279737 Whirlpool âDryer Load Timer is an âŁelectromechanical control assembly used in many Whirlpool dryers âŁto sequence âand time drying â¤cycles. As a rotary cam-drivenâ timer it contains â˘a⢠motor⢠and a bank of switching contacts that⢠close and open circuits âat⤠predetermined positions, providing timed control of â˘the dryer’s functions rather than continuous manual â¤switching.
Within âŁthe appliance the â¤loadâ timer coordinates â¤the interaction between the user-selected âcycle and the dryer’s primary⣠systems: â˘it supplies switched power to the drive motor, heating circuitâ (element or gas valve/igniter), âand auxiliary controls such⤠as thermostats, âŁdoor âswitch â˘interlocks, â¤and timer-driven sensors. The timer’sâ cams⤠and contacts determine⤠when heating is applied, when the drum motor runsand when âauxiliary loadsâ are energized, so failures or contact wear can⣠produce mis-sequenced or non-functioning subsystems evenâ when individual components test good.
In this article you will find a technicalâ description of â¤how the 279737 timer âfunctions, guidance â˘on model⣠andâ connection compatibility,⢠commonâ failureâ symptoms to watch for (such⣠as failure to advance, intermittent heatingor burned contacts),â practical troubleshooting stepsâ including electrical checks and mechanical âinspectionand replacement considerations such as matching terminal layouts, âmounting â¤orientationand⣠safety precautions for working on mains-powered equipment. the intentâ is â˘to provide a technician or experiencedâ appliance âowner with the diagnostic âcriteria and â˘procedural context needed to assess and, were â˘appropriate,â replace the timer assembly.
Table of Contents
- Functionâ and Roleâ of the Load Timer in Whirlpool Dryer Cycle Control
- Howâ the 279737 Whirlpool Dryer Load⣠Timer Works â¤Insideâ the Appliance: Electrical Pathways and Mechanical Sequencing
- Common Failure Symptoms and Diagnostic âIndicators for⤠Timer-Related Faults
- Compatibility, Replacement âConsiderations, âŁStep-by-Step Installation and Troubleshooting Procedures
- Q&A
- Wrapping Up
Function and Role of the Loadâ Timer in Whirlpoolâ Dryer âCycle Control
The â 279737 Whirlpool Dryer⣠Load Timer is an⣠electromechanicalâ sequencing device thatâ directsâ line voltage to the dryer’s â˘motor, heating element and⤠accessory circuits by âmeans of a cam-operated contact âstack. As the timer â¤motor advances the cams, specific contacts close â˘or open to implement âuser-selected program steps (tumble, heat, cool-downand âstop); the timer therefore performs⢠power âŁrouting and cycle sequencing rather than âsensingâ temperature. Replacements must match⤠the part number,⤠terminal layout and harness â¤connectors so the cam profiles and contact assignments align with the dryer’s âŁwiring diagram and electrical ratings.
- Primary functions: sequence power to⤠motor andâ heater,⣠provide âtimed âtransitions⣠between âcycleâ phases, â˘and terminate power at the end of a⢠cycle.
- Common failures/symptoms: timer âmotor dead âor slow, contacts burned â¤or intermittent, dryer runs but will not â¤heator cycles do not advance.
- Practical checks: verify incomingâ line voltage at the â¤timer⢠common, observe â¤voltage at heater and motor terminals â¤during expected phases, test timer motor continuity âŁand listenâ for the timer drive, âŁand compare contact behavior to the service wiring diagram.
