279737 Whirlpoolâ Dryer Load Timer is an electromechanical timing assembly used to sequence âand control the operating cycles ofâ a clothes dryer. The part consists âŁof a small synchronous motor, a cam-driven switch bankand a mounting interface that together⤠provide timed closingâ and â¤opening of electricalâ circuits; it is indeed a service-replaceable control component rather than a sensor or electronic control board. Understanding the âbasic construction and intended⤠function of the 279737â helps distinguish timer-related faults from⣠issues caused by motors,â heating elementsor electronic â˘controls.
Inside the appliance the timer governsâ the chronological progression of dryer functions by routing⢠power to â¤subsystems such as the â˘drive motor, heating element â˘or gas âvalveand auxiliary components like the drum light or â˘moisture sensing circuit where present.It typically mounts in the control console or behind the front panel and âŁinterfaces with the main wiring âharness, thermostats, doorâ switchand, in gas models, the gas valve circuit. Because the timer directly controls power distribution and cycle advancement, its correct operation is integral âtoâ safe, predictable dryer behavior and to the coordination of thermal â˘and mechanical⤠safety interlocks.
Inâ this articleâ you will find a technical overview of the 279737’s intended function and typical electrical âŁand mechanical characteristics, guidance on verifying compatibility withâ specific Whirlpool models, common failure symptoms to recognize, practical troubleshooting checks â¤a technician can performand considerations for safe replacement and reassembly. The coverage is framed for technicians, engineers,â and informed appliance owners who need to diagnose timer-related faults and make âinformed decisions about repair or replacement.
Table of contents
- Functional Role and System Control Responsibilities of the Dryer Load Timer
- How the 279737 Whirlpool Dryer Load Timer Works: Internal Mechanisms, Cam Contacts,â and âElectrical interfaces
- Common Failure Modes and Diagnostic Symptoms of the Load Timer
- Replacement Considerations, Model Compatibilityand stepâbyâStep Installation for the 279737⢠Timer
- Q&A
- In Retrospect
Functional Role and System control Responsibilities of the Dryer Load Timer
The 279737 Whirlpool Dryer Load Timer is anâ electromechanical sequencing device that governs cycle progression and power distribution in rotary-timer â˘Whirlpool dryers. Internally it uses a small synchronous timer motor driving cams and a set of switching contacts; as⣠the⣠motor advances the âŁcam stack, contacts close and open to energize the heating element, motor, âand solenoids according to the selected cycle. The part’s physical terminal layout and⢠cam configuration determine âŁcompatibility with specific models, â¤so replacementâ requires matching the part ânumber and verifying that the terminal arrangement and mounting points align with the dryerâ chassis and harness.
- Sequencing: advances⢠cams to switch heater, motor, â¤and end-of-cycle indicators in the correct order.
- Interfacing: works with thermostats, fuses, start switches, âand moisture sensors by providing switched power paths.
- Behavioral symptoms: a timer that fails will either âleave the âŁdryer running without advancing cycles or stop the operation entirely if its motor or contacts fail.
Technicians use standard diagnostic checks to isolate timer faults: verify the timer motor receives line voltage during a running cycle, inspect cam-operated contacts for wearâ or âŁpittingand confirm that external safety âlimits â(thermal cutouts, high-limit thermostats) are not preventing advancement. âFor example, a dryer that tumbles but never progresses from timed dry to⤠cool-down frequently enough indicatesâ a seized cam or failed timer motor; if 120 VAC is presentâ at the timer motor and the motor does not rotate, replacement of âthe 279737 assembly is typically required. This âtimer is intended for rotary-control systems and is not âcompatible with electronic control boards that emulate timing functions in software.
| Item | Description |
|---|---|
| Function | Electromechanical sequencing of heater, motorand cycle indicators |
| Drive method | Synchronous timer motor drivingâ cam-operated contacts |
| Typical control voltage | Line-level⤠(e.g., 120 VAC) to⢠the timer motor â˘and switched loads |
| Compatibility | Direct replacement in rotary-timer Whirlpool dryers; match part number/terminal layout |
How the 279737 whirlpool dryer Load Timer works: Internal Mechanisms, Cam Contactsand Electrical Interfaces
The 279737 Whirlpool Dryer Load Timerâ is a âcam-driven rotary timing assembly that sequences the dryer’s heat and motor circuits using an internal timer motor, gear reductionand a set of cam lobes that operate microswitches. Inside the molded housing the timer motor turns a gear train that advances the cam profile; as each cam lobe rotates, it actuates individual switches that route âline â˘voltage to the drive motor, heating elementand auxiliary circuits âaccording to the selected cycle. Proper function depends on the cam âgeometry, contact alignmentand terminal layout,⤠so replacement units mustâ match the dryer’s wiring diagram and terminal map to maintain correct sequencing â¤and safety interlocks.
Failures are typically mechanical or âŁcontact-related: â¤worn cam followers, pitted or burned contacts, âor a weak timer motor produce symptoms such⣠as failure to advance, intermittent heatingor incorrect cycle timing. Useful diagnostic â¤checks include visual inspection of contact surfaces, continuity tests⣠across switch contacts while manuallyâ advancing the timerand verifying âthat the timer motor receives⣠the expected control voltage. Such as, if the dryer tumbles but does not heat, measure continuity between the timer heat terminal and the heater circuit at the moment theâ cam should close; absence of continuity âisolates⣠the problem toâ theâ timer contact or cam rather than âthe heating element or thermostat.
- Common symptoms: no advance, stuck on a position, intermittent heator erratic cycle timing.
- Rapid⤠checks: visual contact condition, âcontinuity across contacts during manual advanceand presence of proper voltage to the timer motor.
- Compatibility: confirm terminal mapping and âcam âfunction against the dryer schematic beforeâ replacing the part.
| Item | Description |
|---|---|
| Mechanism | Cam-driven rotary switch actuated by a synchronous or shaded-pole timer motor and gear train. |
| Contacts | Multiple cam-operated microswitches route mains⢠to motor, âheaterand accessory outputs; wear causes arcing andâ loss of function. |
| Electrical âinterface | Terminal block provides connections for line, neutral, motor feed, heater feedand control inputs; terminal mapping must match dryer wiring. |
Common Failure Modes and Diagnostic Symptoms of the Load Timer
The 279737 Whirlpool Dryer Load Timer⣠is an electromechanical sequencing device that routes line voltage to the motor, heater,⢠and ancillary circuits as the cycle dial advances. Internally it uses a rotating cam stack and multiple switch contacts to⤠change wich circuits are energized at each position; failure of a⢠contact or cam canâ interrupt the sequencing so that one function runs while another does notor the timer will not advance at all. Compatibility depends on the panel layout, connector pinoutand mounting-the replacement must match the original timer’s terminal configuration and shaft orientation to ensure correct electrical routing and mechanical fit.
- Cycle dial does not advance or stalls between positions.
- Drum âspins without heator heat is present but drum does not turn.
- Continuous heating irrespective of cycle selection.
- Intermittent operation or ârandom changes in cycle timing.
- No power to motor or heater terminals⣠while incoming line is present.
Diagnostics focus on â¤verifying â˘that the timer both receives incoming line voltage and correctly forwardsâ that voltage to the expected outputs as the⤠dial moves.With the dryer unplugged, inspect the timer for burned contacts, melted plasticor broken cam lobes; with power applied and appropriate safety precautions, use âŁa multimeter âŁto measure voltage at the incoming line âŁterminal and at each output terminal while⢠rotating the timer through⤠positionsand to check continuity across switch contacts in static positions. In practice, if the âmotor output shows line voltage but the motor does not run, suspect motor⢠or door interlock; âŁif incoming line is present but the heater terminal never receives voltage in âany position, the timer â¤is the likely fault and⢠should be matched by pinout and shaft length before replacement.
