279737 Whirlpool Dryer load Timer is a timing/control assembly used to sequence and time dryer cycles in compatible Whirlpool laundry dryers. It is an electromechanical control that actuates internal contacts (often via a rotary cam or indexed switch mechanism) to route mains voltage to the heater, motor, blower and othre subsystems according to the selected cycle. As a discrete control component,it provides the time-base and contact switching that coordinate the mechanical and thermal operations of the appliance.
Inside the dryer the load timer governs the order and duration of events such as drum rotation, air heating, and cooling, and it interfaces with user inputs, safety interlocks (door switch, thermal cutouts, thermal fuses), and sensor inputs where present. The timer effectively distributes power to the heater element or gas valve, the drive motor and the blower motor at the appropriate intervals and prevents conflicting operations by opening and closing specific contact sets. It is typically mounted behind the control panel and wired into the machine’s main control harness so that user selections translate into timed electrical actions.
In this article you will find a technical overview of how the 279737 timer functions, guidance on verifying compatibility with specific Whirlpool models and wiring diagrams, common failure symptoms to recognize (such as: cycle not advancing, no heat when the timer should call for it, intermittent contacts or burned terminals), step‑by‑step troubleshooting methods including continuity and voltage checks, and practical replacement considerations such as part matching, connector orientation, mechanical alignment and basic safety precautions to observe during diagnosis and swap-out. The goal is to provide technicians, engineers and learned owners with the diagnostics and decision points needed to determine whether the timer is the root cause and how to replace it correctly when necessary.
Table of Contents
- function and Role of the Dryer Load Timer in Cycle Sequencing and Control
- How the 279737 Whirlpool Dryer Load Timer Works Inside the Appliance and Interfaces with Control Circuits
- Common Failure Symptoms and Diagnostic Indicators for Load-Timer Malfunction
- Compatibility, Replacement Considerations and Installation Procedures for the 279737 Whirlpool Dryer Load Timer
- Q&A
- to sum up
Function and Role of the Dryer Load Timer in Cycle sequencing and Control
The 279737 Whirlpool dryer Load Timer is the sequence control that directs mains power to the dryer’s motor, heating elements, and auxiliary circuits according to the selected program. In mechanical implementations it uses a motor-driven cam stack and switching contacts; in electronic implementations it provides the same logical sequencing via solid-state relays or driver outputs. The timer receives inputs from the user selector, door switch, thermostats and any moisture or temperature sensors, and it advances the program state either on elapsed time or when sensor thresholds are met.Replacement and compatibility are dictated by terminal arrangement,shaft orientation and cam profile or firmware mapping so that each contact closes in the correct order for the specific Whirlpool chassis and cycle configuration.
From a troubleshooting and operational outlook the load timer’s primary behavior is to present discrete contact closures in a defined order; degraded contacts, worn cams, or a failed drive motor/clock will cause symptoms such as failure to advance, incorrect heat timing, continuous tumble, or intermittent operation. Technicians verify timer function by applying power to the timer motor or clock circuit and checking for correct voltages and continuity at the mapped terminals while stepping through a program; observing which terminals energize during specific cycle stages confirms whether the problem is in the timer or in upstream inputs (thermostat, selector switch, door switch). Practical examples include replacing a timer when contact burn results in no heat during the timed heat stage, or confirming that the timer advances only when the motor receives power, which isolates a motor or centrifugal switch fault from a sequencing fault.
- Typical features: multi-contact sequencing,integration with sensor inputs,and either motor-driven or electronic timing.
- Common symptoms of failure: stuck cycles, no advancement, incorrect heating periods, or intermittent contacts.
- Key checks: presence of control voltage to the timer, continuity across expected contact pairs during cycle advancement, and physical inspection of cams/terminals.
| Item | Description |
|---|---|
| Function | Sequence and route power to motor, heater, and control inputs according to selected cycle. |
| Interface | Terminals for selector switches, door switch, thermostats and sensor inputs; must match original layout for swap-in replacements. |
| Diagnostic check | Measure supply voltage and continuity at timer terminals while advancing the cycle; verify contact closures map to the wiring diagram. |
how the 279737 Whirlpool Dryer Load Timer Works Inside the Appliance and Interfaces with Control Circuits
The 279737 Whirlpool Dryer Load Timer is a rotary electromechanical sequencing device that uses a small synchronous motor and a set of cam-operated contacts to route line voltage to the dryer’s heater, drum motor, and auxiliary circuits in a timed order. Inside the assembly a drive motor turns a cam stack with multiple lobes; as the cam rotates, precision-milled followers open and close discrete microswitches that determine which circuit is energized at each position of the cycle. This arrangement provides discrete time intervals and dwell positions (e.g., timed dry, cool down, and off) without relying on software, so the timer’s mechanical cam profile directly defines cycle length and transition points and must match the control scheme of the washer/dryer harness for correct operation.
