Garage door goes down but will come back up. What can cause this problem?

If you have a door sensor for the garage door, you may have something blocking it on the front end of the garage. Clear any obstructions blocking the sensor eyes. Otherwise, run the garage door while observing the limit switch assembly. You will notice that the two outer white screws can adjust the range of the garage door. If you run the garage door and observe these screws from the inside of the garage, you should be able to see what is causing the garage to come back up. If both of these solutions fail, look at your garage door manual for troubleshooting the door. There may be another adjustment that you need to try.

What are the color wires go what colors go were

there are directions on how to connect the wires in the book that comes with it and the white is the ground with the red being the HOT. there should be something on the inside of the cover with instructions.

Door works perfectly w/ this part. Except lights on the garage door opener won't shut off any more. Is this simply coincidental? Any ideas to fix?

I would make sure your ground wires are all connected to either the new part and/or the circuit board still. Make sure the leads have no corrosion too. Other than that, it may be coincidental.

I have a 1993 model 41a4252-7 opener. Will this part fit?

This limiting switch is pretty basic. If you have a Craftsman and it matches what you have now it should fit.

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LIFTMASTER Garage Door Openers 41D3452 Limit Switch Assembly

Product ID: 25746685

Details

Actuator Type
Plunger
Brand
Liftmaster
Circuit Type
3-way
Connector Type
Crimp
Contact Type
Physical
Material
Plastic

🔧Easy plug-and-play installation

🔩Durable stainless steel contacts

⚙️Universal chain drive compatibility

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€ 58.09

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Description

⚡ Upgrade your garage game with LiftMaster’s ultimate limit switch!

BUILT TO LAST - Stainless steel physical contacts ensure reliable, long-term performance under daily garage door stress.
PRECISION CONTROL - 3-way circuit design guarantees smooth automatic operation, keeping your garage door perfectly timed.
PRO LEVEL RELIABILITY - Trusted by pros and DIYers alike to fix stripped gears and broken contacts without costly service calls.
SEAMLESS COMPATIBILITY - Works flawlessly with 50+ LiftMaster & major brand chain drive models from 1986 to today.
EFFORTLESS INSTALLATION - Swap out your old limit switch in minutes—no tech degree required, just click, slide, and reconnect.

The LiftMaster 41D3452 Limit Switch Assembly is a robust, surface-mount replacement part designed for chain drive garage door openers from LiftMaster and other leading brands dating back to 1986. Featuring durable stainless steel contacts and a 3-way circuit, it ensures precise automatic door control. Easy to install and compatible with over 50 models, this switch is a must-have for anyone looking to avoid costly repairs and keep their garage door running smoothly.

Specifications

ASIN	B000FPVOVY
Actuator Type	Plunger
Best Sellers Rank	#190,197 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #770 in Garage Door Keypads & Remotes
Brand Name	Liftmaster
Circuit Type	3-way
Color	Black, White
Connectivity Protocol	Wi-Fi
Connector Type	Crimp
Contact Material	Stainless Steel
Contact Type	Physical
Control Method	Remote
Controller Type	Push Button" or "Remote Control
Customer Reviews	4.7 4.7 out of 5 stars (509)
International Protection Rating	IP00
Item Weight	16 ounces
Manufacturer	Chamberlain
Material Type	Plastic
Model	41D3452
Mounting Type	Surface Mount
Number of Items	1
Number of Positions	2
Operation Mode	automatic
Switch Type	Limit Switch
Terminal	Screw
UPC	753182403311 640213239677
Unit Count	1.0 Count
Wattage	370 watts

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