Thermo King Truck/Trailer Refrigeration Unit Error Alarm 39: Causes & Fixes
Check Water Valve Circuit
Error Codes
Browse published troubleshooting notes by brand, product, and error code.
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 40: Causes & Fixes
Check High Speed Circuit
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 41: Causes & Fixes
Check Engine Coolant Temp
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 36: Causes & Fixes
Electric Motor Failed to Run
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 37: Causes & Fixes
Check Engine Coolant Level
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 38: Causes & Fixes
Electric Phase Reversed
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 33: Causes & Fixes
Check Engine RPM
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 34: Causes & Fixes
Check Modulation Circuit
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 35: Causes & Fixes
Check Run Relay Circuit
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 30: Causes & Fixes
Defrost Damper Stuck Closed (Zone)
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 31: Causes & Fixes
Check Oil Pressure Switch
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 32: Causes & Fixes
Refrigeration Capacity Low (Zone)
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 27: Causes & Fixes
Vapor Motor RPM High (CR)
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 28: Causes & Fixes
Pretrip or Self Check Abort
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 29: Causes & Fixes
Defrost Damper Circuit Check (Zone)
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 24: Causes & Fixes
Heating Cycle Fault (Zone)
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 25: Causes & Fixes
Alternator Check
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 26: Causes & Fixes
Check Refrigeration Capacity (Zone)
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 21: Causes & Fixes
Cooling Cycle Check (Zone)
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 22: Causes & Fixes
Heating Cycle Check (Zone)
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 23: Causes & Fixes
Cooling Cycle Fault (Zone)
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 18: Causes & Fixes
High Engine Coolant Temperature
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 19: Causes & Fixes
Low Engine Oil Pressure
Thermo King Truck/Trailer Refrigeration Unit Error Alarm 20: Causes & Fixes
Engine (Vapor Motor CR) Failed to Start