- Interfaces: multi-pin terminal block to the main wiring harness, cam-driven switch contacts, and a driven shaft that may include a friction or indexed detent.
- Behavior: governs sequencing and power routing; failure typically produces no advancement, stuck cycles, or intermittent heater/motor power.
- Practical check: measure continuity across terminals while manually advancing the shaft to confirm contact switching and verify motor rotation at line voltage.
| Item | Description |
|---|---|
| Drive motor | Synchronous or shaded-pole motor that advances the cam at a fixed rate under line voltage. |
| cam-operated contacts | Multiple switch positions that open/close circuits for heater, motor, and selector functions. |
| Terminal block | Multi-pin connector providing the electrical interface to the dryer’s control harness; must match connector layout on replacement units. |
When replacing or troubleshooting a 279737 Whirlpool Dryer Load Timer, verify physical compatibility beyond mounting-confirm the terminal numbering, cam profile (sequence of closed contacts), and motor supply rating match the original part to avoid mis-sequencing or incorrect dwell times. For example, a technically correct swap requires the same connector pinout and identical cam logic so that selecting “Timed Dry” actually routes power to the heater for the intended interval; technicians commonly bench-test the timer by applying line power to the motor (observing safety precautions) and checking contact closures with a multimeter as the shaft is advanced. In service diagnostics, symptoms such as a dryer that runs but never heats, a cycle that does not advance, or random loss of selected functions point to worn cams, burned contacts, or a failed drive motor in the timer assembly rather than to control board faults.
Common Failure Symptoms and Diagnostic Indicators for Load-Timer Malfunction
The 279737 Whirlpool Dryer Load Timer is an electromechanical timing assembly that sequences power to the dryer’s subsystems by switching multiple contact sets as its internal cam/motor assembly advances. In normal operation the timer provides timed connection points for the drive motor,heating circuit,and other controls so that each stage of a cycle receives power in the intended order. Mechanical wear, burned or pitted contacts, a seized timer motor, or broken cam lobes change that sequencing and produce definite, repeatable symptoms. Technicians should confirm part number compatibility and the physical orientation of the timer and knob indexing before replacement, as the correct mechanical alignment is required to ensure the cams engage the contacts at the correct times during a cycle.
- No cycle advancement: the drum continues to run or the timer knob rotates without changing cycle state.
- No heat or intermittent heating even though the dryer motor runs and the thermostat is intact.
- Burning odor or visible arcing/corrosion at timer contacts.
- Timer motor is silent or stalls; knob feels loose or skips detents.
- Intermittent operation where functions engage sporadically and not according to selected cycle.
Diagnosis relies on isolating the timer from upstream and downstream faults: verify incoming control power is present at the timer input, then backprobe outgoing timer terminals while advancing the cycle to see which contacts close or open. Use a multimeter to check continuity across contact sets and watch for abrupt opens under load that indicate pitting.If a contact fails to make continuity when its cam position indicates it should, the timer is at fault; if the timer receives the correct control voltages but the motor does not turn, the timer motor or its internal drive is defective. Also consider that control boards, door switches, or thermostats can produce similar symptoms, so confirm switching behavior at the timer before replacing it.
| Item | Description |
|---|---|
| Visible contact damage | Pitted, burned, or welded contacts indicate the timer will fail to switch reliably and should be replaced. |
| Continuity check | Expected: continuity across a contact when its cam indicates a closed position; absence indicates a faulty contact or broken actuator. |
| Compatibility note | Replace with part 279737 Whirlpool Dryer Load Timer only after confirming model fit and correct knob/timer orientation to preserve cycle timing. |
Compatibility, Replacement Considerations and Installation Procedures for the 279737 Whirlpool Dryer Load Timer
The 279737 Whirlpool Dryer Load Timer is an electromechanical timing device that sequences the dryer’s motor, heating circuits, and accessory interlocks by advancing a cam-driven switch bank. The timer uses a small synchronous or shaded-pole motor to rotate a shaft with shaped cams that make and break multiple spade-terminal contacts at defined intervals; these contact closures route line voltage and control signals to the heater,drive motor,and thermostats. Compatibility is determined by the physical shaft orientation and diameter, mounting boss locations, the number and assignment of spade terminals, and the cam profile that controls contact timing. When evaluating a replacement, match the terminal ID and mechanical mounting exactly or verify a wiring map and terminal-to-function continuity before committing to installation.
Replacement and installation require methodical verification of electrical and mechanical interfaces. Before removal, document or photograph all wire connections and label wires by terminal; then disconnect power and confirm there is no line voltage at the timer harness. On the bench or in-situ, use a multimeter to map continuity between terminals as the timer shaft is advanced to confirm contact sequencing matches the dryer’s wiring diagram. During installation align the timer shaft and selector knob position so the cam profile starts in the correct position, fasten the mounting points to avoid drivetrain misalignment, and perform a controlled test cycle to verify that the heater, motor, thermostats, and safety interlocks operate in their expected sequence.
