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(1) In summer, when the weather is hot, air conditioning system in automatic control mode, when the temperature is adjusted to a lower temperature value, the cold wind will not bring out instead of hot wind, and air conditioning system control go to trouble mode or protected mode, the cold / warm mixing stay in the position of hot wind.
(2) In winter, when the weather is cold, air conditioning system has no warm wind, t the cold / warm mixing is locked in the position of cold wind.
Possible Reasons:
The air conditioner cold / warm wind door shaft has manufacturing deviation and the software of air conditioning module has poor suitability, the specific reason as follows:
There are two reasons why it has hot wind when the weather is hot:
- possible reason one: the C8 pin of air conditioner control module shows signal there is no electronic currency, after the system set trouble codes, the controlling software become fault mode, and command cold / warm mixing wind door stay in the position where blow hot wind. The main reason is there is no electronic currency in the air conditioner circuit or the sliding resistor in the cold / warm wind door electronic motor; besides, cold / warm wind door shaft has hardware production deviation which may cause voltage higher than 4.98V in the process of adjusting and cause the trouble, but at this time, air conditioner system doesnThis Post: Buick Regal Automatic Air Conditioner Control Adjustment Trouble From ChinaOBD2 Official Blog
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