Why wont mt air compressor stay running - Hitachi EC12 Portable Electric 2hp Air Compressor, Oil Lubricated

You will need an air compressor, remove spark plug wires attached at plug locations. use air compressor to blow out any water in the plug area and in the spark plug cable boots.

on what ???

Does motor have a start capacitor/relay that could be bogus?

You'll need to check the back-pressure on the low-side of the system, you have a faulty compressor. If there is a condenser fan motor make sure it is running when the compressor is on.

either its the contactor,ptc overload relay on the compressor,the motor start/run capacitor or possibly its a little low on R-134A refrigerant and the pressure switches are cutting off the compressor to protect it

thermostat could not be set properly, compressor could not be running, unit could be low on freon. start checking some items and let me know.

Flushed system replaced compressor, expansion valve and drier, evacuated system then let set overnight to check for leaks now replacing oil then I will charge the air.

their web site says it is to maximize defogging.
http://www.beverage-air.com/images/glassDoorMerchandisers/manuals/809-005A.pdf
See if you can get to their web site. In the operations section, under initial start up, it talks about this. Can't find anything else on this.
Good Luck-Hope this helps.

If your compressor is running all the time, it is almost certain that you have a leak. It could be either in the lines going to the rear air bags, or the air bags themselves. Simplest way to find a leak, is to get a spray bottle with soapy water, make sure the suspension is aired up, and spray the lines starting from the compressor. Work all the way back to the bags, now when you get the bags nice and soapy then bounce the rear of the truck up and down. If their are any leaks the soapy water will bubble up showing you wear the leak it.
That is how i would start.

If its a bigger leak the rear air bags wont stay aired up, if its a small leak, then the air compressor will be running all the time to keep the truck aired up.

Remember, when you are driving, the compressor is constantly working to keep the rear bags at the proper height, even more so on rough roads.

The inside fan has to run all the time. It turns off it will not keep things cold. Not the fan outside in the air it shoulc cycle with the compressor.