For⤠troubleshooting, technicians â¤typically âstart by âconfirming mains â˘presence at theâ timerâ input âŁand â˘then exercise the âtimer⣠to observe which outputs are⣠energized â˘at each cam â¤position; â¤a simple multimeter check of continuity â¤across expected⤠closed contacts while âadvancing⣠the timer identifies mechanical contact faults. In some modern âmodels âthe mechanical timer âŁhas been superseded by electronic control modules, so âverify model compatibilityâ and terminal mapping before installingâ a⣠replacement: matching âŁtheâ 279737 Whirlpool Dryer Load⤠Timer to the dryer’s service sheet prevents miswired â¤circuits andâ unexpected behavior.
| Item | Description |
|---|---|
| Timer motor | Drives the cam âŁstack to advance contact positions (commonly 120⣠VAC) |
| Common â¤(line) | Incoming line-voltage feed distributed to contact banks |
| Heater âŁcontact | Switches â˘power to the heating element during heat phases |
| Motor contact | supplies the âdrum motor/tumble circuit when closed |
Howâ the 279737 â¤Whirlpool⣠Dryer Load Timerâ Works inside the Appliance: Electricalâ Pathways and Mechanical⢠Sequencing
The 279737 Whirlpool Dryerâ Load Timer is an electromechanical sequencing device that routes incomingâ mains voltage⢠throughâ a stack of cam-operated â˘contacts to control⤠the motor, âheating circuitand timed functions.⣠Internally it contains a âŁsmall synchronous drive âmotor and a cam assembly; as the⤠drive⢠advances, individual contacts â˘closeâ or â˘openâ accordingâ to the selected cycle.â The timer⢠does not generate temperature control on its â¤own⤠but⣠provides switching pointsâ for thermostats, the motor, start/door switchesand the heating element, so worn or pitted timer⣠contacts⤠can⤠produce symptoms such as failure to advance, intermittent heator inability â¤to select âcertain cycle steps. In practical replacement work âyou must match âtheâ terminalâ layout âŁand cam function to theâ dryer model-electromechanical timers are not interchangeable with electronic control boards that use âsensor-driven logic.
- Common⣠symptoms â¤tied to timer faults: âfailure to advance, no heat whileâ motor runs, stuck on⣠one cycleorâ erratic cycle switching.
- Key behaviors: timer advances only when the motor circuit isâ energized on âŁmany models; heat circuitâ is routedâ through thermostats and the timer’s heat â¤contacts.
| Item | Description |
|---|---|
| Timer drive motor | Provides rotational motion to the cam stack; âtypically powered only when the dryerâ is running. |
| Cam-operated contacts | Switch âmains voltage to âŁmotor, heating elementand auxiliary circuits at programmed intervals. |
| Heat circuit path | Line â timer heat contactâ â thermostats/thermal fuseâ â heating element â¤â neutral. |
| motor/advance path | Line â âstart/door⤠switch â motor â timer drive; motor operation commonly enables timer advancement. |
Understanding the⣠electrical pathways helps with⤠targeted⤠troubleshooting: measure for 120 VAC at the timer’s common âterminal and at individual cam outputs âwhile the dryer⤠is in a given cycle to verify that the timer isâ supplying âpower âŁto the motor⢠and heat circuits. Such as, â¤if the motor receives voltage but the element does not, âthe technician â˘should inspect the timer’s heat contacts and â˘series â˘thermostats⤠or fuses; if the timer âfails to advance âdespite the motor⢠running, the internal â¤drive motor âor â¤theâ cam coupling mayâ be worn. When replacing the timer,confirm mechanical sequencing âŁ(whichâ contactâ closes âat each position) and terminal numbering against the â¤dryer wiring diagram-mis-matched âŁsequencing âwill produce incorrect cycle behavior even if terminals physically fit.⤠Always disconnect mains âpower before probing or replacing the timer and useâ the âŁdryer’s schematic to trace âcontrol paths rather than relying on pin⤠position alone.
common Failure Symptoms and Diagnostic â¤Indicators forâ Timer-Related Faults
The 279737 Whirlpoolâ Dryer Load Timer⤠is âan electromechanical âcontrol that âŁsequences power to the âŁmotor, heating elementandâ ancillaryâ circuits by switching cam-operated â˘contacts as â¤the timer motor advances.⤠In practical âterms, the timer routes 120âŻVAC to different circuits â¤accordingâ to the selected⤠cycle and remaining run âtime; when the cam contacts â˘or the timer motor degrade the dryer can âexhibit mis-sequencing â(for example drive⣠motor power without heat or heat continuously applied). â¤Technicians should verify âphysical â˘compatibility by matching connector harnesses, mountingâ pointsand terminal markings to the â¤service schematic for the âspecific Whirlpool model before replacing⤠the assembly.
