297286803 Frigidaire Refrigerator Run Capacitor is a motor-run capacitor intended for continuous operation in single-phase refrigeration systems; it is a non-polarized AC capacitor typically packaged in a metal can or molded housing and used too provide the reactive phase shift and energy storage required by induction motors. As a run capacitor, it differs from a start capacitor in that it is indeed designed for continuous duty to stabilize motor torque and improve running efficiency rather than to provide a large short-duration starting boost.
Inside a refrigerator, the run capacitor interfaces directly with the compressor motor circuit and often with condenser or evaporator fan motors through the appliance’s relay or control board. It creates the necessary phase displacement between windings in single-phase induction motors to produce smooth, sustained torque, reduces motor current and heat under load, and contributes to acceptable power factor and system stability. The component is typically mounted near the compressor or inside the appliance’s service access area and forms part of the motor-start/motor-run subcircuit together with start relays, overload protectors, and the control logic.
This article explains the electrical function and practical role of the 297286803 run capacitor, how to determine compatibility with specific Frigidaire models, common failure symptoms (such as elevated compressor current, failure to start, intermittent cycling, audible motor hum, or visible capacitor damage), and basic troubleshooting methods technicians can use-visual inspection, capacitance testing, and in-circuit symptom correlation. It also covers replacement considerations including matching capacitance and voltage ratings, duty and temperature ratings, terminal type and mounting constraints, and safe handling practices such as disconnecting mains power and discharging capacitors before service.
Table of Contents
- Function and Role of the Run Capacitor in Refrigerator Compressor and Fan Circuits
- How the 297286803 Frigidaire Refrigerator Run Capacitor Works Inside the compressor Motor and Start‑Up Circuit
- Common Failure Symptoms and Electrical Signatures of a Faulty Run Capacitor
- Replacement Considerations, Specifications and Safe Installation Procedures for the Run Capacitor
- Q&A
- Final Thoughts
Function and Role of the Run capacitor in Refrigerator Compressor and Fan Circuits
The run capacitor provides continuous phase-shifted current to the compressor and evaporator-fan motors so they produce a stable rotating magnetic field and run with lower current draw and better torque. The 297286803 Frigidaire Refrigerator Run Capacitor is a service part that performs this function in many Frigidaire models: it stores and releases energy on each AC cycle to maintain the proper phase relationship between windings, smooths line transients, and improves power factor. Physically this type of capacitor is an AC-rated, non-polarized device (metalized film construction) sized for the motor load; replacing it requires matching the original capacitance (µF) and voltage rating to avoid reduced performance or premature motor stress.
When a run capacitor degrades, the compressor may hum, take longer to reach operating speed, cycle more frequently, or draw elevated current; fans can run weakly or stall. Typical on-site checks include measuring capacitance with a meter and observing terminal labels (C, HERM/R, FAN) to confirm wiring. Replacement is appropriate when capacitance is out of tolerance or ESR is high; always choose a direct-equivalent part or one with the same µF and equal-or-higher AC voltage rating and retain the same terminal mapping to ensure compatibility and safe operation.
- Common failure symptoms: slow start, humming, frequent cycling, increased amperage draw, or inability of the fan or compressor to start.
| item | Description |
|---|---|
| Capacitance | Specified in µF; must match original (typical refrigerator run caps commonly range from ~5-20 µF depending on model). |
| Voltage rating | AC working voltage (commonly 370-440 VAC); replacement must be equal or higher. |
| Terminals | Marked C, HERM (or R), FAN – preserve terminal connections when replacing. |
How the 297286803 Frigidaire Refrigerator Run Capacitor Works Inside the Compressor Motor and Start‑Up Circuit
The 297286803 Frigidaire Refrigerator Run Capacitor supplies a continuous, phase-shifted current to the compressor’s auxiliary winding, which increases starting torque and smooths motor operation after the initial engagement.In motors that use a dedicated run capacitor, the capacitor stays in circuit during normal operation to maintain the correct phase shift between the main and auxiliary windings, improving running stability and reducing heat and current draw compared with a motor that relies only on a momentary start device. Compatibility depends on matching the specified capacitance (µF) and voltage rating on the compressor or relay assembly; a direct replacement must meet or exceed the original voltage rating and closely match the capacitance for predictable performance.
- Common symptoms of a failing run capacitor: slow or labored starts, humming without rotation, increased compressor current, or frequent tripping of thermal overloads.
- interaction with start devices: the run capacitor works in concert with relays or PTCs-if the relay fails, the capacitor alone cannot correct a defective start circuit.
- Replacement guidance: match µF value within manufacturer tolerance and use equal-or-higher voltage rating; measure capacitance and ESR when diagnosing.