| Item | Description |
|---|---|
| Line/Hot | Incoming mains feed that the timer switches to motor, heaterand control circuits. |
| Motor â¤output | Switched terminal that supplies the drive motor during spin and tumble â¤positions. |
| Heater output | Switched terminal that supplies the heating element or gas valve circuit during heat segments. |
Replacement â˘Considerations,Model Compatibility,and StepâbyâStep Installation for the 279737 Timer
The 279737 Whirlpool Dryer Load timer is an electromechanical cycle selector âŁthat advances the dryer through timed positions and routes power to the heatingâ element,drive motor,and control switches. Internally âit combines a small synchronous motor âŁand âaâ bank of camâoperated microswitches; âŁas the motor turns,â cams open and close circuits to enable different functions (tumble, heat, cool down). When assessing replacement compatibility, compare the part number,⣠shaft diameter and âlength, mounting hole patternand the exact terminal layout: âŁmismatches in spade terminal positions or a different shaft style (Dâshaft versus smooth) will prevent⣠a direct swap even if the â˘part fits the control opening physically. Diagnostic context: a dryer â˘that runs but does not advance cyclesor that⢠supplies heat only in some⢠positions, commonly indicates a failing timer, but similar symptoms can come â˘from a faulty thermal fuse, door switchor selector switch-confirm âwith⣠continuity and voltage checks before replacing the timer.
Replace the timer only after âŁeliminating other evident electrical faults and preparing for safeâ access; use a multimeter to verify there is â¤no line voltage at the unit before disconnecting connectors. During installation,remove the control knob,detach the control panel or back cover as⣠required,photograph andâ label each spade connector to preserve the⤠original wiring pattern,then remove the mounting screws,replace âŁthe timer,and â¤reconnect wires in the documented order. After reassembly, verify⢠operation by selecting several cycle positions and measuring expected line voltages to the heater and motor circuits; if the new timer fails immediately, recheck âterminal â˘seating â¤and confirm âthe replacement sharesâ the same mechanical â¤indexing so the controlâ positions correspondâ to the intended cam settings.
- Disconnect power at the breaker orâ unplug before beginning work.
- Document wire locations with photos or âŁlabels; remove knobs and mounting⢠screws.
- Check timerâ motor⣠continuity and switch contacts with a âmultimeter⢠beforeâ removal.
- Match terminal layout,shaft type,and mounting holes when⣠ordering replacements.
- Reassemble and perform functional voltage checks across motor and heater circuits.
| Item | Description |
|---|---|
| 279737 Whirlpool Dryer Load timer | Electromechanical cycle timer âwith multiple spade âterminals; replaces âŁselect Whirlpool/Kenmore models⣠when shaft and terminal layout match. |
Q&A
What is the function of the 279737 Whirlpool dryer load timer?
The 279737 is a mechanical/electromechanical load timer assembly used to advance dryer cycles and switch heat/motor circuits at the correct times.It contains a small synchronous motor and internal cams/contacts that open and close circuits as the cycle progresses, controlling functions such as timed dry, auto dryand transition between heat and cool-down âphases.
What are âcommon symptoms of a failing â279737 timer?
Common symptoms âinclude a dryer that will not⢠advance throughâ cycles (stays on one setting), a dryer that won’t âstart or stops mid-cycle, loss of heat or heat not switching correctly between stagesor intermittent operation of the motor/heater that corresponds with timer positions.â Sometimes the timer motorâ may hum but the shaft won’t turn if internal gears/cams are damaged.
How can I diagnose whether the timer is bad or another component (thermal fuse, motor, door switch)?
Start by checking easier-to-access safety parts: verify the thermal fuse, door switchand cycling thermostat for continuity with a multimeter, âŁand confirm the drive motor runs when powered. If those parts are good and the âdryer still won’t advance or switches incorrectly, then test the timer:â with the dryer unplugged remove the timer and inspect for burned contacts or broken gears. If safe and â˘you are qualified, with the dryer powered and the timer installed you can measure for voltage at âthe timer’s drive⣠motor terminals whileâ selecting⤠a timed cycle-if voltage is âpresent but the timer motor doesn’t turn, the timer is faulty.
