4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control is a temperature-regulation component used on many whirlpool refrigerators to control the cold circuit. It is a thermostat/cold-control device – typically an electromechanical switch with an internal temperature sensing element – that allows the user or the appliance control system to set and maintain a target refrigerated temperature by opening and closing the electrical circuit that feeds the cooling system.
Inside the appliance, this thermostat senses temperature (via an internal sensor or remote sensing element) and actuates the control contact that enables or disables the compressor, and in some designs also controls evaporator fans or defrost-related circuits. It therefore interfaces directly with the compressor start/relay circuit, fan motors and the appliance control harness, and it operates as the primary feedback element in the temperature regulation loop. Proper function prevents excessive cycling, reduces unnecessary run-time and helps maintain stable evaporator and cabinet temperatures critical for food safety and component longevity.
In this article readers will find a technical overview of how the 4387562 temperature cold control functions, guidance on compatibility and electrical ratings to check when replacing the part, common failure symptoms (such as: no cooling, continuous run, rapid cycling or intermittent operation), step-by-step troubleshooting approaches including continuity and voltage checks, and practical replacement considerations such as correct wiring, mounting, calibration and safety precautions. The goal is to provide technicians, engineers and appliance owners with the diagnostic and replacement information needed to evaluate and service this thermostat in the field.
Table of Contents
- Function and Thermal Control Role of the thermostat in Whirlpool Refrigeration Systems
- How the 4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control Regulates Temperature: Internal Mechanisms and Electrical characteristics
- Common Failure symptoms and Diagnostic indicators of a Defective Thermostat Assembly
- Compatibility matrix, Replacement Considerations, and Installation Procedures for the 4387562 Thermostat
- Q&A
- to Conclude
Function and Thermal Control Role of the thermostat in Whirlpool Refrigeration Systems
The 4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control is an electromechanical temperature-sensing switch used to regulate compressor and evaporator fan operation in compatible Whirlpool refrigeration units. It senses cabinet or evaporator air temperature via a probe or capillary sensor and operates an internal contact set: when the sensed temperature rises above the user-selected setpoint the contacts close to energize the compressor circuit, and when the target temperature is reached the contacts open to de-energize the compressor. In typical service practice this part acts as the primary on/off temperature control and must be matched for probe location, mounting style, and terminal arrangement to ensure correct control behavior and safe integration with the refrigerator’s start relay, defrost timer, and electronic controls.
- Control behavior: closes on temperature rise, opens on temperature fall (call for cooling then release).
- Compatibility considerations: verify probe length, knob indexing, and terminal harness before replacement.
- common failure symptoms: continuous run, no compressor operation, or excessive temperature swing.
- Service checks: continuity testing at set positions and verifying probe placement relative to the evaporator or cabinet air path.
| Item | Description |
|---|---|
| Part | 4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control |
| Function | Electromechanical temperature switch controlling compressor and fan circuits |
| Sensor type | Probe or capillary bulb (mounting and length vary by model) |
| Service checks | Continuity test across terminals at different setpoints; verify thermal response in situ |
For troubleshooting and replacement, begin by measuring continuity across the thermostat terminals while manipulating the control knob: a closed contact at warmer settings indicates the device is calling for cooling. Practical examples: if the compressor never runs but the thermostat shows closed continuity, fault isolation should move to the start relay and compressor; if the thermostat never closes, replace or inspect the sensor/probe placement for poor thermal contact. When selecting a replacement, confirm electrical terminal arrangement and mechanical mounting match the original, because mislocated probes or incorrect terminal wiring can produce incorrect cycling, excess run time, or prevent integration with timed defrost sequences.
How the 4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control Regulates Temperature: Internal Mechanisms and Electrical Characteristics
4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control uses a temperature‑sensitive element coupled to a mechanical switching mechanism to regulate refrigeration cycles. Inside the housing a sensing element (a small capillary tube or bimetal sensing element depending on the production run) detects air or evaporator temperature and moves a contact set that completes or interrupts the compressor/control circuit. The adjustable shaft changes the setpoint so the control closes the circuit when temperature rises above the chosen point and opens it onc the evaporator/compartment reaches the lower threshold; the span (hysteresis) is steadfast by the internal spring and sensing element geometry, which produces repeatable on/off cycling rather than continuous modulation. In practical terms, the control prevents short cycling by providing a built‑in differential and interfaces with the relay or start device that supplies the compressor motor.
The part is intended as an OEM replacement and must be matched to the refrigerator’s wiring harness and mounting orientation for correct operation. Electrical behavior is that of a line‑voltage switching thermostat: the device carries compressor and control circuit currents and will have contact ratings and a voltage rating stamped on the body-verify against the appliance nameplate before installation. Troubleshooting examples: a thermostat with welded contacts will keep the compressor running continuously and produce overcooling; an open or corroded contact will prevent compressor start and cause warming. For installers,confirm the shaft type,number of terminals,and physical mounting to ensure compatibility and safe wiring practices.
- Function: temperature sensing and on/off control of compressor circuit
- Behavior: mechanical setpoint with fixed hysteresis to avoid rapid cycling
- Compatibility considerations: verify part number, terminal count, and voltage rating
- Common failure symptoms: continuous run, no run, or intermittent cycling
| Item | Description |
|---|---|
| Part | 4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control |
| Sensor type | mechanical temperature element (capillary or bimetal variant) |
| Typical voltage | Household mains ≈115-120 VAC (verify marking on part) |
| Contact rating | Designed for compressor/control circuit currents; check stamped amperage before replacement |
Common Failure Symptoms and Diagnostic Indicators of a Defective Thermostat Assembly
The thermostat assembly regulates refrigeration cycle timing by sensing cabinet or evaporator temperature and opening or closing the switch that supplies power to the compressor and fan. The 4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control is a direct replacement-style control that must match the original part’s terminal configuration and sensing location; incorrect orientation or terminal mapping can produce legitimate control signals that nonetheless fail to actuate the compressor. When the sensing element or switch contacts degrade, typical behaviors include the compressor failing to engage (open circuit), continuous run (contacts stuck closed), intermittent operation due to contact bounce or corrosion, and temperature hunting caused by a shifted calibration or poor thermal coupling to the evaporator tube or cabinet bulkhead.
Diagnosing a defective thermostat requires electrical and functional checks: measure DC/AC continuity across the thermostat terminals at multiple dial settings, verify that the thermostat switches line voltage to the compressor when the unit is calling for cooling, and listen for a mechanical “click” as the control changes state. Use a multimeter to confirm continuity closes when the evaporator is warm and opens when cold; if the thermostat passes those bench tests but symptoms persist, measure voltage at the compressor relay/overload to isolate a sealed-system or relay fault. For technicians, practical indicators that point to the thermostat specifically include consistent open/closed behavior correlated to dial position, visible corrosion on terminals, and no change in switch state when the sensor area is warmed or cooled with a heat source or ice pack.
- Compressor will not start – thermostat remains open or sensor is disconnected.
- Compressor runs continuously – contacts may be welded or stuck closed.
- Temperature cycles erratically or short-cycles – contact bounce, incorrect calibration, or poor thermal coupling.
- Intermittent cooling – loose terminal, corrosion, or broken sensor led.
| Item | Description |
|---|---|
| Symptom: No compressor operation | Check for continuity across the thermostat at a cold call; verify line voltage present at the thermostat input and output when calling for cooling. |
| Symptom: Continuous run / freezer too cold | inspect for stuck closed contacts with an ohmmeter and test by warming the sensor area; replace if contacts do not open. |
| Symptom: Intermittent or erratic cycling | Look for contact bounce with an oscilloscope or multimode logging, terminal corrosion, and ensure proper sensor mounting and thermal coupling to the evaporator. |
Compatibility Matrix, Replacement Considerations, and Installation Procedures for the 4387562 Thermostat
The 4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control is a mechanical temperature switch that governs compressor and evaporator fan cycling by sensing cabinet or evaporator temperatures via a capillary/bulb sensor and opening or closing internal contacts. Compatibility with a given refrigerator depends on sensing-bulb length and placement, terminal configuration (typically SPDT or SPST screw terminals), mounting bracket geometry, and the thermostat’s switching differential; swapping to a unit with a different bulb length or terminal layout can produce short-cycling, improper temperatures, or wiring difficulties. Technicians verify compatibility by matching the physical sensor routing, confirming terminal labels and harness connectors, and checking for similar actuation behavior (for example, a tighter differential will produce more frequent on/off cycles).
- Disconnect power and document wire positions before removal.
- Remove control knob and access panel to reach thermostat body and capillary.
- Transfer or replace the sensor bulb, securing it with the original clamp to the evaporator or designated mounting point without kinks.
- Reconnect wires to identical terminals; if terminal shapes differ, use an adapter or correct connector to avoid loose connections.
- restore power and verify correct operation by observing compressor run/stop cycles and measuring internal temperatures over several hours.
| Item | Description |
|---|---|
| Typical terminals | SPDT or SPST screw/snap terminals, 120 VAC rated, verify with multimeter before installation |
| Sensing method | Capillary bulb sensor; mounting location and bulb length determine accurate control |
| Common failure modes | Loss of contact continuity, damaged bulb, incorrect mounting causing slow or fast cycling |
Replacement procedures require careful handling of the capillary tube: securing the bulb in the original position preserves the sensing habitat and prevents thermostat hunting. After mechanical installation, confirm electrical function with an ohmmeter by observing contact closure as the sensor is cooled or warmed; if the original thermostat had a setpoint adjustment, note its position and set the new control to a matching index before powering the appliance. Practical troubleshooting steps include swapping the harness to a known-good thermostat of the same specification, checking for ice buildup that insulates the bulb, and monitoring temperature stabilization for at least 24 hours to ensure the replacement restores proper cold control without unintended short cycling.