During the start sequence the run capacitor provides the auxiliary winding a steady phase offset so the rotor develops torque promptly; if capacitance is low the compressor may struggle to accelerate and the motor current will rise, perhaps overheating the unit or causing repeated relay cycling. Technicians commonly confirm a capacitor’s condition with a capacitance meter or dedicated capacitor tester and inspect for bulging, electrolyte leakage, or high ESR; replacing the capacitor with a correctly rated 297286803-equivalent component restores the intended start-up characteristics and helps prevent premature compressor stress. For practical diagnostics,isolate the capacitor,measure its µF value against the nameplate,and observe whether restoring correct capacitance returns normal start-up times and reduced running current.
| Item | Description |
|---|---|
| Function | Provides continuous phase shift to auxiliary winding for starting torque and stable running. |
| Typical connection | Mounted in the compressor start/run circuit or on the relay assembly; remains in circuit during operation. |
| Compatibility check | Match capacitance (µF) and use equal-or-higher voltage rating; verify relay type and motor nameplate. |
Common failure Symptoms and Electrical Signatures of a Faulty Run Capacitor
The run capacitor provides the phase shift and stable running current necessary for the compressor and evaporator fan motors to maintain torque and efficient rotation; a failing unit degrades start-up torque and raises motor current draw. The 297286803 Frigidaire Refrigerator Run Capacitor is specified to match the refrigerator’s motor circuit in capacitance and voltage rating, and compatibility requires replacing like-for-like (capacitance value, voltage rating, and terminal configuration).Technically, common failure modes are a loss of usable capacitance, increased equivalent series resistance (ESR), internal leakage, or an internal open/short. In practice these electrical changes manifest as prolonged start attempts, a persistent humming sound, repeated compressor start/stop cycles, or motor overheating that often resolves when the capacitor is replaced with a correct-match unit.
- Humming or slow-starting compressor and fans; motor stalls or takes repeated attempts to start.
- Intermittent cycling or frequent overload trips and high measured inrush or running amperage on the compressor circuit.
- Physical signs: bulging, venting, or discoloration of the capacitor housing.
- Meter signatures: capacitance reading considerably below nameplate, elevated ESR on an LCR meter, measurable leakage current, or continuity indicating an internal short.
| item | Description |
|---|---|
| Capacitance | Measured microfarads substantially lower than the rated value indicate loss of stored charge capacity and reduced starting torque. |
| ESR / Impedance | Elevated ESR causes voltage drop under load and heat dissipation; symptomatic of aged dielectric and reduced performance. |
| Leakage / Insulation | Increased leakage current or decreased insulation resistance suggests dielectric breakdown and potential heating or failure under load. |
| Open/Short | An open circuit means no phase-shift action; a short can create immediate overloads-either condition requires replacement. |
For diagnosis remove and safely discharge the capacitor before testing with a suitable meter: measure capacitance in microfarads and check ESR/leakage with an LCR or dedicated capacitor tester, comparing results to the nameplate rating; readings well below the rated capacitance or a marked increase in ESR are practical indicators to replace the unit. When replacing, select a capacitor that matches the original 297286803 Frigidaire Refrigerator Run Capacitor’s rated capacitance and voltage (and the same terminal arrangement), since incorrect values can cause poor motor performance or expedited failure of the compressor and associated controls.
Replacement Considerations, Specifications and Safe installation Procedures for the Run Capacitor
The 297286803 Frigidaire Refrigerator Run Capacitor is a motor-run capacitor that provides the continuous phase shift and reactive energy required by the compressor and fan motors to develop smooth torque and stable current draw. The capacitor reduces ripple on the motor supply, helps control inrush and running currents, and affects compressor efficiency and temperature rise; when selecting a replacement, match the nominal capacitance in microfarads (µF), the rated AC voltage, terminal configuration, and the capacitor’s rated temperature range and physical mounting so the replacement fits the same electrical and mechanical envelope.
- Disconnect power at the branch circuit before accessing the capacitor compartment.
- Label or photograph wire positions before removal to preserve terminal mapping.
- Discharge the capacitor using a suitable resistor (for example, a 10 kΩ, 2 W resistor across the terminals) and verify with a multimeter that residual voltage is safe.
- Verify capacitance with a capacitance meter; replace only with equal µF and equal-or-higher voltage rating and temperature class.
- Use insulated spade connectors, secure mounting, and restore all covers before re-energizing.
| Item | Description |
|---|---|
| Capacitance | Match nominal µF value within specified tolerance to preserve motor phase shift. |
| Voltage rating | Use equal or higher AC voltage rating to provide margin against dielectric stress. |
| Temperature / enclosure | Choose a capacitor with equal or better temperature rating and sealed construction for refrigerator ambient conditions. |
Before final reassembly, bench-test or measure while the unit is powered to ensure motor current and running behavior are within expected ranges; an increased current or humming after replacement suggests an incorrect capacitance or wiring error. For practical replacements, if the original part has a marked value (such as, 12.5 µF at 440 VAC), procure a replacement with the same µF and at least the same voltage and temperature ratings, use properly rated insulated connectors, and verify operation with a clamp ammeter and temperature checks rather than relying solely on subjective noise or vibration observations.
Q&A
What is the Frigidaire part 297286803 and what does the run capacitor do?
