Educational case studyIntermediateEvidence-led
Vent temperature climbed at idle while high-side pressure rose and condenser airflow remained low.
Why this matters
The value of this case is the order of evidence and the verification step. The same symptom on another vehicle may have a different cause.
Evidence to capture first
- Ambient and vent temperature
- Pressure trend
- Fan request and actual fan operation
- Fan power, ground, and control
A disciplined path
- Reproduce at idle
- Compare command with response
- Load-test the failed control path
- Repair the circuit and repeat the same heat-load test
Decision point
Correct airflow restored normal pressure behavior; refrigerant quantity was not changed.
Source desk
Use current model-specific service information for specifications, connector locations, disabling procedures, and tightening values. The following public resources support the broader safety or system context used in this guide.

