Thermo King Alarm 163: Emission Control Failure
Alarm 163 is listed as 'Emission Control Failure' 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 175: Check Electronic Expansion Valve (CR)
Alarm 175 is listed as 'Check Electronic Expansion Valve (CR)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 176: Check Evaporator Pressure Sensor (CR)
Alarm 176 is listed as 'Check Evaporator Pressure Sensor (CR)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 177: Check CO2 Tank Pressure Sensor (CR)
Alarm 177 is listed as 'Check CO2 Tank Pressure Sensor (CR)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 178: Low CO2 Fuel Level (CR)
Alarm 178 is listed as 'Low CO2 Fuel Level (CR)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 180: TriPac Compressor Alarm
Alarm 180 is listed as 'TriPac Compressor Alarm' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 188: Log DAS Microprocessor Fault (DAS)
Alarm 188 is listed as 'Log DAS Microprocessor Fault (DAS)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 203: Check Display Return Air Sensor (Zone)
Alarm 203 is listed as 'Check Display Return Air Sensor (Zone)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 204: Check Display Discharge Air Sensor (Zone)
Alarm 204 is listed as 'Check Display Discharge Air Sensor (Zone)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 216: Check DAS Digital Inputs (DAS)
Alarm 216 is listed as 'Check DAS Digital Inputs (DAS)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 233: REB Switching Off, Conservative to Full Null
Alarm 233 is listed as 'REB Switching Off, Conservative to Full Null' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 234: Check Relative Humidity Sensor Circuit
Alarm 234 is listed as 'Check Relative Humidity Sensor Circuit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 235: High Engine Coolant Temperature Check
Alarm 235 is listed as 'High Engine Coolant Temperature Check' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 250: DAS Clock Time Reset (DAS)
Alarm 250 is listed as 'DAS Clock Time Reset (DAS)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 251: Check Radio Expansion Board Configuration
Alarm 251 is listed as 'Check Radio Expansion Board Configuration' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 252: Check Auto Fresh Air Exchange Circuit
Alarm 252 is listed as 'Check Auto Fresh Air Exchange Circuit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 253: REB On Back Up Battery, Alarms Disabled
Alarm 253 is listed as 'REB On Back Up Battery, Alarms Disabled' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 254: Check Auxiliary Coolant Temp Sensor
Alarm 254 is listed as 'Check Auxiliary Coolant Temp Sensor' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 500: Check Host Evaporator Blower Low Speed
Alarm 500 is listed as 'Check Host Evaporator Blower Low Speed' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 501: Check Host Evaporator Blower High Speed
Alarm 501 is listed as 'Check Host Evaporator Blower High Speed' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 505: Check Roadside Condenser Fan Motor Speed Circuit
Alarm 505 is listed as 'Check Roadside Condenser Fan Motor Speed Circuit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 506: Check Curbside Condenser Fan Motor Speed Circuit
Alarm 506 is listed as 'Check Curbside Condenser Fan Motor Speed Circuit' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 507: Check Digital Scroll Output Circuit (Scroll Only)
Alarm 507 is listed as 'Check Digital Scroll Output Circuit (Scroll Only)' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01Thermo King Alarm 508: Speed Request Communication Error
Alarm 508 is listed as 'Speed Request Communication Error' for Thermo King Truck/Trailer Refrigeration Unit. Verify the exact model and controller before acting.
Source checked 2026-05-01