Roper Refrigerator Compressor Clicking and Stopping:... | appliancefaults.com

Technical Background:

The MCU sends a signal to the compressor relay. The start relay provides a boost to get the compressor motor spinning. The overload protector safeguards the compressor from overheating. Voltage must be within acceptable limits for proper operation.

Symptoms:

The Roper refrigerator compressor makes a single clicking sound and then stops. The refrigerator is not cooling. This clicking might repeat every few minutes.

Possible Causes:

Failed start relay or overload.
Defective compressor motor.
Low voltage to the refrigerator.
Locked rotor in the compressor.
Faulty main control board (MCU).

Solution:

1

Unplug the refrigerator from the outlet.
2

Locate the compressor and access the start relay/overload assembly. This is usually a small black box plugged directly into the compressor terminals.
3

Use a multimeter to check the continuity of the overload protector. It should read near zero ohms. If open, replace it.
4

Check the start relay. If it is a solid-state relay (PTC), test for resistance. If open or shorted, replace it. If it's an electromechanical relay, shake it gently. If you hear rattling, it's likely failed and needs replacement.
5

Verify the voltage at the outlet is 120V AC using a multimeter. Low voltage can prevent the compressor from starting.
6

If the start components test good, the compressor motor itself may be defective. A locked rotor test may be performed by a qualified technician using specialized equipment.
7

If all else fails, suspect a faulty main control board (MCU). Inspect the board for burned components. If found, replace the MCU. Always use OEM parts.

Safety Warning:

Always disconnect power to the refrigerator before performing any repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures to prevent accidental power-up. High voltage is present in the control circuits.

Prevention:

Ensure the refrigerator has adequate ventilation. Clean the condenser coils at least twice a year using a vacuum with a brush attachment.

Expert Tip:

Sometimes, tapping the compressor lightly with the handle of a screwdriver (while the unit is plugged in and attempting to start) can temporarily free a locked rotor. This is not a permanent fix and indicates compressor failure, but it can sometimes help with diagnosis.

Frequently Asked Questions

•How do I check the compressor windings?

Disconnect the start relay and overload from the compressor. Using a multimeter set to ohms, check the resistance between each pair of terminals on the compressor. You should see a low resistance value (e.g., 2-15 ohms) between each pair. An open or shorted winding indicates compressor failure.

•Where is the main control board (MCU) located?

The main control board is typically located behind the control panel inside the refrigerator, or at the back of the unit, often behind an access panel. Refer to the service manual for the specific location for your Roper model.

•How can I tell if the compressor is truly locked?

A locked rotor test involves using a specialized meter to measure the current draw of the compressor during startup. An excessively high current draw that doesn't decrease after a brief moment indicates a locked rotor. This test requires specialized equipment and should only be performed by a qualified technician.

Roper Refrigerator Compressor Clicking and Stopping: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I check the compressor windings?

•Where is the main control board (MCU) located?

•How can I tell if the compressor is truly locked?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: