AutoCodes – Generic – B10E8

B10E8 Code - Blower Motor Control Circuit

Quick Answer

A Blower Motor Power Module allows the microprocessor-based A/C Heater Control to calculate and provide infinitely variable blower motor speeds based upon either manual blower switch input or the ATC programming. Common causes include Faulty Blower Motor Power Module, Blower Motor Power Module harness is open or shorted, Blower Motor Power Module circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B10E8 indicates Blower Motor Control Circuit.
Common causes: Common causes include Faulty Blower Motor Power Module, Blower Motor Power Module harness is open or shorted, Blower Motor Power Module circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,351

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B10E8 Description

A Blower Motor Power Module allows the microprocessor-based A/C Heater Control to calculate and provide infinitely variable blower motor speeds based upon either manual blower switch input or the ATC programming. The ATC blower motor control system uses a Pulse Width Modulated (PWM) circuit strategy. PWM voltage is applied to a comparator circuit which compares the PWM signal voltage to the blower motor feedback voltage. The resulting output drives the power module circuitry, which provides a linear output voltage to change or maintain the desired blower speed. If the A/C Heater Control detects a short to ground on the Blower Motor Control circuit. If a valid voltage is detected the DTC will change from active to stored and stay in the controllers memory for 100 consecutive ignition cycles.

OBDII Code B10E8 - Blower Motor Control Circuit - AutoCodes.com — B10E8 Code - Blower Motor Control Circuit

What does this mean?

What are the Possible Causes of the DTC B10E8?

Faulty Blower Motor Power Module
Blower Motor Power Module harness is open or shorted
Blower Motor Power Module circuit poor electrical connection
Faulty A/C Heater Control

How to Fix the DTC B10E8?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

B10E8-11-BLOWER MOTOR CONTROL - CIRCUIT SHORT TO GROUND
B10E8-12-BLOWER MOTOR CONTROL - CIRCUIT SHORT TO BATTERY
B10E8-16-BLOWER MOTOR CONTROL - CIRCUIT VOLTAGE BELOW THRESHOLD
B10E8-17-BLOWER MOTOR CONTROL - CIRCUIT VOLTAGE ABOVE THRESHOLD

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B10E8 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B10E8 code?

Need more information on how to fix the B10E8 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B10E8 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B10E8 Chrysler — Blower Motor Control Circuit
B10E8 Dodge — Blower Motor Control Circuit
B10E8 Jeep — Blower Motor Control Circuit
B10E8 RAM — Blower Motor Control Circuit

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B10E8 Code

1. What does the OBDII code B10E8 mean?

The B10E8 code indicates an issue with the blower motor control circuit, often related to the HVAC system in a vehicle.

2. What are the common symptoms of the B10E8 code?

Symptoms include the blower motor not functioning, inconsistent fan speeds, or the HVAC system failing to provide airflow.

3. What causes the B10E8 code to appear?

Common causes include a faulty blower motor, a damaged blower motor resistor, wiring issues, or a malfunctioning HVAC control module.

4. How can I diagnose the B10E8 code?

Start by inspecting the blower motor, resistor, and related wiring for damage or corrosion. Use a multimeter to check for proper voltage and continuity in the circuit.

5. Can I still drive my vehicle with the B10E8 code?

Yes, you can drive the vehicle, but the HVAC system may not function properly, which could affect comfort or visibility in extreme weather conditions.

6. How do I fix the B10E8 code?

Repairs may include replacing the blower motor, fixing or replacing damaged wiring, swapping out a faulty blower motor resistor, or reprogramming the HVAC control module.

7. How much does it cost to fix the B10E8 code?

The cost varies depending on the specific issue, but replacing a blower motor or resistor typically costs between $100 and $300, including parts and labor.

8. Can a blown fuse cause the B10E8 code?

Yes, a blown fuse in the blower motor circuit can cause this code. Check and replace the fuse if necessary.

9. How do I reset the B10E8 code after repairs?

Use an OBDII scanner to clear the code. If the issue is resolved, the code should not return.

10. Will ignoring the B10E8 code cause further damage?

Ignoring the code may not cause immediate damage, but prolonged issues with the blower motor circuit can lead to HVAC system failures or reduced comfort and safety.