- Confirm part number and compare terminal layout to the dryer wiring diagram.
- Label and photograph all wiring before disconnection.
- Disconnect power and verify absence of mains at the harness.
- Map contact continuity while advancing the shaft to verify function assignments.
- Secure mechanical alignment and run a short test cycle to validate operation.
| Item | Description |
|---|---|
| part | 279737 Whirlpool Dryer Load Timer – electromechanical cam switch assembly |
| Function | Sequences motor, heater and interlocks via timed spade-terminal contacts |
| Typical checks | Terminal layout, shaft orientation, mounting boss positions, continuity mapping |
Q&A
What is the Whirlpool 279737 dryer load timer and what does it do?
The 279737 is an OEM control timer assembly used on certain Whirlpool-family electric dryers.it is an electromechanical timer that directs power to the dryer’s motors, heating element, and accessory circuits according to the selected cycle and elapsed time. In short, it advances the cycle and closes the timed switch contacts that control drying, tumbling and heating functions.
what symptoms indicate the 279737 timer is failing?
Common symptoms include the dryer not advancing through cycles, the drum not tumbling or stopping mid-cycle, the timer knob not turning even though power is present, intermittent or no heat when other components test OK, or visible burning/smell/heat from the timer area. Because other parts (door switch, thermal fuse, motor, thermostats) can produce similar symptoms, verify those first.
How can a technician test the 279737 timer to confirm it’s bad?
Start by removing power to the dryer and visually inspecting the timer for burnt contacts or melted plastic. With the dryer powered and exercising safe procedures, use a multimeter to check for 120 VAC at the timer motor terminals while a cycle is started (many dryer timer motors run on line voltage). Also test continuity across the timer switch contacts in different timer positions (with power off) using the timer’s wiring diagram or continuity chart. If the timer motor does not receive voltage during a run or if specific switch contacts are open when they should be closed, the timer is highly likely faulty.
Can I replace the 279737 myself and what precautions should I take?
Yes, an experienced DIYer can replace the timer, but always disconnect electrical power before beginning. Label or photograph wire connections before removal so you can reconnect them correctly. Use appropriate hand tools and avoid forcing connectors. If you are not comfortable working on mains-powered appliances, hire a qualified technician. Also verify that the replacement part number matches your dryer model.
How do I know if the 279737 is the correct replacement for my dryer model?
Parts can vary by model and production date. Confirm compatibility by checking your dryer’s model and serial number (usually on the door or cabinet), then search that model against the OEM part number 279737 on the manufacturer’s parts site or an authorized parts dealer.Never rely solely on physical similarity-cross-reference part numbers or the model-specific parts list.
Will replacing the 279737 fix heating problems?
Not always. The timer routes power but the heating circuit is also controlled by the thermal fuse, high-limit thermostat, cycling thermostat, and the heating element itself.If those components are faulty, replacing the timer will not restore heat. Troubleshoot the heating components (check continuity on thermal fuses/thermostats and resistance of the heating element) before or in parallel with testing the timer.
What tools and parts are typically needed to replace or test the 279737?
Common tools: multimeter, screwdrivers or nut drivers for control panel screws, needle-nose pliers, and wire labels or tape for marking leads.Replacement parts: the 279737 timer (OEM recommended) and possibly new mounting hardware or control knob if damaged. Have the dryer model number available when ordering the part.
How long should a dryer timer like the 279737 last, and what causes it to fail?
A properly used dryer timer can last many years, but typical life varies with usage and conditions. Common causes of failure are worn mechanical contacts from repeated cycling, heat and dust buildup, moisture, or electrical surges that damage the motor or switch contacts. Regular cleaning of lint and ensuring proper venting can definitely help prolong the timer’s life.
to sum up
The 279737 Whirlpool dryer Load Timer serves as a central timing and sequencing component that governs cycle advancement, heat and drum operation coordination, and overall program execution. Its proper function directly affects drying performance, energy efficiency, and the consistency of selected cycles, making it an crucial part of dependable dryer operation.
Accurate diagnosis is essential to determine whether the timer is the root cause of a drying issue or if another component is at fault; this reduces needless parts replacement and downtime.When testing indicates the 279737 timer is defective, timely replacement with the correct part and proper installation restores reliable cycle control and helps prevent secondary problems associated with intermittent timing failures.
understanding the role of the 279737 Whirlpool Dryer Load Timer and addressing faults through careful diagnosis and appropriate replacement contributes to safe, efficient, and long-lasting dryer performance. Adhering to manufacturer specifications and using qualified service resources will maximize the likelihood of a accomplished repair.
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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