Key Takeaways
- Another possible cause of flashing lights on garage doors is misalignment.
- Garage door sensors normally hang about 4 to 6 inches above the ground level.
- Accumulation of dirt, vibrations, and improper mounting of sensors are the main causes of misalignment.
- Maintenance of sensors through cleaning reduces instances of detecting non-existent objects.
- The constant light emitted by sensors proves that garage door sensors are well-aligned.
- The flashing light emitted by sensors shows misalignment, poor electrical wiring, and malfunctions of sensors.
- It is wise to seek professional advice when it comes to electrical and opener problems.
- A new garage door sensor must be fitted in case of damaged lens and wiring issues.
The red blinking lights on the garage door sensors normally suggest misalignment or problems communicating between the sensors. Most times, aligning the garage door sensors would be the solution for you since your door will run smoothly afterwards.
The safety sensors mounted in the garage door help in making sure that accidents do not happen. In case any object blocks the motion of the garage door, they help in preventing the movement of the door in order to protect children, pets, cars, or valuable objects. Should the sensors not function well, the entire system of the garage door may not work at all.
Here are some steps on how to align your garage door sensors.
What Are Garage Door Sensors For?
The garage door sensors make sure there are no barriers blocking the way to prevent injuries to people and property.
Most garage door openers currently use photo eye sensors installed near the bottom of the tracks. The sender sends an invisible infrared beam, while the receiver receives it. If the beam is blocked, the opener stops or opens the door immediately.
As per the federal safety standard for automatic residential garage door operators, all residential garage door openers must be equipped with entrapment protection systems such as garage door sensors.
Additionally, you can seek expert advice on garage door safety sensors.
Importance of Safety Sensors for Garage Doors
Garage doors can be very heavy. Alignment of garage door safety sensors is critical since any misalignment will block the infrared signal.
Therefore, it can cause injury when safety devices malfunction.
Correctly installed sensors will ensure that:
- Injuries do not occur accidentally
- Pets and children are protected
- Vehicle damage is minimized
- Garage door opener safety is met
What Are the Implications of Blinking Indicator Lights on Sensors?
Flashing LED lights of garage door sensors imply that either there are misalignments, dirt in sensors, faulty wiring, or there might be some damage to the sensors.
Though LED light color differs from one sensor manufacturer to another, a flash in light is an indication that there is a problem in the line of communication.
Sensor Light Flashing Indicators
Green Light
-Power is received appropriately
Amber Light
-Transmitting sensor works fine
Red Light Flashing
-Misalignment/BARRIER present
No Light Seen
-Fault in power or connection
Flickering Light
-Loose connection/vibration issue
How Do You Align Garage Door Sensors?
In order to align garage door sensors, make sure to move the sensors around in such a way that their indicator lights do not flicker. Small sensor movements are relatively harmless for DIYers. But refrain from tinkering with garage door springs, cables, or any moving parts of the opener motor.
Step 1: Disconnect Power from the Garage Door Opener
Ensure that power is disconnected before handling the wiring and mounts of the sensors.
Step 2: Check the Sensors
- Dust and dirt accumulation
- Loose mounting brackets
- Tracks that may be bent
- Wires that may be damaged
- Any obstructions between the sensors
Step 3: Cleaning the Sensor Lenses
A dirty lens will reduce the intensity of the infrared signal and cause the lights to blink.
Materials required:
- A microfiber lens cleaning cloth
- Mild glass cleaning fluid if needed
- Soft wiping strokes
Step 4: Sensor Alignment
Unscrew the mounting wing nut to slightly loosen the sensor and adjust its position gently.
- Keep both sensors on the same horizontal plane
- Point them towards one another
- See constant lights
Step 5: Testing the Garage Door
Switch the power back on and test the garage door opener.
Put an obstacle such as a box when closing the door. So that the door should stop moving.
How to Align LiftMaster Garage Door Sensors
Positioning LiftMaster garage door sensors requires aligning the sensors such that the amber and green indicator lights remain on.
Amber indicator = sender sensor
Green indicator = receiver sensor
The receiving sensor is likely out of position when the green indicator flickers or goes off.
Take note that aligning LiftMaster garage door sensors follows the same process as other models. However, there are slight variations in the indicator lights.
Tips for Aligning LiftMaster Sensors
- Secure all brackets
- Avoid exposure to sun
- Check wiring for damages
- Make sure the sensors are aligned properly
Steps to Properly Align Chamberlain Garage Door Sensors
Chamberlain garage door sensors are perfectly aligned when both the LEDs stay solid.
Given that LiftMaster and Chamberlain are technologically identical, their alignment process is almost identical.
