Why won't the compressor or condenser fan on my test chamber start?

Check out these possible causes and solutions when your unit is connected to a suitable electrical system, the compressor and condenser fan are not connecting:

A blown fuse in the mainline or in the compressor circuit.	SOLUTION: Locate the source of the overload and replace the fuse.
A defective refrigeration switch.	SOLUTION: Replace the defective switch.
The refrigeration circuit has a defective power relay.	SOLUTION: Replace the defective part with an equivalent relay.
The off/on, high/low or pressure switches (if equipped) have cutout.	SOLUTION: Push the button on the individual controls to reset. Also, check the cause of the pressure cutout.

Check out these possible causes and solutions when your unit is connected to a suitable electrical system, the condenser fan is operating but the compressor is not:

Low line voltage or your system is attempting to operate on inadequate wiring.	SOLUTION: If your voltage is low, install a booster transformer. If low voltage occurs only when other loads draw excessively, try connecting the unit to another line which is not overloaded.
The compressor is off due to an internal overload.	SOLUTION: Examine the compressor to verify proper voltage supply.
There is an open circuit in wiring to the compressor.	SOLUTION: Locate the open circuit and repair.
The compressor(s) current relay is defective or there is an internal thermal overload.	SOLUTION: Replace the defective part.
The compressor is defective.	SOLUTION: Replace the compressor.

Why won't the compressor or condenser fan on my test chamber start?

There could be a number of causes including a blown fuse in the mainline or in the compressor circuit, a defective refrigeration switch, a defective power relay in the refrigeration circuit, and more.