Part 297286803 is a run capacitor used on certain Frigidaire refrigerators. A run capacitor provides a continuous phase shift to the compressor (and sometimes fan) motor so the motor runs efficiently and with the correct torque. It stays in the circuit while the motor is running (unlike a start capacitor, which is only engaged briefly at startup).
what are common symptoms of a failing run capacitor on a refrigerator?
Typical symptoms include a refrigerator that hums but won’t cool (compressor won’t start), the compressor trying to start repeatedly, higher-than-normal operating temperature, louder or unusual motor noise, and increased electrical draw. visual signs on the capacitor itself can include bulging,leaking,or burnt terminals.
How can I test the 297286803 run capacitor to see if it’s bad?
Always disconnect power first. Discharge the capacitor safely (see next answer). Remove it from the circuit and use a meter with a capacitance function to measure microfarads (µF) across the capacitor’s terminals. Compare the reading to the value printed on the capacitor; readings outside the manufacturer’s tolerance indicate failure. If you don’t have a capacitance meter, a qualified technician can test it. A basic ohmmeter test is not reliable for diagnosing run capacitors, though a shorted capacitor will show low resistance.
How do I safely discharge and replace a refrigerator run capacitor?
Turn off and unplug the refrigerator.Wear eye protection and insulated gloves. Discharge the capacitor by shorting its terminals through a suitable resistor (e.g., a 10 kΩ, 5-10 W resistor) or follow the manufacturer’s recommended discharge procedure-do not rely on a bare screwdriver unless you know what you’re doing, because that can spark and damage the capacitor or cause injury.After discharge, remove the rapid-disconnect terminals and mounting bracket, noting the terminal positions. Replace with an identical-type motor run capacitor (same µF, equal or higher voltage rating, same terminal type) and reattach wiring in the same order. If you are uncertain, hire a trained appliance technician.
Can I replace the 297286803 with any capacitor that has the same µF rating?
You must match more than the µF value. Use a capacitor that is the same type (motor run/continuous duty), the same capacitance (µF) within tolerance, and an equal or higher voltage rating. Terminal style and physical size should fit the mounting location. Do not substitute a start capacitor or a capacitor with a lower voltage rating. When in doubt, use the OEM part number or a direct cross-replacement recommended by Frigidaire.
Is the 297286803 polarized and does polarity matter when installing it?
Run capacitors used on motors are non-polarized, so there is no polarity to observe when connecting the terminals. However, you must connect the wires to the same terminals and positions as the original unit to preserve the correct circuit configuration.
Do all Frigidaire refrigerators use a run capacitor like the 297286803?
No. Not all refrigerators use a separate run capacitor-some use a start relay and overload on the compressor instead, or have different arrangements for fan motors. Confirm whether your specific Frigidaire model lists 297286803 as the correct part by checking the appliance model number, the parts list, or Frigidaire’s parts lookup before ordering or replacing anything.
Where can I buy part 297286803 and is there a warranty or disposal guidance?
You can buy the OEM part from Frigidaire-authorized parts distributors, appliance parts websites, or appliance service centers-verify the seller and part number to ensure compatibility. OEM parts often carry a limited parts warranty; check the vendor for terms. Dispose of old capacitors according to local regulations. Modern motor run capacitors are usually not PCB-containing,but if you encounter an older oil-filled capacitor or see labeling indicating hazardous contents,handle it as hazardous waste and follow local disposal rules.
Final Thoughts
The 297286803 Frigidaire refrigerator run capacitor is a small but critical component that helps maintain steady electrical phase and voltage to the compressor and condenser fan motors. By providing continuous reactive power,the run capacitor supports efficient motor operation,improves starting and running stability,reduces electrical stress on the compressor,and contributes to overall cooling performance and energy efficiency. Because it directly affects motor torque and current draw, a properly functioning run capacitor plays a notable role in prolonging component life and preventing premature refrigerator failures.
Accurate diagnosis and correct replacement of a failing run capacitor are essential to restore reliable operation and avoid further damage. Symptoms such as persistent humming,intermittent cooling,increased energy use,motor overheating,or failure to start can indicate capacitor problems,but similar symptoms may stem from other electrical or mechanical issues.Confirming the condition with appropriate testing equipment and replacing the part with the correct specifications-matching capacitance and voltage or using the manufacturer-recommended 297286803 part-ensures safe, effective repairs. Because capacitors can hold a charge and refrigerator systems present electrical and refrigerant hazards, follow safety procedures and consider professional service when diagnosis or replacement is uncertain.
Professional Appliance Service
If your appliance requires professional diagnosis or repair, visit
Revolff Home Services
for expert appliance repair services.
For local appliance service information see
Dryer repair Henderson
.
Replacement parts for many appliance models can also be found at
Reliable-Parts-Hub
.
Recommended Products
The Blincoo Elite 48" Heavy Duty Dog Rope Toy is made for large breeds that love tug-of-war, chewing, and active play. Strong, simple, and fun for powerful dogs.
Shop on TikTok