Liftmaster 175C279 Light Socket Replacement Garage Door Operators - Chamberlain
The LiftMaster 175C279 light socket kit is a replacement lamp socket assembly for select LiftMaster and Chamberlain residential garage door openers. The socket is the part that holds the light bulb and connects it to the opener light circuit. Over time, heat, vibration, bulb over-wattage, loose bulb contact, or age can damage the socket and cause intermittent lighting, no light output, flickering, or visible discoloration around the lamp area. This replacement is commonly tied to the 041C0279 / 41C279 family and is used on compatible opener end-panel assemblies that accept this socket style. Because many LiftMaster and Chamberlain openers use similar-looking lamp sockets, fitment should be verified by the opener model and parts diagram rather than by brand alone. Also inspect the lens, end panel, bulb type, and control board output if the light issue continues after socket replacement.
Compatible With
- Select LiftMaster residential garage door openers using the 041C0279 / 175C279 style light socket
- Select Chamberlain residential garage door openers using the same end-panel light socket assembly
- Common two-light unit references such as 1250, 1260, 1260LK, 1265, and 320WD when confirmed by parts diagram
- Applications calling for a 660W light socket on the opener end panel
- Replacement applications tied to 004A1344, 4A1344, 175B79, 175B88, or 175C729 related numbers
- Not a replacement for a logic board, light lens, LED module, or complete opener end panel unless specified by the parts breakdown
Also Known As / Related Part Numbers
- 175C279
- 041C0279
- 41C279
- 004A1344
- 04A1344
- 4A1344
- 175B79
- 175B88
- 175C729
- LiftMaster light socket kit
- Chamberlain light socket kit
Features & Specifications
| Manufacturer | LiftMaster / Chamberlain |
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| Product Type | Light socket replacement kit |
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| Part Number | 175C279 |
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| Common Service Number | 041C0279 |
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| Application | Garage door opener lamp socket replacement |
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| Compatible Operator Type | Select residential chain and belt drive garage door openers |
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| Socket Rating | Commonly listed as 660W socket on end panel |
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| Related Numbers | 41C279, 004A1344, 4A1344, 175B79, 175B88, 175C729 |
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| Notes | Verify by opener model, end panel style, and parts diagram |
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Technician Note
If the opener light still does not work after replacing the socket, the issue may be bulb type, wiring, the light relay or output on the logic board, or a wall-control light command setting depending on opener model.
Before Ordering Checklist
- Check the opener model number on the motor head.
- Compare the original socket and mounting style.
- Use the correct bulb type and wattage recommended for the opener.
- Inspect the lens and end panel for heat damage.
- Confirm whether the problem is the socket or the opener control output before replacing parts.
Professional Advisory
Disconnect power before servicing opener light components. If wiring is damaged or the opener shows signs of overheating, have the unit inspected by a qualified garage door technician.
Important Ordering Warnings
- This socket is not interchangeable with every LiftMaster or Chamberlain light assembly.
- Do not exceed the bulb wattage recommended by the opener manufacturer.
- LED bulb compatibility can vary on older openers; use bulbs suitable for garage door opener vibration and electronics.
Product Questions and Answers
What problem does the 175C279 light socket usually fix?
It is commonly used when the opener bulb will not light, flickers, has a loose connection, or the original socket is damaged.
Is 175C279 related to 041C0279?
Yes. 041C0279 is a commonly used service number for this style of LiftMaster / Chamberlain light socket kit.
Will this fit every LiftMaster garage door opener?
No. It fits select openers that use this socket style, so the opener model and parts diagram should be checked.
Is this the same as the light lens cover?
No. This is the bulb socket assembly. The lens cover is a separate plastic cover over the light area.
Can a bad logic board also cause the opener light not to work?
Yes. If the socket and bulb are good, the control board output or wiring may also need diagnosis.
