B2956 Mercury Code - Blend Door Close Circuit Failure Or Short
Quick Answer
Under normal operation, to rotate the mode door actuator clockwise, the Electric Manual Temperature Control (EMTC) Module or Electronic Automatic Temperature Control (EATC) Module supplies voltage to the Blend, Floor/Defrost and Panel mode door actuator motors through the door actuator feed B circuits, and supplies ground through the door actuator feed A circuits. Common causes include Faulty Blend Door Actuator Motor, Blend Door Actuator Motor harness is open or shorted, Blend Door Actuator Motor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B2956 Mercury indicates Blend Door Close Circuit Failure Or Short.
- Common causes
- Common causes include Faulty Blend Door Actuator Motor, Blend Door Actuator Motor harness is open or shorted, Blend Door Actuator Motor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B2956 Mercury Description
The mode door actuator feedback resistors are supplied a ground from the EMTC module or EATC module by the mode door actuator return circuits and a 5-volt reference voltage on the mode door actuator reference circuits. The EMTC module or EATC module reads the voltage on the mode door actuator feedback circuits to determine the mode door actuator position by the position of the actuator feedback resistor wiper arm.
What are the Possible Causes of the DTC B2956 Mercury?
- Faulty Blend Door Actuator Motor
- Blend Door Actuator Motor harness is open or shorted
- Blend Door Actuator Motor circuit poor electrical connection
- Faulty Electric Manual Temperature Control (EMTC) Module or Electronic Automatic Temperature Control (EATC) Module
How to Fix the DTC B2956 Mercury?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B2956 Mercury 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.
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Frequently Asked Questions about B2956 Mercury Code
1. What does the OBDII code B2956 mean for a Mercury vehicle?
B2956 indicates a problem with the blend door close circuit, specifically a failure or short, which affects the vehicle's climate control system.
2. What are the common symptoms of code B2956 in a Mercury?
Symptoms may include inconsistent cabin temperature, inability to control airflow direction, or unusual noises from the HVAC system.
3. What causes a B2956 code to appear in a Mercury?
This code can be caused by a faulty blend door actuator, damaged wiring, a short circuit, or a malfunctioning HVAC control module.
4. Can I still drive my Mercury with a B2956 code?
Yes, the vehicle is still drivable, but the HVAC system may not function properly, leading to discomfort in extreme weather conditions.
5. How do you diagnose the B2956 code in a Mercury?
Diagnosis involves scanning the vehicle's computer, inspecting the blend door actuator and its wiring, and testing for continuity or short circuits in the blend door circuit.
6. How do you fix a B2956 code in a Mercury?
Common fixes include replacing the faulty blend door actuator, repairing damaged wiring, or resetting the HVAC system after repairs.
7. How much does it cost to repair a B2956 code in a Mercury?
The cost can range from $150 to $500, depending on whether the actuator or wiring needs repair, and whether labor is performed by a technician.
8. Can a B2956 code be caused by a blown fuse?
Yes, a blown HVAC system fuse can interrupt power to the blend door actuator, potentially triggering the B2956 code.
9. How can I prevent a B2956 code from reoccurring in my Mercury?
Regular maintenance of the HVAC system, ensuring proper wiring connections, and addressing any unusual noises promptly can help prevent recurrence.
10. What tools are needed to repair the B2956 code in a Mercury?
You may need an OBDII scanner, a multimeter for electrical testing, and basic hand tools to access and replace the blend door actuator.
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