The 279737 Whirlpool Dryer Load Timer is an electromechanical timer assembly used to sequence and control the timed functions of certain Whirlpool household dryers. as a rotary timer and switch package, it contains a small synchronous motor, internal cams and contact arrays that open and close circuits to direct power to the dryer’s drive motor, heating system, and auxiliary circuitry according to the selected cycle and elapsed time.
Inside the appliance,the load timer acts as the central sequencing device that coordinates major subsystems: it supplies and removes power to the drive motor and blower,energizes the heating element or gas valve/igniter circuit,and interfaces with thermostats,cycling thermostats or moisture sensors,and door and safety interlocks. The timer’s cams and switch contacts change state as the timer advances, moving the dryer through different stages (e.g., heat, tumble, cool down) and enabling or disabling associated safety and temperature control devices. Proper operation of the timer is thus essential for correct cycle progression and for safe control of heating and motor functions.
This article will examine the 279737 timer’s functional role and typical wiring/physical characteristics, discuss which dryer models and control platforms commonly use this part, identify common failure symptoms (such as failure to advance, stuck cycles, intermittent contacts, or burned contacts), and present practical troubleshooting steps including visual inspection, continuity and voltage checks, and checking the timer motor and cam movement. It will also cover replacement considerations-matching part numbers and harnesses, verifying wiring diagrams, and safety precautions during removal and installation-so technicians, engineers, and appliance owners can assess whether to repair or replace the timer and how to proceed reliably.
Table of Contents
- Function and Role of the Dryer Load Timer in Cycle Sequencing and Safety Interlocks
- How the 279737 Whirlpool Dryer Load Timer Works Inside the Appliance – Mechanical‑Electrical Interface and Signal Flow
- Common Failure Symptoms and Diagnostic Indicators of a Faulty Dryer Load Timer
- Replacement Considerations and Installation procedure for the 279737 Whirlpool Dryer Load Timer
- Q&A
- Key Takeaways
Function and Role of the Dryer Load Timer in Cycle Sequencing and Safety Interlocks
The 279737 Whirlpool Dryer Load Timer is an electromechanical timing switch that sequences power to the motor, heater, and auxiliary circuits by opening and closing multiple contact sets as its cam assembly rotates. In normal operation the timer advances only when the drive train or motor is operating, so the timer both coordinates timed events (heat on/off, cool-down, extended tumble) and enforces safety interlocks: if a door switch, thermal cutoff, or high-limit thermostat opens, the timer will either interrupt power to the affected circuit or prevent the timer from advancing into a hazardous state. The timer’s contact layout and cam profile determine compatibility with specific Whirlpool models; replacement units must match terminal numbering, shaft orientation, and the electrical ratings to preserve correct sequencing and interlock behavior.
- Symptoms of timer or contact failure: stuck on one cycle, no heat, continuous motor run, or failure to advance.
- Behavioral dependency: timer advancement often requires motor rotation or a solenoid actuation, so motor faults can appear as timer faults.
- Compatibility checks: verify terminal mapping, voltage rating (control circuit typically 120 VAC), and cam positions before replacing.
| Item | Description |
|---|---|
| Drive method | Motor-driven cam assembly that advances with drum/motor operation |
| Typical electrical | Control circuits at ~120 VAC; multiple isolated contact sets for heater/motor/solenoids |
How the 279737 Whirlpool Dryer Load Timer Works Inside the Appliance – Mechanical‑Electrical Interface and Signal Flow
The 279737 Whirlpool Dryer Load Timer is an electromechanical sequencing assembly that converts a selected cycle into timed electrical connections that control the dryer loads. Inside the module a geared drive and a synchronous timer motor rotate a shaft fitted with profiled cams; those cams actuate multiple switch contacts that route line power to the motor, heating element, and auxiliary circuits. Correct compatibility depends on matching the timer’s terminal layout, shaft orientation, and mounting position to the dryer model so that each cam closes the intended circuit at the correct point in the cycle.
Signal flow starts with incoming line power feeding the timer common and the drive motor; as the shaft advances, individual contact sets close to supply power to designated outputs for the programmed intervals. Typical fault symptoms reflect failures at the mechanical‑electrical interface: a worn or burned contact can interrupt or permanently energize the heater circuit, a seized drive prevents cycle advancement, and an incorrectly wired replacement will mis-route outputs. Technicians verify operation by confirming supply to the timer motor, observing contact closure with an ohmmeter while rotating the shaft or actuating the control knob, and comparing terminal functions to wiring diagrams to ensure proper sequencing.
- Motor output – powers the drum and blower circuits during tumble and cool-down.
- Heater/element output – supplies the heating circuit during active dry phases.
- Door/interrupt inputs – accept signals that force timer to stop or delay advancement.
- End‑of‑cycle signal – provides a switched output for buzzers or indicators.
| Item | Description |
|---|---|
| Timer cam/switch assembly | Profiles on the rotating shaft that mechanically close specific switch contacts to route line power to dryer loads. |
| Timer drive motor | small motor that advances the shaft at a controlled rate; requires line supply to progress the cycle. |
| Common and switched terminals | Common feed receives incoming line; individual switched terminals deliver that feed to the heater, motor, and accessories when their contacts close. |
Common Failure Symptoms and Diagnostic Indicators of a Faulty dryer load Timer
The 279737 whirlpool Dryer Load Timer is a mechanical/electromechanical control that sequences the dryer’s functions by advancing cams and switching circuits as the timer motor runs. It is the timing and switching hub for heat, motor, and auxiliary circuits on many Whirlpool and compatible Kenmore models; technicians should verify model and connector configuration before replacing the part. Internally the timer contains a small synchronous motor that advances a cam bank of multilayer contacts; failure modes can be electrical (open motor winding, loss of incoming voltage, intermittent contact) or mechanical (worn gears, stripped shaft, or seized cam). Understanding whether the timer is failing as a motor,switch bank,or mechanical assembly determines whether cleaning,adjustment,or replacement is required.
Common symptoms traceable to a faulty timer include the dryer not advancing through cycles, skipping specific functions, running continuously, or failing to engage heat at the appropriate step. Diagnostic indicators for a technician include absence of the characteristic clicking/advancing sound, visible burning or pitting on contact surfaces, and inconsistent or missing voltage at timer output terminals during operation. Practical tests are: verify presence of supply voltage to the timer motor when the drive motor runs, check for continuity across individual cam-switched circuits when the timer is turned to corresponding positions, and observe mechanical play or binding on the shaft. If the timer receives correct line voltage but the motor does not turn, the motor or gear train is defective; if the motor turns but circuits do not change state, internal contacts are faulty and replacement is recommended.
- No cycle advancement or frozen dial
- Specific functions (e.g.,heat,cool down) are skipped or never activate
- Dryer runs indefinitely or stops mid-cycle
- Intermittent operation or erratic cycle lengths
- Visible burning,pitting,or melted plastic on the timer housing
| Item | Description |
|---|---|
| Voltage check | Measure for ~120VAC at the timer motor lead while the dryer drive motor runs; absence indicates upstream supply or wiring issue. |
| Motor receives voltage but no advance | Indicates failed timer motor or stripped gear train; replacement of the timer assembly is typically required. |
| Motor advances but functions not switching | internal cam contacts are worn or pitted; verify continuity at cam positions and replace timer if contacts are open when they should close. |
Replacement Considerations and Installation Procedure for the 279737 Whirlpool dryer Load Timer
The 279737 Whirlpool Dryer Load Timer is an electromechanical sequencing device that controls the timing and switching of the dryer’s motor,heater,and accessory circuits via cam-operated contact banks driven by a small synchronous motor. In normal operation the cams close and open discrete spade-terminal contacts in a defined sequence to select timed dry, automatic dry, and cool-down functions; wear, burned contacts, or a seized drive motor produce symptoms such as skipped stages, continuous run, or no heating. Compatibility concerns for replacement include the terminal layout, mounting hole pattern, drive-shaft orientation, and matching harness connectors – installing a visually similar timer with a different terminal map can re-route heater or motor circuits and cause unsafe operation. Confirm the model cross-reference on the console or service sheet and compare wiring harness positions before final installation.
Remove mains power before starting, document and label every wire or take reference photos, then remove the old timer and compare physical and electrical pinouts; on reassembly align the timer drive so the cam profile starts in the same position as the original and torque mounting fasteners to avoid distortion of the housing. Use a multimeter to check continuity across expected contacts in several timer positions before applying full power; after installation, verify the dryer advances through all cycle positions and that the heater engages only in the positions specified by the wiring diagram. If replacing the timer does not correct observed faults such as no heat or a motor that doesn’t start, inspect thermostats, the heating element, and the centrifugal motor switch as the timer only sequences those circuits and does not provide over-temperature protection.
- Safety frist: disconnect power and label wires before removal.
- Verify part number, terminal layout, and drive-shaft orientation.
- Photograph original timer wiring for reference during reinstallation.
- Use a multimeter to check cam-contact continuity across cycle positions.
- After install, run a short test cycle and confirm sequencing and heater engagement.
| Item | Description |
|---|---|
| Terminal type | 1/4″ male spade terminals, arranged per manufacturer wiring diagram |
| Supply | Timer motor typically driven from 120 VAC synchronous motor circuit |
| Typical failure symptoms | Skipped stages, no advance, intermittent cycles, burned contacts |
Q&A
What is the 279737 Whirlpool dryer load timer and what does it do?
The 279737 is a dryer timer assembly used on some Whirlpool-family dryers. It is an electromechanical control that sequences the dryer functions – it routes power to the motor, heater, and other circuits in the proper order and for the correct duration when you select a cycle. In short, it acts as the cycle “brain” for dryers that use a mechanical timer dial.
What are common symptoms that the 279737 timer is failing?
Typical symptoms include: the dryer won’t advance through cycles or is stuck on one setting; the drum won’t tumble or heat in any setting; the timer makes unusual noises or hums; cycles stop partway through; or the timer knob turns freely with no effect. Intermittent operation or burnt contacts visible on the timer are also signs of failure.
How can I test the 279737 timer to confirm it’s bad?
First unplug the dryer. Locate and remove the control panel to access the timer. Consult the dryer’s wiring diagram for terminal identification. Use a multimeter set to continuity or ohms. Manually advance the timer shaft to different cycle positions and check for continuity between the timer terminals that the wiring diagram indicates should be connected in each position. If continuity is missing where it should be, or present where it shouldn’t, the timer is faulty. Also check the timer motor (if present) for open windings. Always follow the schematic and safety precautions when testing.
Can I repair the 279737 timer, or must it be replaced?
Most electromechanical timers are not practical to repair because they contain stamped contacts and a small motor or switch stack that wears out. Cleaning corroded contacts or replacing a worn switch is possible in some cases but typically not cost-effective or reliable. For safety and reliability, replacement with a new or OEM-reconditioned timer is the recommended approach.
How do I safely replace the 279737 timer?
unplug the dryer before starting. Remove the control panel or console to access the timer; remove the knob and mounting screws. Before disconnecting wires, take a clear photo or label each wire to ensure correct re-connection. Disconnect the wiring harness and remove the timer assembly, then install the new timer in reverse order. Verify knob alignment and that all connectors are seated. Restore power and test multiple cycle selections. If you’re not comfortable with electrical work, hire a qualified technician.
Do I need to program or calibrate the dryer after installing a new 279737 timer?
No special programming is required for a typical electromechanical timer. Once installed and wired correctly, the timer should operate like the original. Ensure the timer knob is indexed properly so the dial positions align. If the dryer uses any electronic control modules in conjunction with the timer, follow the manufacturer’s service instructions – but a mechanical timer itself does not require calibration.
How do I make sure I order the correct replacement timer for my dryer?
Use the dryer’s model and serial number from the data plate (usually on the door frame or dryer cabinet) to look up parts. Cross-reference that model number on Whirlpool’s parts site, authorized parts distributors, or the parts diagram for your machine to confirm 279737 is the correct part for your model. Do not rely only on visual match; wiring/terminal layouts can differ. If in doubt, contact Whirlpool support or an appliance parts dealer with your model number.
What should I expect in cost and time to replace the 279737 timer?
Parts cost for a replacement timer can vary widely depending on source and whether it’s new or rebuilt; a typical range is roughly $60-$200. Labor to replace the timer is generally 0.5-1.5 hours for a technician,so service rates vary by region. Total cost will depend on part price,diagnostic fees,and local labor rates. if you do the replacement yourself, budget about 30-90 minutes plus basic hand tools.
Key Takeaways
The 279737 Whirlpool dryer load timer is a central control component that coordinates the sequence and duration of a dryer’s cycles. By advancing settings and activating heating and motor circuits at the proper times, this timer directly affects drying performance, energy use and the overall reliability of the appliance. When functioning correctly, it helps ensure consistent results and safe operation across a range of load types and cycle selections.
Because the timer interacts with multiple systems in the dryer, symptoms such as irregular cycle progression, failure to start or to advance, or unexpected shutoffs can indicate a timer fault but may also result from other components like thermostats, heating elements or door switches. Proper diagnosis-using manufacturer documentation, diagnostic procedures and appropriate electrical testing or professional service-is crucial to accurately identify the root cause and avoid unnecessary parts replacement.
When testing confirms the 279737 timer is defective,timely replacement with the correct part restores cycle control,improves performance and helps prevent further stress on related components. Whether handled by a qualified technician or an experienced DIYer following safety guidelines and manufacturer instructions, correct diagnosis and replacement preserve appliance reliability and operational efficiency over the long term.
Professional Appliance Service
If your appliance requires professional diagnosis or repair, visit
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For local appliance service information see
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Replacement parts for many appliance models can also be found at
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