5 | Door moves a few inches and stops or reverses | Often a broken spring or a binding door; stop using it and call |
| 4 | 1 to 4 | The opener sensed too much force | The door is heavy or sticking. Do not raise the force setting; have the door checked |
| 4 | 6 | Sensors blocked for a moment | Clear and realign; if it keeps happening, the wiring is suspect |
Older LiftMaster units show faults with a blinking LED beside the learn button instead. Codes vary by model, so treat the table as a guide and check the manual for your unit, or tell us what you see when you call.
LiftMaster Sensor Lights
LiftMaster safety sensors use two colours. The sending sensor glows amber whenever it has power. The receiving sensor glows green only when it can see the sender. A green light that is off, dim or flickering means the two are not lined up or something is between them. Sunlight shining straight into the receiving sensor late in the day can cause the same fault; shading it or swapping the two sensors to opposite sides is the usual cure.
Safe Checks on a LiftMaster
- Lock button. If the wall control's light is blinking, the lock is on and remotes are disabled. Hold the LOCK button for a few seconds to turn it off.
- Remote compatibility. The colour of the learn button on the motor unit (yellow, purple, red-orange or green) shows which generation of remote it accepts. A new remote that will not program is usually the wrong generation.
- Beeping. On battery-backup models, a beep roughly every thirty seconds means the backup battery needs replacing.
- myQ app offline. The opener connects on 2.4 GHz Wi-Fi only. If the router was replaced or its password changed, the opener has to be connected again.
- Sensors and power, as on any opener: both lights steady, outlet live, GFCI reset.
Do not turn up the force or change the travel settings to get a struggling door to close. That hides a door fault and weakens the safety reverse.
Common LiftMaster Repairs
- Drive gear and sprocket. On chain and belt units with a traditional motor, a worn nylon gear lets the motor run while the chain stays still. White plastic shavings under the cover are the giveaway.
- Logic board. Lights or remotes behaving erratically after a storm or power surge.
- Safety sensors and wiring.
- Travel module and limits, where the door stops short or the opener loses its positions.
- Belt, chain and trolley replacement and tensioning.
- Wall-mount (jackshaft) units: cable tension monitor and door lock faults.
- Remotes, keypads, wall controls and myQ setup.
- Backup batteries.
Repair or Replace?
A LiftMaster with one failed part is usually worth repairing; parts for most models are easy to obtain. Replacement makes more sense for a unit with no safety sensors, one whose remotes are no longer made, or one with a burned-out motor. If you are replacing, see garage door opener installation for drive types and features.
Related Pages
- Garage door opener repair: symptoms for every brand
- Chamberlain opener repair • Genie opener repair
- Broken spring repair: the most common reason an opener strains
- Why won't my garage door close?
Frequently Asked Questions
Where and When We Work
We are open Sunday to Thursday 7 AM to 11 PM, and Friday 7 AM to 1 PM (closed Saturday). In Rockland County that includes Monsey, Spring Valley, Suffern, New City, Nanuet and the surrounding communities, and we also serve Orange, Westchester, Putnam, Dutchess, Ulster and Sullivan counties. Call 845-535-1141 to confirm availability for your address.