B104D
Blend Door Control Circuit Low
B104D is an OBD-II diagnostic trouble code meaning: Blend Door Control Circuit Low. Common causes: open or short circuit in control circuit, damper motor malfunction. Estimated repair cost: $56–167.
Symptoms
- Inability to adjust the temperature in the cabin
- Constantly hot or cold air from the deflectors
- Clicking or unusual sounds from the damper area
Causes
- Open or short circuit in control circuit
- Damper motor malfunction
- Problems with the HVAC control unit
- Oxidation of contacts or damage to the wiring harness
How to Fix
- Check the integrity of the wiring and contacts in the control circuit
- Test the damper motor for malfunctions
- Check voltage and resistance in the circuit
- Replace the motor or HVAC control unit if necessary.
Related codes
FAQ
What does the B104D code mean?
B104D is an OBD-II diagnostic trouble code that indicates: Blend Door Control Circuit Low
What causes a B104D error code?
The most common causes of B104D include: Open or short circuit in control circuit; Damper motor malfunction; Problems with the HVAC control unit; Oxidation of contacts or damage to the wiring harness.
How do I fix a B104D diagnostic trouble code?
To fix B104D: Check the integrity of the wiring and contacts in the control circuit. Test the damper motor for malfunctions. Check voltage and resistance in the circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B104D?
Limited driving only, diagnose soon
How much does it cost to fix B104D?
The estimated repair cost for B104D is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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