297237702 Frigidaire Refrigerator start Relay is a compressor start device used on many Frigidaire refrigeration units; it is indeed a small electromechanical or solid-state module that momentarily energizes the compressor’s start circuit to bring the motor up to operating speed. As a component, it typically combines a relay function and, in some designs, an overload protector or interfaces with a separate overload-its construction and electrical ratings are chosen to match single‑phase hermetic compressor motors commonly found in residential refrigerators and freezers.
Inside the appliance, the start relay is directly involved with the compressor motor circuit and thus interacts with the start and run windings of the compressor, the thermostat or control board that calls for cooling, and ancillary protection devices such as the overload protector and the line supply. When the control calls for cooling the relay provides a timed or sensing engagement of the start winding (or momentarily connects a start capacitor where fitted) so the compressor can overcome initial torque and accelerate; once the motor reaches near‑running speed the relay disengages so only the run winding remains energized. A failed or intermittent relay affects compressor starting behavior and can present electrical signatures that also influence protective devices and system diagnostics.
This article explains the functional role of the 297237702 start relay, outlines the models and compressor types with which it is indeed compatible, and describes common failure symptoms such as humming, repeated tripping, no‑start, or unusually high current draw. It also provides practical diagnostic steps a technician or informed appliance owner can use-visual inspection,continuity/resistance checks,voltage and amp measurements at compressor terminals,and bench tests-plus replacement considerations including verifying part number and electrical ratings,handling and mounting notes,and basic safety precautions to follow during service.
Table of Contents
- Function and Role of the Start Relay in refrigerator Compressor Control
- How the 297237702 Frigidaire Refrigerator Start Relay Works Inside the Appliance
- Common Failure Symptoms and Diagnostic Indicators of a Faulty Start Relay
- Compatibility, Replacement Considerations, and Installation Procedures for the 297237702 Start Relay
- Q&A
- The Conclusion
Function and Role of the start Relay in Refrigerator Compressor Control
The 297237702 Frigidaire Refrigerator Start Relay is a small control device that provides the compressor motor with a brief boost to get the start winding energized during initial rotation, then removes that start circuit once the motor reaches running speed. In practical terms this relay either uses a PTC thermistor, a current-sensing element, or a small electromechanical contact to detect the proper start interval; the result is a timed or current-driven connection of the start winding that delivers high starting torque without allowing continuous start-winding current. when replacing this component, match the terminal layout, rated voltage, and intended compressor type because different relays can have different dropout characteristics and thermal ratings that affect compatibility and reliability.
- Common failure symptoms: compressor hums but does not start, repeated clicking at the relay, or intermittent runs followed by long off periods.
- Basic service checks: verify continuity across run and start terminals, listen for a distinct click on power-up, and compare measured resistances to manufacturer specs.
- Replacement guidance: use the exact part number or an equivalent with matching electrical and mechanical specifications; mount and wire the relay exactly as the original to preserve overload protection and ventilation.
Technicians should treat the start relay as a mechanical/electrical timing device rather than a source of refrigeration performance; replacing a faulty relay frequently enough restores compressor starting if the motor and sealed system are sound. If a new relay with correct specifications still fails to start the compressor, further diagnosis of the compressor windings, start capacitor (if present), or the sealed refrigerant system is warranted. For quick reference, the table below summarizes the relay’s role and a simple bench check often used during troubleshooting.
| Item | Description |
|---|---|
| Start action | Momentarily connects the compressor start winding to generate starting torque, then disconnects when run speed is achieved. |
| Typical test | Listen for click at power-up, check continuity between terminals, and compare resistance values to expected ranges for the compressor/relay assembly. |
How the 297237702 Frigidaire Refrigerator Start Relay Works Inside the Appliance
The 297237702 Frigidaire Refrigerator Start Relay is the component that momentarily applies additional current to the compressor’s start winding so the motor can overcome initial inertia and reach operating speed. In many Frigidaire systems this device is a compact electromechanical or solid-state module mounted at the compressor terminals; it senses the compressor’s current draw and opens the start circuit once the motor achieves synchronous speed. Functionally, the relay coordinates with the run winding and any separate overload protector to prevent prolonged start attempts that would overheat the motor, and replacement units must match the compressor’s terminal layout and electrical characteristics to operate correctly.
