B103D
Blower Driver Overtemperature
B103D is an OBD-II diagnostic trouble code meaning: Blower Driver Overtemperature. Common causes: seized fan bearing, fan driver failure. Estimated repair cost: $56–167.
Symptoms
- Heater/air conditioner fan not working
- The fan only runs at one speed
- Burnt smell from vents
Causes
- Seized fan bearing
- Fan driver failure
- Problems in the wiring harness
- Poor contact in connectors
- Short circuit in the fan circuit
How to Fix
- Check the free rotation of the fan manually
- Diagnose the fan power circuit
- Check connectors and wiring harness
- Replace the fan driver if necessary
- Replace the fan motor if jammed
Related codes
FAQ
What does the B103D code mean?
B103D is an OBD-II diagnostic trouble code that indicates: Blower Driver Overtemperature
What causes a B103D error code?
The most common causes of B103D include: Seized fan bearing; Fan driver failure; Problems in the wiring harness; Poor contact in connectors.
How do I fix a B103D diagnostic trouble code?
To fix B103D: Check the free rotation of the fan manually. Diagnose the fan power circuit. Check connectors and wiring harness. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B103D?
Limited driving only, diagnose soon
How much does it cost to fix B103D?
The estimated repair cost for B103D is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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