How to Replace the Compressor Start Relay in a Frigidaire Compact Upright Freezer

When a Frigidaire compact upright freezer makes a clicking sound every few minutes but never starts cooling, the compressor start relay has almost certainly failed. This is the single most common repair on Frigidaire compact and mid-size upright freezers. The start relay provides the initial surge of electrical energy the compressor motor needs to begin running. Once the compressor reaches operating speed, the relay switches to the run circuit. When this relay fails, the compressor attempts to start, fails within 1-2 seconds (the click you hear), and the overload protector cuts power to prevent motor damage. The cycle repeats every 3-5 minutes.

This is a straightforward repair requiring no specialized tools and about 15-20 minutes of actual work time. Frigidaire compact freezers share the Electrolux compressor platform, and the start relay is a standard plug-on component accessible from the rear of the unit without any internal disassembly.

Before You Start

• Tools needed: Phillips #2 screwdriver (for rear access panel), 1/4" nut driver (some models), multimeter, flashlight
• Parts needed: Compressor start relay + overload protector kit (~$20-$35, Frigidaire part 241707701 or model-specific)
• Time required: 15-20 minutes
• Difficulty: Beginner
• Safety warning: Unplug the freezer completely. Wait 5 minutes before touching compressor components. The start relay capacitor holds minimal charge but prudence is warranted. The compressor body may be warm if it has been attempting to start repeatedly.

Step-by-Step Instructions

Step 1: Confirm the Symptom

Listen at the rear of the freezer. You should hear a pattern: click (compressor tries to start), brief hum lasting 1-2 seconds, another click (overload protector trips), then silence for 3-5 minutes before the cycle repeats. This pattern is diagnostic for start relay failure. If instead the compressor runs continuously without cycling off but the freezer is warm, the problem is likely elsewhere (sealed system or airflow issue, not the start relay).

Step 2: Access the Compressor Compartment

Pull the freezer away from the wall. On Frigidaire compact uprights, the compressor is at the bottom rear, typically covered by a cardboard or thin metal rear access panel held by 2-4 Phillips screws. Remove these screws and set the panel aside. The compressor is the black dome-shaped component with copper tubing connected to it. The start relay is the small plastic box (usually black or white) plugged directly onto the side of the compressor where 3 metal pins protrude.

Step 3: Remove the Failed Start Relay

Gently pull the start relay straight off the compressor pins. It should unplug with moderate force. Do not rock it side to side as the compressor pins are fragile. If an overload protector is attached to the relay assembly (a round disc component), it comes off as a unit. Shake the old relay gently: if you hear a rattling sound inside, the internal contact plate has broken loose, confirming failure. This is the most common failure mode for these relays.

Step 4: Test the Old Relay (Optional Confirmation)

Set your multimeter to resistance. On a PTC (positive temperature coefficient) relay, test between pins 1 and 2: should read 3-12 ohms at room temperature. Infinite reading confirms the internal element has cracked. On a standard coil relay, check for continuity through the coil and verify the contact opens and closes when the relay is tilted (gravity-operated relays) or when 120V is briefly applied to the coil terminals.

Step 5: Install the New Start Relay

Align the new relay with the compressor pins. The relay has a specific orientation (it only fits one way due to pin sizing). Push firmly and evenly straight onto the pins until fully seated. It should not wiggle or feel loose. If an external overload protector is separate from the relay, push it onto its designated pin as well. Ensure the wire connector from the power cord is reattached to the relay (typically one spade connector supplies incoming power).

Step 6: Test and Reassemble

Plug in the freezer and listen. Within 30 seconds, the compressor should start and run continuously with a steady hum (no clicking, no cycling off within seconds). Let it run for 5 minutes to confirm stable operation. If it starts and runs smoothly, unplug briefly, reinstall the rear access panel, push the freezer back into position, and restore power. The freezer should reach operating temperature (0F) within 4-8 hours.

Understanding Compressor Start Components

Frigidaire compact freezers use one of two relay types:

The PTC type is overwhelmingly more common on Frigidaire units from 2005 onward. It is a solid-state device with no moving parts, but the ceramic element is brittle and fails with thermal cycling over years of service.

When the Start Relay Is Not the Problem

If the new start relay does not solve the clicking/no-start:

• Compressor seizure: The compressor motor is mechanically stuck. Sometimes a "hard start kit" (aftermarket relay with extra capacitor boost) can overcome borderline seizure, but a truly seized compressor needs replacement
• Low voltage: Verify the outlet provides full 120V AC. Low voltage (under 110V) from a long extension cord or shared circuit prevents the compressor from starting even with a good relay
• Overload protector independently failed: Test the overload disc for continuity when cool (should be closed). Some models have the overload separate from the relay
• Wiring damage: Inspect the wire from the outlet cord to the relay terminal for loose spade connectors or heat damage

Cost Comparison: DIY vs Professional

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FAQ

Q: Why does my Frigidaire freezer click but not start? A: The clicking is the compressor overload protector cycling. The compressor attempts to start, cannot (due to a failed start relay), draws excessive amperage, and the overload protector cuts power to prevent motor burnout. Replacing the start relay resolves this in approximately 80% of cases.

Q: Can I use a universal start relay on my Frigidaire freezer? A: Yes, universal relay kits (3-in-1 hard start kits) work on Frigidaire compressors. However, the OEM relay is preferred for proper thermal cycling behavior. Universal kits are a good diagnostic tool: if the universal kit starts the compressor, you know the relay was the issue and can then install the exact OEM replacement.

Q: How long do Frigidaire compressor start relays last? A: Typical lifespan is 8-12 years under normal conditions. Factors that shorten relay life include frequent power outages (each causes a start event), excessive room temperatures (garage placement), and voltage fluctuations.

Q: Does the Frigidaire start relay replacement also apply to Electrolux freezers? A: Yes. Frigidaire and Electrolux use identical compressor assemblies and start components. The relay part numbers are interchangeable between brands.

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