Thermo King Alarm 73: Hourmeter 6 Exceeds Set Time Limit
Alarm 73 is listed as 'Hourmeter 6 Exceeds Set Time Limit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Error Codes
Browse published fault-code records by brand, product and displayed code.
Each record starts with the source meaning, then separates applicability, owner-safe actions, operating uncertainty and qualified-service boundaries. A matching code string alone is not enough: confirm the brand, product, model and controller before acting.
Thermo King Alarm 74: Controller Reset to Defaults
Alarm 74 is listed as 'Controller Reset to Defaults' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 75: Controller RAM Failure
Alarm 75 is listed as 'Controller RAM Failure' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 76: Controller EPROM Failure
Alarm 76 is listed as 'Controller EPROM Failure' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 77: Controller EPROM Checksum Failure
Alarm 77 is listed as 'Controller EPROM Checksum Failure' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 78: Data Log EPROM Failure
Alarm 78 is listed as 'Data Log EPROM Failure' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 79: Internal Data Logger Overflow
Alarm 79 is listed as 'Internal Data Logger Overflow' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 80: Check Compressor Temp Sensor
Alarm 80 is listed as 'Check Compressor Temp Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 81: High Compressor Temp
Alarm 81 is listed as 'High Compressor Temp' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 82: High Compressor Temp Shutdown
Alarm 82 is listed as 'High Compressor Temp Shutdown' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 83: Low Engine Coolant Temp
Alarm 83 is listed as 'Low Engine Coolant Temp' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 84: Restart Null
Alarm 84 is listed as 'Restart Null' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 85: Forced Unit Operation
Alarm 85 is listed as 'Forced Unit Operation' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 86: Check Discharge Pressure Sensor
Alarm 86 is listed as 'Check Discharge Pressure Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 87: Check Suction Pressure Sensor
Alarm 87 is listed as 'Check Suction Pressure Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 89: Check Electronic Throttling Valve (ETV) Circuit
Alarm 89 is listed as 'Check Electronic Throttling Valve (ETV) Circuit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 90: Electric Overload
Alarm 90 is listed as 'Electric Overload' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 91: Check Electric Ready Input
Alarm 91 is listed as 'Check Electric Ready Input' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 92: Sensor Grades Not Set (Zone)
Alarm 92 is listed as 'Sensor Grades Not Set (Zone)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 93: Low Compressor Suction Pressure
Alarm 93 is listed as 'Low Compressor Suction Pressure' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 94: Check Loader #1 Circuit
Alarm 94 is listed as 'Check Loader #1 Circuit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 95: Check Loader #2 Circuit
Alarm 95 is listed as 'Check Loader #2 Circuit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 96: Low Fuel Level
Alarm 96 is listed as 'Low Fuel Level' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 97: Failed Remote Return Air Sensor (CR)
Alarm 97 is listed as 'Failed Remote Return Air Sensor (CR)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01