279737 Whirlpool Dryer Load Timer is an electromechanical sequence control used in Whirlpool tumble dryers to advance and regulate drying cycles. It is indeed a rotary timer assembly (frequently enough called a load timer or cycle timer) that provides timed switching of electrical circuits within the dryer control system, coordinating power to the motor, heating circuit, and ancillary sensors according to the selected program.
Inside the appliance, the load timer acts as a central timing and sequencing node that interfaces with the drive motor, heating element or gas valve, door and start switches, thermostats, and moisture or temperature sensors where fitted. As the timer shaft rotates it closes and opens internal cams or electronic contacts to energize or de-energize circuits in the correct order; this sequencing determines when the drum turns, when heat is applied, when cool-down occurs, and how long each phase lasts. The component is typically mounted behind the control console on household Whirlpool front- and top-loading dryers and is crucial because incorrect timing or failed contacts can prevent cycle advancement, disrupt heating control, or create unsafe operating conditions.
In this article you will find a technical overview of the 279737 load timer’s function and internal operation, guidance on compatibility and identifying the correct replacement, common failure symptoms and diagnostic checks, practical troubleshooting steps including electrical continuity and mechanical inspection, and considerations for safe replacement and calibration. The content is intended to help technicians, engineers, and informed appliance owners perform systematic diagnosis and make informed decisions when servicing or replacing the timer.
Table of Contents
- Function and Role of the Dryer Load timer in Whirlpool Cycle Control and Safety Systems
- How the 279737 Whirlpool Dryer Load Timer Works Inside the Appliance: electrical Schematics and Mechanical Cam Operation
- Common Failure Symptoms and Diagnostic Indicators for the Load timer
- Replacement Considerations, Model Compatibility, and Installation Procedures for the 279737 Unit
- Q&A
- To Wrap It Up
Function and Role of the dryer Load Timer in Whirlpool Cycle Control and Safety Systems
The 279737 Whirlpool Dryer Load Timer is an electromechanical timing assembly that sequences the dryer’s drive motor, heating circuits, and auxiliary outputs by rotating a cam stack to open and close multiple internal contacts. Its internal synchronous motor advances the cams at a controlled rate so that each circuit receives power at the correct portion of the selected program (timed dry, auto dry, cool-down and signal). The timer coordinates with thermostats,high-limit cutouts,and moisture-sensing circuits but does not replace those safety devices; heater circuits and thermal fuses are typically wired in series with the timer contacts so an over-temperature condition will open the safety device independently of the timer position. Proper replacement requires matching the terminal layout, cam profile, and mounting orientation to the dryer model to preserve sequencing and electrical connections.
Technicians diagnose timer-related faults by observing cycle behavior, verifying voltage to the timer motor, and checking continuity across the cam-operated contacts according to the wiring diagram. Common symptoms of a failing timer include failure to advance, erratic stopping, incorrect cycle timing, or loss of specific functions (for example, heat on some timer positions but not others). Basic service checks include confirming harness connections, measuring the timer motor resistance, and inspecting cam contacts for wear or burnt surfaces; if the timer motor receives correct line voltage but does not turn, the timer assembly is the likely fault. Use the dryer’s wiring schematic and a multimeter to isolate the timer from downstream safety components before replacing the module.
- Symptoms: timer won’t advance, stops mid-cycle, or specific functions fail in particular timer positions.
- Swift checks: verify line voltage to the timer motor, continuity of cam contacts per schematic, and connector pinout match for replacements.
- Compatibility note: replace with identical part number or approved cross-reference to preserve cam sequencing and terminal arrangement.
| Item | Description |
|---|---|
| Drive | Synchronous motor that advances cam stack; measure for continuity and apply proper line voltage for functional test. |
| Cam switches | Multiple sets of contacts controlled by cam lobes; inspect for pitting or open circuits corresponding to faulty functions. |
| Diagnostics | Use wiring diagram to isolate timer; check motor voltage, continuity across contacts in each position, and ensure safety devices are not open. |
How the 279737 Whirlpool Dryer Load Timer Works Inside the Appliance: Electrical Schematics and Mechanical Cam Operation
The 279737 Whirlpool Dryer Load Timer is a motor-driven electromechanical sequencing device that routes mains voltage through a set of cam-operated contacts to control the dryer’s heater, drive motor and auxiliary circuits. Inside the appliance the synchronous timer motor turns a shaft with multiple cams; each cam lobe closes or opens one or more stationary contacts at defined angular positions to provide the timed sequence for heat cycles, cool-down and drum rotation. Because the timer is a direct replacement part for specified Whirlpool models,its terminal layout and cam sequencing are designed to be compatible with the original wiring harness and the appliance’s control logic,so correct orientation and secure connector seating are required for reliable operation.