Technicians diagnose start-relay behavior by inspecting for audible clicking, measuring continuity and resistance across the start and run terminals, and verifying that the relay drops out after the compressor starts. Common practical checks include powering the refrigerator while monitoring the relay for transient engagement, and swapping with a verified compatible relay of the same specification when troubleshooting intermittent starts; always disconnect line power before handling. Typical symptoms and diagnostic cues include:
- Compressor clicks repeatedly or hums without starting - relay may not be closing the start circuit.
- Compressor starts briefly then stops – relay may be failing to remain engaged long enough or overload is tripping.
- Relay shows burned contacts, excessive heat, or open circuit – mechanical or electrical failure likely.
| Item | description |
|---|---|
| type | Start relay module for compressor start winding (electromechanical or solid-state) |
| function | Provides momentary start current and disconnects start winding once the compressor reaches operating speed |
| Typical failure symptom | Clicking sound, compressor not starting, intermittent operation |
| Compatibility | Replace with matching terminal configuration and electrical rating; designed for household line voltage (typically 120 VAC in North America) |
Common Failure Symptoms and Diagnostic Indicators of a faulty Start Relay
The 297237702 Frigidaire Refrigerator Start Relay is a small electromechanical or electronic device that momentarily connects the compressor start winding (or engages a start capacitor) during motor startup and then drops out so the compressor runs on its run winding. When functioning correctly the relay should provide a brief surge of current to the start circuit and then leave the motor on its run circuit; a failing relay commonly prevents the compressor from reaching full starting torque, causes excessive start current, or intermittently disconnects the start winding. This part is matched to Frigidaire compressor terminals and mounting geometry, so using the correct relay helps avoid improper terminal loads or clearance issues that can accelerate failure of both the relay and compressor motor.
- Audible humming or rapid clicking while compressor fails to start.
- Compressor starts briefly then stops (short run cycles) and fridge warms.
- Repeated tripping of the circuit breaker or blown fuses at startup.
- Visible scorch marks, melted housing, or burnt odor on the relay housing.
- Compressor runs but cooling is poor (start winding not being engaged properly).
Diagnostics combine visual inspection with electrical testing: remove power, disconnect the relay from the compressor, and inspect for heat damage or loose terminals; a rattling relay or charred contacts indicates internal failure. use a clamp ammeter to measure starting current - a relay that lets the compressor draw excessive inrush or fails to produce the expected short surge indicates malfunction. For electrical verification, check for continuity between start and run terminals consistent with the relay type (mechanical relays will show different contacts than PTC starters); also verify the relay has no continuity to chassis ground.if measurements are borderline or the relay shows intermittent behavior, replace with the correctly specified 297237702 unit or OEM-equivalent to maintain proper thermal and electrical characteristics and avoid damaging the compressor.
| Item | Description |
|---|---|
| Diagnostic clue | Humming with no start – suggests failed start relay or open start winding connection |
Compatibility,Replacement Considerations,and Installation Procedures for the 297237702 Start Relay
the 297237702 Frigidaire Refrigerator Start Relay is a small electromechanical/solid‑state assembly that momentarily energizes the compressor’s start winding to bring the motor up to speed,then removes that circuit so the compressor runs on the main winding.In practice the part controls inrush and timing for the start sequence and must match the compressor’s electrical characteristics (terminal layout, coil resistance/current rating, and overload protection) to operate reliably. When selecting a replacement, confirm the refrigerator model and compressor motor markings against the relay’s specification rather than relying solely on visual fit; mismatched relays can produce repeated starting attempts, overheating, or reduced motor life.
- Compressor hums but does not start
- Intermittent clicking at the rear near the compressor
- Compressor starts briefly then stops or runs hot
- Burnt or discolored relay/connector indicating thermal failure
| Item | Description |
|---|---|
| part number | 297237702 (OEM Frigidaire relay for specified compressor models) |
| Typical terminals | Start (S),Run (R),common (C) – verify labeling on relay and compressor |
| Electrical notes | Match operating voltage and rated start current; many replacements are form‑fit but differ in trip characteristics |
For replacement and installation,first disconnect power to the appliance and allow capacitors to discharge. Access the relay/overload assembly located on the compressor can (usually behind the access panel), document terminal positions or take a photo, remove the old relay by withdrawing the connector and any mounting clips, and install the new unit ensuring firm terminal engagement and correct orientation. After reinstalling the access panel, perform a quick operational check: verify compressor start behavior and measure continuity/resistance across the start/run/common terminals with a multimeter; persistent failure to start after installing a verified compatible relay indicates a likely compressor or control board fault rather than the relay itself.