Chamberlain Sensor Repair
Causes for blinking lights could be:
- Vibrations on the tracks
- Lenses with dust
- Improper alignment brackets
- Low voltage wiring damage
In case the adjustment does not make the LED lights solid, replacement might be necessary.
TAKE NOTE: You can also see the comprehensive guide to “how to align your garage door sensors”.
Why Do Sensors Become Misaligned?
Garage door sensors may become misaligned due to vibration, impact, or even loose mountings.
In some cases, even normal usage will cause gradual misalignment of brackets over time.
Here are reasons why garage door sensors become misaligned:
Collision: Trash, bikes, equipment, and other vehicles might collide with sensors during use.
Loose Mounting Hardware: Vibrations during operation might result in loosening of mounting hardware.
Distortion of Track: This could affect alignment through shape or movement of the track.
Moisture and Dirt: Dust or moisture might interfere with signals between sensors.
Interference by Sunlight: In rare cases, older sensors are affected by sunlight exposure.
How to Clean Sensors Correctly?
Clean garage door sensors carefully by wiping them with a soft cloth and non-abrasive cleaner.
It is one of the simplest maintenance procedures that homeowners can do without risking their safety.
Tips for Safe Sensor Cleaning
Do’s:
- Use Microfiber towels
- Glass cleaner for household use
- Dry compressed air to remove dust
Don’t:
- Scrape the lens
- Direct cleaner spray on electronics
- Use strong chemicals
When to Replace Garage Door Sensors?
However, there are some cases where the sensor malfunction will not be resolved even with realignment and cleaning.
Such issues indicate that the inner parts of the sensors have already been worn out.
Emergency garage door repair will become imperative in the case of electrical problems since realignment cannot solve this issue.
Here are the indications for replacement:
Indicator light absent: indicates failed sensor/wiring
Sensor housing broken: damaged due to external factors
Blinking continuously despite realignment: indicates failed inner parts
Reverse direction of the door randomly: communication error between inner parts
Wiring frayed/burnt: electrical problems
When the garage door breaks down unexpectedly, seek professional assistance for emergency garage door repair.
Can You Fix Garage Door Sensors Yourself?
DIY cleaning and adjusting sensors are relatively easy tasks for homeowners, but it is not recommended to fix any advanced issues yourself.
The garage door has heavy mechanical components that work under great stress. Incorrect maintenance may result in injuries and damages.
Activities Homeowners Can Safely Do
- Clean sensors
- Remove obstacles
- Check sensors’ adjustment (Note: Do not repair, just check)
- Secure loose mounting
Activities That Should Be Done by Experts
- Wire fixing
- Motor testing
- Spring maintenance
- Cable replacement
- Track adjustment
What is the Life Expectancy of Garage Door Sensors?
Typically, garage door sensors may last between 10 to 15 years when well maintained.
Various environmental factors may greatly influence the longevity of sensors.
Factors that Lead to Reduced Longevity of Garage Door Sensors
- Exposure to moisture
- Temperature variations
- Dust formation
- Physical shocks
- Power surges
Final Checklist and Conclusion
Fixing the alignment of the garage door sensors is the fastest way to turn off blinking red lights and ensure proper functionality of your garage door opener. The problem may be solved quickly, and no repair work will be required most likely.
Garage Door Sensor Final Checklist
- Check for any debris obstructing sensors
- Ensure that both sensors are facing one another
- Tighten mounting brackets that have become loose
- Clean sensors’ lenses gently
- Test the reversal safety mechanism
- Check if indicator lights are stable
- Consider replacing faulty sensors
- Consult an expert if you notice an electrical problem
Frequently Asked Questions
How would you tell that your garage door sensors are out of alignment?
If you see your sensors blinking, it is a sign of possible misalignment. Your garage door could also fail to close properly, and the opener could go back up after starting the closing process. When your indicator lights are solid, your sensors are probably aligned properly.
What causes a garage door sensor light to blink red?
There could be a number of reasons behind the flashing red light of the garage door sensors such as improper installation, obstructions, dust, loose mountings, faulty wiring, and sunlight.
How do I align garage door sensors manually?
For manually aligning the garage door sensors, first loosen the mounts and then arrange them in such a way that there is no fluctuation in the indicator light. Then secure the mounts and test the garage door.
What is the frequency of cleaning of garage door sensors?
Garage door sensors need to be cleaned on a quarterly basis or in case dirt accumulates. Individuals with dirty garages, pets, and humid conditions will require frequent cleaning of the sensors.
How can sunlight affect garage door sensors?
Sunlight could have an effect on garage door sensors. Sunlight could affect how the infrared sensors operate.
When should one consider hiring a garage door specialist?
One should consult a garage door specialist in case the sensors do not align properly, wires appear to be damaged, and the garage door malfunctions. Issues regarding springs, wires, tracks, and opener motors will require consultation with a specialist.