Thermo King SB-190 Model 30 Error Codes 03,04

[JOSHB]

Hello everyone, I am the Maintence Supervisor at a small transportation company in TN, we have just purchased some used reefer units, I have error code 03, and 04 showing which is shutting down the unit. I know the 03 is return air sensor, and 04 is discharge air sensor, can I reset these somehow or what should do.

[bruisermac]

post in transport section

[frank]

Thread moved.

[abbsnowman]

Can you clear the codes? There is a plug that attaches to the micro with all the sensor wires. Often these plugs are loose and you will need to put in a periferial seal. It is like a small rubber oring that goes in plug.
It may also be bad sensors but not realy common to see 2 sensors fail at the same time.