Can I test the 279737 timer with a multimeterand what âshould âIâ check?
Yes. With power removed, check the timer for âcontinuity across specific â¤contact pairs shown⣠on the wiring diagram for your dryer âmodel (terminal pairings change â¤with âcycle selection). Also check the internal motor winding âŁfor continuity-if the motor winding is open, the timer is defective.For live voltage checks (to verify the timer motor receives line voltage when it should) only qualified persons should perform them. Always disconnect power before removing or handling parts.
Is the 279737 timer a direct replacement forâ any whirlpool dryer modeland how do I confirm⢠compatibility?
not necessarily. The 279737 is an OEM âŁpart ânumber but fitment⢠depends on the dryer model and production date.Confirm compatibility by matching the part number to your dryer’s model ânumber on the appliance data plate and the manufacturer’s parts list or the parts supplier database. If unsure, provide âyour dryer’sâ exact model and serial number to the parts seller âor reference the â˘official Whirlpool parts⤠lookup.
How âŁdifficult is itâ to replace the 279737 timer and what tools are required?
Replacement difficulty is moderate.â Typical steps include unplugging the dryer, removing â˘the control console or top panel to access the timer, labeling⤠and disconnecting wiring, unscrewing the timer, installing the new unit,â and reconnecting wires. Tools commonly required: screwdriver set (Phillips and flat), nut driver, needle-noseâ pliersand possibly a âsocket set. Expect about⣠30-90 minutes for the âjob for an experienced DIYer. Always follow the service manual and safety⣠procedures.
how much does the 279737 timer usually cost and are there alternatives?
Price varies by supplier and region but an OEM Whirlpool timer typically ranges from⤠a moderate to higher parts cost compared with simpler electrical components.â There may be⤠aftermarket equivalents available atâ lower cost, but OEM parts are recommended for exact fit and proper cam/contact â¤configurations.⣠Check warranty and return policies if purchasing aftermarket.
Does the âŁ279737 timer have a user-reset or calibration procedure if cycle selection is incorrect?
Mechanical/electromechanical dryer timers generally do not have a user-accessible â˘electronic reset.If the timer is out âof sync (stuckâ between positions) it usually needs replacement. âIn certain specific cases, cycling the mechanical control âthrough full rotation with the unit powered may â¤allow the synchronous motor to re-engage, but this should only be attempted⤠by a qualified person and with attention to safety. When in doubt, replace the timer assembly.
In Retrospect
The 279737 Whirlpool Dryer Load Timer serves as a central timing and sequencing component that regulates cycle progression âand coordinates various dryer functions. By controlling whenâ motors,heating elements and other subsystems engage and disengage,the load timer helps ensure dryers operate according to selected⢠settings and complete cycles reliably. Its proper function contributes â¤to consistent drying performance, energy use predictability and overall appliance reliability.
When a dryer exhibits symptoms⣠such as cycles that do not advance, erratic timingor inconsistent operation, the timer can be a potential âŁcause butâ is not the only possible source; thermostats, switches, wiring and control modules can produce similar behaviors. Accurate⤠diagnosis-whether performed âby a qualified technician or by someone experienced with âappliance testing-is significant to â˘confirm that the 279737 timer is the root issue before⤠proceeding with replacement.
Replacing a confirmed-faulty 279737 Whirlpool Dryer Load Timer with the correct, compatible part restores intended timing and sequencing, helps avoid unnecessary repairs to other componentsandâ supports safe, efficient dryer operation. Prioritizing proper diagnosis and using theâ correct replacementâ part-along with professional installation when appropriate-reduces downtime⣠and helps maintainâ the appliance’s performance and service life.
Professional Appliance Service
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