Roper Refrigerator Start Relay Clicking, Compressor... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) sends a signal to the start relay, which then provides a boost of power to the compressor windings to initiate the start-up process. If the voltage is insufficient, or the compressor is drawing too much current (locked rotor), the overload protector trips, preventing the compressor from running. The relay clicks as it tries to engage and disengage.

Symptoms:

The Roper refrigerator is plugged in, and the lights inside are working, but the compressor isn't running. You hear a clicking sound coming from the compressor area, likely the start relay trying to engage but failing.

Possible Causes:

Failed start relay
Overload protector tripped
Locked rotor compressor
Low voltage to the refrigerator
Faulty compressor capacitor (if equipped)
Wiring issue between the relay and compressor

Solution:

1

Unplug the refrigerator from the outlet.
2

Locate the compressor start relay, typically mounted on the side of the compressor. It's often in a small plastic housing.
3

Use a 1/4-inch nut driver to remove the relay cover.
4

Visually inspect the relay for burned or broken components. Replace if damaged.
5

Check the voltage at the outlet with a multimeter. It should read approximately 120V AC. If low, check the breaker panel.
6

Use a multimeter to test the compressor windings for continuity. Disconnect the wires from the compressor first. If any winding is open or shorted to ground, the compressor is likely faulty. Note resistance values for each winding.
7

If the compressor has a capacitor, test it with a capacitance meter. Replace if out of spec. The capacitor is usually measured in microfarads (uF).

Safety Warning:

Disconnect power to the refrigerator at the breaker panel before performing any electrical testing or repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures to prevent accidental re-energization. High voltage is present when the unit is powered. Wear safety glasses.

Prevention:

Ensure the refrigerator has adequate ventilation. Avoid overloading the electrical circuit. Periodically check the condenser coils for dust and debris, and clean them with a vacuum cleaner brush attachment. This improves cooling efficiency and reduces compressor strain.

Expert Tip:

A common trick for a locked rotor compressor is to use a hard start kit. This provides a greater voltage boost for starting. However, this is a temporary fix and indicates a failing compressor. Also, some Roper models have a diagnostic mode. Consult the service manual for your specific model.

Frequently Asked Questions

•What are the typical resistance values I should see when testing the compressor windings?

Typically, you'll see low resistance (around 2-10 ohms) between the common and start windings, and between the common and run windings. The resistance between the start and run windings will be the sum of the other two. A short to ground indicates a major compressor failure.

•How do I determine if my Roper refrigerator has a start capacitor?

The capacitor is usually located near the compressor, either in the same housing as the start relay or mounted nearby. It's a cylindrical component, usually labeled with its capacitance value (e.g., 80-100 uF).

•If the outlet voltage is low (e.g., 105V AC), what could be causing that, and how do I fix it?

Low voltage can be caused by a overloaded circuit, loose wiring connections, or a problem with the main electrical service. Start by checking other appliances on the same circuit. If they're drawing excessive power, move the refrigerator to a dedicated circuit. Inspect the wiring at the outlet and breaker panel for loose connections. If the problem persists, consult a qualified electrician.

Roper Refrigerator Start Relay Clicking, Compressor Won't Start: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What are the typical resistance values I should see when testing the compressor windings?

•How do I determine if my Roper refrigerator has a start capacitor?

•If the outlet voltage is low (e.g., 105V AC), what could be causing that, and how do I fix it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: