Owner’s manual
Error Codes
How do I know what model Craftsman garage door opener I have?
Your Craftsman garage door opener model number is printed on the opener’s ID label on the motor unit (the power head mounted to the ceiling). For your unit, the model is 13953675SRT2; match that exact number when looking up parts, remotes, and programming steps in the owner's manual.
Check these common label locations on the motor unit:
- Behind the light lens cover (near the bulbs)
- Under the front cover where the control buttons are
- On the side panel near the wiring terminals
- On the back panel near the hanging brackets
- Near the learn button area (often labeled SRT/learn on this style)
Record the information exactly as shown on the label.
- Model number (example: 13953675SRT2)
- Serial number (helps identify production run details)
- Motor type and drive type (chain drive vs belt drive, if listed)
- Remote/control type (many units use SECURITY+ remotes)
| Item on label | What it helps with | Example |
|---|---|---|
| Model number | Correct parts list and manual | 13953675SRT2 |
| Serial number | Matching compatible accessories | Varies |
| Remote system | Remote and keypad compatibility | SECURITY+ |
Craftsman openers that look similar can use different remotes, keyless entries, and programming steps. Using the exact model number helps you avoid buying the wrong remote or following the wrong learn-button procedure.
If you are troubleshooting operation or flashing lights, use the model number to follow the diagnostic steps and programming instructions, then reference Craftsman error codes for symptom-based guidance.
Last updated: February 2026
Is it cheaper to repair or replace a garage door opener?
Repairing a Craftsman garage door opener like model 13953675SRT2 is cheaper when the problem is simple (photo eyes out of alignment, force/limit settings, worn light bulbs, loose wiring). Replacing the opener is the better value when the unit is older, has repeated failures, or needs major internal drive or motor work.
We use these practical rules of thumb for most residential openers:
- Repair when the door is binding, sensors are misaligned, or settings need adjustment
- Repair when the opener runs but the door reverses or will not close consistently
- Replace when the opener has frequent breakdowns or multiple expensive parts are failing
- Replace when you want modern features (quieter drive, better lighting, smart control, battery backup)
- Replace when the opener struggles because the door system is worn and you are also paying for major door hardware service
Costs vary by region and door size, but this is a useful way to think about it:
| Option | Typical scope | Typical cost range | Best when |
|---|---|---|---|
| Repair | Sensors, wall control, wiring, adjustments | $100 to $300 | One clear issue, opener otherwise reliable |
| Major repair | Gear kit, motor, logic board | $250 to $500+ | Opener is newer and in great condition |
| Replace opener | New opener plus installation | $300 to $1,000+ | Older unit, repeated failures, feature upgrade |
Many “replace it” symptoms are actually setup or door-balance problems:
- Test door balance: disconnect the trolley and move the door by hand; a properly balanced door should stay at mid-travel
- Do not increase force to compensate; excessive force can create safety issues
- Inspect safety reversing sensors: clear obstructions and align the receiving eye
- Re-run force and travel limit adjustments and repeat the safety reverse test after changes
- Replace bulbs correctly: use standard neck garage door opener bulbs (75 watts max)
For the model-specific adjustment locations and safety reverse testing steps, use the owner's manual.
A garage door opener that is compensating for a heavy or unbalanced door can seem “bad” even when it is not. Fixing door balance and sensor alignment first often restores safe, reliable operation and prevents unnecessary parts replacement.
Last updated: February 2026
Where can I buy Craftsman garage door opener parts?
You can buy replacement parts for your Craftsman garage door opener model 13953675SRT2 through our parts listings and diagrams, using the model number to match the correct components. For part identification and ordering details, we recommend checking the owner's manual.
Use the model number and the part description together so you get an exact match.
- Find the model number label under the light lens on the front end panel of the opener
- Use the parts diagram to identify the exact part name and location
- Match by part description (example: safety reversing sensor, limit switch assembly, capacitor)
- Confirm compatibility before ordering, especially for motor and gear assemblies
- Keep your opener’s accessory type in mind (remote controls, keyless entry, rail extensions)
Your 13953675SRT2 manual lists several common components and accessories that owners often replace.
| Category | Examples you may see listed | When it’s commonly needed |
|---|---|---|
| Safety and control | Safety reversing sensors, sensor brackets, bell wire | Door will not close, lights blink, sensor alignment issues |
| Drive and travel | Trolley, chain and cable, pulley bracket | Door moves unevenly, trolley slips, noisy operation |
| Motor and internal | Capacitor, limit switch assembly, RPM sensor, helical gear | Motor hums, opener stops mid-travel, erratic limits |
| Convenience | Remote controls, keyless entry, outdoor key switch | Lost remote, adding access points |
Garage door opener parts are model-specific. Using the correct Craftsman 13953675SRT2 part helps restore safe operation, especially for safety reversing sensors and travel limit components.
If you are diagnosing a problem first, use Craftsman error codes to match symptoms to likely failed parts.
Last updated: February 2026
