OBD Guide
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B24C3

Blower Motor Feedback

B24C3 is an OBD-II diagnostic trouble code meaning: Blower Motor Feedback. Common causes: fan motor malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Heater fan does not turn on
  • The fan only runs at one speed
  • Unstable fan operation
  • No fan speed adjustment

Causes

  • Fan motor malfunction
  • Open or short circuit in wiring harness
  • Problems with connectors or contacts
  • Fan control module malfunction
  • Damaged fan resistor (if installed)

How to Fix

  1. Check the condition of the fan motor
  2. Inspect the wiring harness for damage
  3. Check connectors and contacts for oxidation and corrosion
  4. Test the feedback circuit with a multimeter
  5. If necessary, replace the electric motor or control module

Related codes

B24C0B24C1B24C2

FAQ

What does the B24C3 code mean?

B24C3 is an OBD-II diagnostic trouble code that indicates: Blower Motor Feedback

What causes a B24C3 error code?

The most common causes of B24C3 include: Fan motor malfunction; Open or short circuit in wiring harness; Problems with connectors or contacts; Fan control module malfunction.

How do I fix a B24C3 diagnostic trouble code?

To fix B24C3: Check the condition of the fan motor. Inspect the wiring harness for damage. Check connectors and contacts for oxidation and corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B24C3?

Limited driving only, diagnose soon

How much does it cost to fix B24C3?

The estimated repair cost for B24C3 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat