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A thermal limiter, particularly in the context of GM vehicles’ low refrigerant protection system circuit, serves as a protective device to prevent compressor operation under specific conditions, primarily when low pressure is detected in the refrigerant system. Here’s a breakdown of its functionality:
- Protection Mechanism: The thermal limiter functions similar to a fuse-like device, designed to safeguard the low refrigerant protection system circuit from potential damage or malfunction.
- Low Refrigerant Pressure Detection: When the refrigerant pressure drops below a certain threshold, indicating insufficient refrigerant level or potential system leak, the thermal limiter is activated.
- Compressor Operation Interruption: Upon activation, the thermal limiter interrupts the operation of the compressor, preventing it from functioning under conditions where low refrigerant pressure could compromise its performance or cause damage.
- Prevention of Damage: By halting compressor operation during instances of low refrigerant pressure, the thermal limiter helps prevent potential issues such as compressor damage, inefficient cooling, or system malfunction.
- Integration with Low Refrigerant Protection System: The thermal limiter is an integral component of the low refrigerant protection system circuit in GM vehicles, working in conjunction with other system elements to ensure optimal performance and safety.
- Safety Considerations: Incorporating a thermal limiter enhances the safety and reliability of the vehicle’s air conditioning system by mitigating risks associated with low refrigerant pressure conditions.
- Diagnostic Indication: In some cases, the activation of the thermal limiter may trigger warning indicators or diagnostic codes in the vehicle’s onboard system, alerting the driver or service technician to potential refrigerant system issues.
In summary, a thermal limiter plays a crucial role in safeguarding the low refrigerant protection system circuit in GM vehicles by preventing compressor operation in situations of low refrigerant pressure, thereby promoting system integrity, efficiency, and safety.
See
- Low refrigerant protection system.