Q&A
What is the 297237702 Frigidaire refrigerator start relay and what does it do?
The 297237702 start relay is an electrical component that helps the compressor start by momentarily routing extra current to the compressor’s start winding. It is indeed mounted at the compressor and works with the compressor’s run winding and, in many designs, an overload protector. Without a working start relay the compressor may hum, click, or fail to start, so the refrigerator will not cool properly.
Which Frigidaire models is part number 297237702 compatible with?
297237702 is an OEM Frigidaire start relay used on a range of Frigidaire (and some Kenmore/othre-branded) refrigerator models. Compatibility depends on the refrigerator model and compressor type. Always verify fit by checking your refrigerator’s model number against the part number in the manufacturer’s parts list or by entering both numbers on an authorized parts site before purchasing.
What are the common symptoms of a failing 297237702 start relay?
Common signs include the compressor repeatedly clicking on and off, a humming compressor that never starts, reduced or no cooling, fridge temperatures rising, and sometimes the relay getting hot to the touch. in some cases the refrigerator breaker may trip. These symptoms indicate the start circuit is not engaging the compressor properly.
How can I test the 297237702 start relay to see if it’s bad?
Basic tests: (1) Unplug the refrigerator. Remove the relay from the compressor (note terminals). Smell and visually inspect for burn marks or melted plastic. (2) use a multimeter to check for continuity between the relay terminals – values vary by design, but there should be continuity between start and run terminals and no short to ground (compressor shell).(3) If available,swap with a known-good relay of the same type or use a dedicated relay-tester. If the compressor starts with a known-good relay, the relay is faulty.Do not attempt to energize a bare compressor/relay assembly from mains unless you know proper safety procedures.
Can I replace the 297237702 relay myself, and what tools are needed?
Yes, a competent DIYer can usually replace the relay. Tools: screwdriver or nut driver to remove access panel, pliers to pull the relay off the compressor terminals, and optionally a multimeter for testing. Steps: unplug the fridge, remove the access panel, carefully remove the old relay (and any foam cover), fit the new OEM relay onto the compressor terminals, reassemble, and restore power. If you are uncomfortable working near the compressor or handling electrical parts, hire a trained technician.
Is the 297237702 relay different from the compressor overload protector?
Yes. The start relay provides the initial boost to engage the compressor start winding. The overload protector is a separate device (sometimes integrated with the relay) that interrupts current to the compressor if it overheats or draws excessive current.some replacement assemblies combine both functions, but you should confirm whether the relay you purchase includes the overload or if it’s a separate part for your model.
How much does a replacement 297237702 start relay usually cost and where should I buy one?
Prices vary by supplier but OEM Frigidaire start relays typically range from roughly $10-$40. Buy from authorized Frigidaire parts dealers,reputable appliance-parts retailers,or directly from Frigidaire/brands’ parts websites to ensure you receive an OEM or properly compatible part. Be cautious of low-cost unknown aftermarket sellers.
After replacing the 297237702 relay the compressor still won’t start – what should I do next?
if a correct new relay is installed and the compressor still won’t start, the problem may be the compressor itself, the start capacitor (if used by that compressor), wiring, the thermostat/control board, or the overload protector. Check for proper voltage at the compressor terminals with the fridge powered (qualified technician recommended). If electrical checks are normal, contact an appliance technician for compressor diagnosis and possible replacement; compressor repairs are more complex and often require professional service.
The Conclusion
The 297237702 Frigidaire refrigerator start relay plays a critical role in initiating compressor operation by regulating the startup current and ensuring the compressor activates reliably. As a small but essential component,a properly functioning start relay contributes to consistent cooling performance,energy efficiency,and protection of the compressor from repeated or prolonged hard starts that can shorten appliance life.
accurate diagnosis and timely replacement of a failing 297237702 relay are notable to restore reliable operation and to avoid more extensive damage or unnecessary expense. Because symptoms of relay failure can overlap with other electrical or refrigeration faults, confirming the cause through appropriate testing or professional evaluation helps ensure the correct remedy. When replacement is required, using the correct part and following manufacturer-recommended installation or seeking qualified service will best preserve performance, safety, and long-term reliability of the refrigerator.
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