41A5640 Product Details
The LiftMaster 41A5640 limit switch assembly is a replacement limit switch kit for select residential garage door openers. It is used in the opener travel limit system to help identify open and close stopping points on compatible models.
Common Applications
This kit is commonly associated with LiftMaster ATS Series and select AC chain drive garage door openers manufactured after 2001. Use the model number and replacement parts diagram to confirm 041A5640 / 41A5640 before ordering.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Limit switch replacement kit |
| Part Number | 41A5640 / 041A5640 |
| Application | Open/close travel limit system service |
| Compatible Operator Type | LiftMaster ATS Series and select AC chain drive openers |
| Production Range | Commonly associated with units manufactured after 2001 |
| Notes | Travel issues may also involve gears, wiring, board problems, or door balance |
Also Known As / Related Part Numbers
- 041A5640
- 41A5640
- Limit switch kit
- Limit switch assembly
Technician Note
A limit switch problem should be diagnosed together with the drive system and door balance. If the opener is forcing the door, reversing unexpectedly, or ignoring travel settings, do not keep running it until the cause is found.
Before Ordering
- Confirm the opener is an ATS Series or compatible AC chain drive model.
- Match 041A5640 / 41A5640 in the parts diagram.
- Inspect nearby limit wiring and mounting points.
- Check door balance and travel setup after replacement.
- Do not bypass limit or safety controls during diagnosis.
Professional Advisory
Limit switch repairs affect where the door stops. If the door is binding, out of balance, or moving unpredictably, have a qualified garage door technician service the opener and door system.
Product Questions & Answers
What does the 41A5640 limit switch assembly do?
It is part of the opener travel limit system and helps compatible openers determine open and close stopping points.
What opener types use 041A5640?
It is commonly associated with LiftMaster ATS Series and select AC chain drive garage door openers manufactured after 2001.
Can this fix a door that stops in the wrong place?
It may help if the limit switch assembly is faulty, but incorrect travel settings, damaged gears, wiring issues, or door balance problems can create similar symptoms.
Is it safe to bypass a limit switch to test the opener?
No. Limit and safety controls should not be bypassed as a repair method.
What should be checked after replacing this kit?
Check open and close travel, safety reversal, door balance, and proper opener stopping points after service.
