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Carrier 58CU0B error codes

Every checked code for the Carrier 58CU0B range, with what it means and whether you can fix it yourself.

Error codes

Code Meaning What you can do
10.1 Line voltage polarity reversed Call a pro
10.2 Refrigerant leak detected, dissipation active Call a pro
13.1 Limit circuit lockout, a limit or rollout switch stayed open Safe checks first, then a pro
14.1 Ignition lockout after repeated failed lighting attempts Safe checks first, then a pro
14.3 Lockout after 7 flame losses in one heat request Safe checks first, then a pro
14.4 Lockout after repeated pressure switch openings Safe checks first, then a pro
15.1 Blower lockout, no blower speed signal Call a pro
15.2 Blower lockout, blower never reached 500 rpm Call a pro
17.1 Lost communication with the Bluetooth module Call a pro
21.1 24 volts sensed at the gas valve when there should be none Safe checks first, then a pro
22.1 Flame proved while the gas valve is off Safe checks first, then a pro
23.3 Pressure transducer senses over-pressure Call a pro
24.1 Fuse fault, short in the 24-volt wiring Call a pro
25.1 Control has no program loaded Call a pro
25.2 Control program file is corrupted Call a pro
25.4 Main program invalid, running on the backup program Call a pro
25.5 Installer settings are corrupted Call a pro
25.6 Wrong program loaded for this control Call a pro
26.1 Burner thermal switch open, permanent lockout Call a pro
27.1 Program in super plug is missing or corrupted Call a pro
27.2 Program in super plug is missing or corrupted Call a pro
27.3 Program in super plug is missing or corrupted Call a pro
31.4 Loss of pressure before the blower started Safe checks first, then a pro
31.5 Loss of pressure after the blower started Safe checks first, then a pro
34.1 Ignition fault, burners did not light in 4 trials Safe checks first, then a pro
34.2 Flame lost before the heating blower started Safe checks first, then a pro
34.3 Flame lost after the heating blower started Safe checks first, then a pro
34.4 Flame lost at reduced inducer pressure or in Self Healing mode Safe checks first, then a pro
41.1 No blower speed at start-up Call a pro
41.2 Blower speed lost while running Call a pro
41.3 Blower not reaching 500 rpm Call a pro
42.1 No inducer speed at start-up Call a pro
42.2 Inducer speed lost while running Call a pro
42.3 Inducer over its speed limit Call a pro
45.1 Internal control fault Call a pro
45.2 Gas valve relay will not close Call a pro
45.3 Control memory (EEPROM) fault Call a pro
45.4 Microprocessor communication lost Call a pro
51.1 Outdoor air sensor open Call a pro
51.2 Outdoor air sensor shorted Call a pro
52.1 Supply air sensor open Call a pro
52.2 Supply air sensor shorted Call a pro
53.1 Return air sensor open Call a pro
53.2 Return air sensor shorted Call a pro
btL Firmware failed to load Call a pro

Models in this range