electrically, the timer serves as a mechanical logic element in the dryer schematic: the main line (L1) is routed through timer contacts to the heating element, motor, and cycle-selector circuits while the neutral completes each branch. Wear of cam lobes or pitting on contact surfaces degrades conduction and can produce intermittent heating,failure to advance,or audible arcing; practical troubleshooting therefore focuses on verifying 120 VAC at the timer motor when a cycle is selected,and checking continuity across the heater and motor contacts when the timer is in the corresponding positions. Such as, if the drum tumbles but there is no heat, a technician should inspect the heater contact on the timer while the timer is in a heat position; if the timer will not advance, confirm the timer motor receives supply voltage before replacing the assembly.
- Function: cam-driven sequencing of power to heater, drive motor and accessories.
- behavior: audible clicks at cam transitions; progressive contact engagement for timed cycles.
- Diagnostics: verify 120 VAC to timer motor, continuity of contacts in cycle positions, inspect for burned or stuck contacts.
- Compatibility: designed as a direct replacement for specified Whirlpool models-match terminal layout and mounting orientation.
| Item | Description |
|---|---|
| Rated supply | 120 VAC timer motor and contact switching on line voltage circuits |
| Mechanical parts | Multiple cam lobes on a driven shaft actuating stacked contact sets |
| Common fault | Worn/pitted contacts causing no heat, intermittent operation, or failure to advance |
Common Failure Symptoms and Diagnostic Indicators for the Load Timer
The 279737 Whirlpool Dryer Load Timer is an electromechanical sequencing device that routes line voltage to the motor, heater and auxiliary circuits for each phase of a drying cycle. failure of the timer’s drive motor, worn cam lobes, or pitted internal contacts will change how those circuits are energized and produce symptoms that mimic other component faults. Technicians should remember the timer does not generate power but switches it; thus a non-advancing cycle, heating that does not follow the dial position, or intermittent operation can indicate worn timer contacts or a stalled timer motor rather than a thermostatic or element failure.
Diagnosing this part relies on observing behavior under load and confirming expected electrical continuity and voltage at the timer terminals. Measure for line voltage at the timer input and verify that the timer provides switched voltage to the heater and motor terminals as the dial advances; if the input is present but the timer does not rotate or its outputs do not change state, the timer mechanism or its internal motor is suspect.Visual indicators such as burnt or fused terminals, excessive arcing, or a faint burning odor are practical signs of contact failure. Verify the part number and terminal layout against the dryer wiring diagram before replacement to ensure compatibility with the specific Whirlpool model and harness configuration.
- Dryer does not advance through cycles or stays on a single setting.
- Heater or motor runs continuously or not at all despite correct dial position.
- intermittent operation, audible clicking, or visible burn marks on timer terminals.
- No rotation of the timer dial while supply voltage is present at the timer input.
| Item | description |
|---|---|
| Continuity check | With the dial in a given position, check continuity across the corresponding timer contacts; open contacts that should be closed indicate internal failure. |
| Voltage verification | Confirm line voltage at the timer input and that switched outputs receive expected voltage during cycle transitions (compare to service manual values). |
Replacement Considerations, model Compatibility, and Installation Procedures for the 279737 Unit
The 279737 Whirlpool Dryer Load timer is an electromechanical timing switch that sequences power to the dryer’s motor, heating circuit, door switch, and other load devices according to the selected cycle. Inside the unit, cam-operated contacts close and open specific mains-voltage circuits as the timer advances, so worn or burnt contact segments will produce symptoms such as failure to advance between cycle stages, intermittent heat, or loss of motor run during portions of a cycle. Compatibility depends on the exact terminal layout,shaft profile,and mounting pattern rather than only the part number; technicians must confirm that the replacement matches the OEM connector arrangement and physical mounting before installation to avoid mismatched connections that can create unsafe wiring conditions or improper sequencing of loads.
Replacement requires basic electrical troubleshooting and careful mechanical alignment. Before removing the original timer, record knob position and terminal wiring, then verify switch segment continuity with a multimeter while stepping the timer shaft through representative positions (for example, checking continuity to the heater terminal when the control is in a heating interval).During installation, disconnect power, transfer any retaining clips or spacers, secure the timer to the control bracket, reconnect labeled wires to the corresponding terminals, and perform a complete set of cycle tests (no-heat, timed dry, automatic dry if applicable) to confirm proper sequencing. If continuity checks or visual inspection reveal burned contacts or melted plastic, replace the timer with an exact or manufacturer-approved equivalent rather than attempting to rewire or bypass contacts.
