C1779 Code - Blower Switch Failure
Quick Answer
The Engine Control Module (ECM) monitors the Blower Switch. Common causes include Faulty Blower Switch, Blower Switch harness is open or shorted, Blower Switch 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
- C1779 indicates Blower Switch Failure.
- Common causes
- Common causes include Faulty Blower Switch, Blower Switch harness is open or shorted, Blower Switch 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 C1779 Description
What are the Possible Causes of the DTC C1779?
- Faulty Blower Switch
- Blower Switch harness is open or shorted
- Blower Switch circuit poor electrical connection
How to Fix the DTC C1779?
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 C1779 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 C1779 Code
1. What does OBDII code C1779 mean?
C1779 indicates a failure in the blower switch circuit, commonly associated with the HVAC system in a vehicle.
2. What are the common symptoms of code C1779?
Symptoms include the blower fan not working, inconsistent fan speeds, or the HVAC system failing to respond to adjustments.
3. What causes the C1779 code to appear?
The code is typically caused by a faulty blower switch, damaged wiring, a bad blower motor resistor, or a malfunctioning HVAC control module.
4. How can I diagnose the C1779 code?
Start by inspecting the blower switch, checking for loose or damaged wiring, and testing the blower motor resistor for continuity.
5. Can I still drive my car with a C1779 code?
Yes, but HVAC system issues may affect comfort, especially in extreme weather, which could indirectly impact driver focus.
6. How do I fix the C1779 code?
Repairs may involve replacing the blower switch, repairing damaged wiring, or replacing the blower motor resistor or control module.
7. How much does it cost to repair a C1779 code?
Costs vary depending on the issue, but replacing a blower switch typically costs $50–$200, plus labor.
8. Can I clear the C1779 code without fixing the problem?
You can clear the code with an OBDII scanner, but it will return unless the underlying issue is resolved.
9. What tools do I need to fix a C1779 code?
Common tools include a multimeter for circuit testing, an OBDII scanner, and basic hand tools for component replacement.
10. Could a blown fuse cause the C1779 code?
Yes, a blown fuse in the HVAC circuit can cause the blower switch to fail and trigger the code. Always check fuses during diagnosis.
Discuss the causes and fixes for C1779 OBDII Code
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