What is the reason for the yellow light on the Jaguar refrigerated air dryer?
2 Answers
The reason for the yellow light on the refrigerated air dryer: The dual-pressure switch has tripped due to either high-pressure protection or low-pressure protection. Inspection steps: First, check whether the pressure on the two refrigerant pressure gauges of the refrigerated air dryer is within the normal range when it is stopped. If the pressure is too high, it may be due to excessive refrigerant, and some should be released. If the pressure is too low, it may be due to insufficient refrigerant or a refrigerant leak, requiring leak detection, repair welding, and then re-evacuation and refrigerant recharge. Adjustment steps: If the pressure is normal, check whether the dual-pressure switch can be reset. The left button on the dual-pressure switch is the low-pressure protection reset button—pressing it can reset the switch. Adjust the bypass valve by tightening it inward to raise the low pressure to the normal range (0.38 MPa). The right button is the high-pressure protection reset button—pressing it can reset the switch. Check whether the fan can start normally, whether the condenser is clogged, whether heat dissipation is normal, and whether the ambient temperature or intake air temperature is too high.
As a Jaguar owner, I've also encountered the issue of the dryer yellow light coming on. This usually indicates an abnormality in the air conditioning dryer system, such as insufficient refrigerant or a leak, which leads to reduced cooling performance and makes summer driving quite uncomfortable. It could also be caused by a clogged filter or a failed dryer cylinder, resulting in moisture buildup that can corrode the pipes if not addressed promptly. I would first check for weakened airflow or unusual odors from the AC as a simple diagnostic step. Without professional tools, it's best to take the car directly to a repair shop. Technicians can use diagnostic tools to read fault codes and pinpoint the issue. Don't ignore this yellow light—it affects both driving comfort and vehicle longevity. I recommend regular maintenance of the AC system to prevent such problems.