- Safety: Disconnect power at the breaker before any work.
- Document knob position and wire locations; label wires before disconnecting.
- Verify terminal layout and shaft type on the replacement part before installation.
- Use a multimeter to test switch continuity in multiple shaft positions prior to final assembly.
- After installation, run multiple cycle modes to confirm proper sequencing of motor and heater circuits.
| Item | description |
|---|---|
| Part | 279737 Whirlpool Dryer Load Timer - electromechanical cam switch for cycle sequencing |
| Operating Voltage | Typical 120 VAC mains switching (verify label on unit) |
| Terminals | Multiple spade terminals; confirm count and layout against OEM harness |
| Mounting | Panel-mounted with shaft and retaining hardware; transfer spacers/knobs as required |
Q&A
What does the 279737 Whirlpool dryer load timer do?
The 279737 is the electromechanical timer assembly that sequences a dryer’s cycles. It routes power to the motor, heater/igniter, and various switches/thermostats at the correct times so the drum, heating and cool-down phases occur in the chosen program. It also contains the mechanism that advances the timer and stops the cycle when finished.
What are common symptoms of a failing 279737 timer?
Typical signs include the timer not advancing or getting “stuck,” the dryer not starting, intermittent or no heat, a cycle that won’t finish, or electrical arcing/sparking at the control.Because the timer routes power to multiple components, failures can produce several different operational faults.
How can I test the 279737 timer myself?
Only attempt tests if you are cozy working with electrical appliances. First disconnect power. Remove the control panel to access the timer and consult the dryer’s wiring diagram/service sheet to identify timer terminals. Use a multimeter to check continuity of the timer contacts for the selected cycle positions (verify that the correct contacts close/open as the timer is advanced). Also check the timer motor windings for continuity. If contacts don’t change state or the motor winding is open, the timer is faulty.As wiring and terminal labels vary by model, always follow the model-specific schematic.
Does a bad 279737 timer cause a dryer to have no heat?
Yes - if the timer fails to supply power to the heating circuit (heater element in electric dryers or ignition/valve circuit in gas dryers) the dryer will not heat. However, no-heat can also be caused by a blown thermal fuse, failed thermostats, an open heating element/igniter, or safety cutouts. Troubleshoot the heating circuit step-by-step rather than assuming the timer is the only possible cause.
Can I repair the 279737 timer or should I replace it?
most timer failures are internal and not practical to repair; replacement with a correct OEM part is the recommended solution. In limited cases technicians might clean mildly burned contacts, but this is a temporary fix and not advisable for safety and reliability reasons. Buy a direct replacement that matches your dryer model number or approved cross-reference.
How do I replace the 279737 timer safely?
Turn off and unplug the dryer (or shut off gas and unplug for gas models). Remove the control knobs and control panel to access the timer. Photograph or label all wires before disconnecting so you can reconnect them correctly. Remove mounting screws, swap the old timer for the new unit, reattach wires, reassemble the control panel, and restore power. After replacement, run a test cycle to verify proper operation. If you’re not comfortable with electrical work, hire a qualified technician.
Is the 279737 timer compatible with different Whirlpool or kenmore models?
Compatibility depends on the dryer model and production date. The same part number is used on a range of models,but you must verify compatibility by checking your dryer’s model number and the OEM parts list or a reputable parts lookup. Do not rely solely on visual similarity; wiring connectors and cam profiles can differ between models.
What tools and time should I expect when replacing the 279737 timer?
Typical tools: Phillips and flat screwdrivers, nut drivers or Torx drivers (depending on fasteners), a multimeter for testing, and tape/labels for wire identification.Replacement time is usually 30-60 minutes for someone with basic appliance repair skills. Prioritize safety: always disconnect power first and follow model-specific service instructions.
To Wrap It Up
The 279737 whirlpool Dryer Load Timer serves as a central control component that sequences and times the dryer’s functions according to user selections. By coordinating the motor, heating element, and accessory circuits, the timer helps ensure that drying cycles run for appropriate durations, contributes to energy-efficient operation, and supports safe performance across a range of fabric types and load conditions.
Because symptoms such as failure to progress through cycles, erratic timing, or persistent heating can indicate timer malfunction, accurate diagnosis is important before replacing parts. Confirming the timer as the root cause-through inspection, electrical testing, and review of service information-helps avoid unnecessary repairs. When replacement is required,installing the correct part and following manufacturer instructions or qualified service practices restores reliable operation,preserves safety,and helps extend the appliance’s useful life.
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
.
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