Q&A
What is the 4387562 Whirlpool Refrigerator Thermostat (Temperature Cold Control) and what does it do?
The 4387562 is a temperature “cold control” thermostat used on many Whirlpool-family refrigerators. It is indeed a mechanical (electromechanical) control that senses temperature (frequently enough via a small sensing bulb or internal element) and opens or closes a switch to turn the compressor and cooling circuit on and off to maintain the set temperature.
How do I know if 4387562 is the correct replacement part for my refrigerator?
Always verify by refrigerator model number. Use the model number on the appliance data plate and check the Whirlpool parts lookup or your service manual to confirm the part number. 4387562 (sometimes listed with a WP prefix) is common on older whirlpool/Maytag/Kenmore units, but compatibility varies by model and revision, so confirm before buying.
What are common symptoms of a failing 4387562 thermostat?
Typical signs include: the compressor never runs (thermostat stuck open), compressor runs continuously and fridge gets too cold (stuck closed), large temperature swings, or inability to hold a stable temperature despite correct settings. You might also notice clicking at the control or no response when changing the thermostat knob. These symptoms can also be caused by other components, so diagnosis is vital.
How can I test the 4387562 thermostat to see if it’s bad?
Basic safe tests: disconnect power to the fridge first. remove the control housing to access the thermostat and its terminals. With a multimeter set to continuity or ohms, set the thermostat to the coldest position – you should see continuity (closed). Warm the sensing element gently (room air or a warm cloth) or rotate the knob toward warm; the switch should open (no continuity). if it does not change state, the thermostat is highly likely defective. You can also check for correct incoming voltage to the thermostat (with power on and caution) to confirm upstream power is present. If unsure or uncomfortable with electrical testing, call a technician.
What should I be careful of when replacing the 4387562 thermostat?
Safety and wiring are important: unplug the refrigerator before starting. Photograph or label all wire connections before removal so you can reconnect them correctly.If the thermostat has a capillary sensing tube or bulb, handle it carefully – do not kink, bend sharply, or crush it, as that will damage the sensor.Use the exact replacement part and mount it the same way. After replacement, check that the refrigerator returns to normal operation and verify temperatures with a thermometer.
After I replace the thermostat it still doesn’t cool properly – what else could be wrong?
Thermostat replacement fixes onyl control problems. Other causes of cooling issues include a bad compressor start relay or capacitor, failed evaporator fan, frozen/blocked evaporator, restricted refrigerant (sealed system leak), dirty condenser coils, faulty thermistor/electronic control board, or door seal problems.If replacing the thermostat doesn’t resolve symptoms, further diagnosis of these components is necessary.
Does the 4387562 thermostat need calibration after installation, and how do I set temperatures?
The thermostat knob positions are usually relative (e.g., 1-7) rather than exact temperatures. After installation, set the knob to the manufacturer-recommended setting and allow 24 hours for temperatures to stabilize.Use a refrigerator thermometer placed in the main compartment to verify. Adjust the dial incrementally and allow time between changes to reach the desired temperature.
Where can I purchase the 4387562 thermostat and what is the expected cost?
You can buy the 4387562 from the Whirlpool parts website, authorized Whirlpool dealers, major appliance parts retailers, and reputable online marketplaces. Search by your refrigerator model or the part number (WP4387562/4387562). Prices vary by seller and OEM vs. aftermarket; expect a thermostat of this type to typically fall in a low-to-moderate price range (commonly around $10-$60 USD). Check return policies and seller reputation, and prefer OEM parts if possible.
To Conclude
the 4387562 Whirlpool Refrigerator Thermostat Temperature Cold Control plays a central role in maintaining consistent internal temperatures, protecting stored food, and supporting efficient operation of the cooling system. As a temperature-regulating component designed for compatibility with specific Whirlpool models, it helps coordinate compressor cycling and system response to maintain setpoint conditions, contributing to appliance reliability and energy performance.
Because temperature irregularities can stem from multiple causes, accurate diagnosis is essential before replacing the thermostat; correct fault identification reduces unnecessary part changes and ensures the underlying issue is addressed. When testing and service confirm the thermostat is defective, replacing it with the appropriate 4387562 control restores intended functionality and helps avoid food spoilage, excessive energy use, and further component stress. Entrusting diagnosis and replacement to qualified technicians or following manufacturer guidance promotes safe, effective repairs and long-term appliance performance.
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