3981 SPN Fault Code

Name:

Cab HVAC Mode Control Actuator

Description:

The cab HVAC mode control actuator selects which ducts convey conditioned air into the cabin of the vehicle. The actuator directs the air through the ducts [e.g. floor, defrost, dash, or a combination], based on the position of the operator’s control.

3981 spn fault code name is Cab HVAC Mode Control Actuator. If you don't take the time to look into 3981 spn fault when it arises, it can add up quickly. One small issue like 3981 can cause a larger component to become damaged without taking the time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road.

Note: The name and description of 3981 code represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. See also other spn codes.

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