High Compressor Pressure Ratio

Excessive pressure ratio detected between compressor suction and discharge, risking mechanical integrity.

Possible causes

Extremely low suction pressure due to lack of refrigerant
High discharge pressure due to dirty condenser
Obstructed expansion valve (TXV)
Evaporator or condenser fan failure

Recommended actions

Verify high and low pressures with gauges
Clean condenser coil and check airflow
Check refrigerant charge
Inspect solenoid valve operation

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Other Thermo King codes

00No Alarms Exist 02Check Evaporator Coil Sensor (Zone)03Check (Control) Return Air Sensor (Zone)04Check (Control) Discharge Air Sensor (Zone)05Check Ambient Temp Sensor 06Check Coolant Temp Sensor

View all Thermo King codes

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