Hi there, does anyone know fault code 21E is on the Aircon screen on a cat 336D excavator?
Here you go, should be everything you need there.
We have a 320D and 345D, and on each of those if you see an E behind the temp it indicates a fault with the a/c, like low on freon.
Didn't read the linked diagnostic instructions? 21E tells us that the sensor at the evaporator is an open circuit.
No, it wasn't up when I posted. It popped up as soon as hit Post Reply. What all can cause an open circuit? I apologize for trying to help.
Open circuit is one of two things, either a wire is broken or the sensor is faulty.
Thanks heaps Everyone I’ll have a look at the machine tomorrow
Ahart are you able to send me the attachment file for some reason I can’t open it? Thanks [email protected]
Sent