Lost Communication With Left Front Temperature Actuator

Where it lives

For U0659, start at the actuator the description names.

Check these first

• The bus drops the left front temperature actuator
• A failed actuator motor or solenoid
• A binding blend door on the left front actuator
• A broken actuator return spring
• A lost command signal to the left front temperature actuator

What to do next

1. Command the left front temperature actuator with a scan tool
2. Inspect the blend door linkage for binding
3. Check the actuator connector and wiring
4. Test the actuator motor
5. Replace the left front temperature actuator if it does not move
6. Clear the code and retest

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