- No advancementâ of cycle or stuck⢠in one cycle position â¤while the⣠drum turnsâ (timer motor not advancing).
- Continuous or no heat while âŁotherâ functions operate normally (contacts⢠shorted or open âin the heater âcircuit).
- Intermittentâ operation,skipped cycle⣠steps,or audible grinding/clickingâ from the timer â˘(worn cams or debris âin mechanism).
- Visible burning, pittingor melted terminals⣠at the⤠timer indicating high-resistance⤠contact⣠failure.
Diagnosing⢠timer-related faults focuses on verifying the timer motor supply and theâ state of the switch contacts â¤across â˘cycle positions. Use âa voltmeter to confirm the timer motor âreceives âapproximately 120âŻVAC when the dryer âshould advance; â¤lack ofâ voltage can indicate upstream failures (door switch,thermal⣠cutouts,or selector switch)⤠rather than the âŁtimer motor⣠itself.⣠With the timerâ removedâ or back-probed per the wiring diagram,⣠check continuity between the common and position-specific âterminals for several⤠discrete timer positions-the contacts should show âlow resistance when closed and open when not selected. If contact â˘continuity is inconsistent with the schematicor if the âŁtimer âmotor â˘shows an open⢠winding or draws âexcessive current while⤠not turning, replace the 279737 timer assembly;â cleaning â˘pitted contacts is a temporary measureâ but⢠does not restore precise cam timing.
| Item | Description |
|---|---|
| Timer motor âŁsupply | Approximately 120âŻVAC present during â¤advance; âabsence⤠suggests upstream⢠circuit fault. |
| Contact⣠continuity | Low resistance âwhen contact â¤is engaged for the given timer position; open⤠when disengaged-compare to model schematic. |
Compatibility, Replacement Considerations, Step-by-Step⤠Installationâ and Troubleshooting⢠Procedures
The 279737 Whirlpool Dryer Load⣠Timer is anâ electromechanical timer assembly âthat sequencesâ dryer⣠cycles by using a small synchronousâ motor⣠and⣠cam-operated switchâ contacts to route power to the heating element, motor,â and other control circuits. âFunctionally, â¤the timer advances âŁthe program stages â˘(timed â¤dry, cool âŁdown, automaticâ moistureâ control) and provides â˘switching pointsâ for thermostats and safety interlocks; technicians should confirm the replacement timer âŁhas the same terminal layout, shaft orientation, mounting flangeand motor voltage (typicallyâ 120 VAC)â as the original to ensure⢠electricalâ and mechanical compatibility.When assessing compatibility, compare⣠the physical connector arrangement âand â¤camâ profile against the⣠service schematic rather thanâ relying solely on model name-two timers that âlook similar can have different contact âŁarrangements that âŁchange circuit âbehavior under load.
For replacement and troubleshooting, begin âby⢠taking clear photos âof the â¤existing wiring and âcontrol positions, â¤thenâ disconnect power and label eachâ terminal before removal; after âswapping⤠the⤠timer, verify proper â¤operation by running a manualâ cycle and measuring for continuity or correct voltage⣠at the expected contact points. Typical installation and diagnostic workflow⤠includes steps to remove access panels, âŁunfasten the timer, match and attach the harness, â˘and â¤verify that the motor advances the cam; if⣠symptoms persist (timer does not advance, dryer stallsâ mid-cycleor cycles are erratic),⣠use a multimeter â˘to⣠check âŁfor⣠120 VAC atâ the timer motor, continuity⤠through the cam contacts during expected positionsandâ proper operation of⤠interlocks âŁsuch as door andâ belt switches.
- Key replacement steps: power off, document wiring, âremove screws, swap unit, reconnect labeled wires,â power onâ and runâ diagnostic⢠cycle.
- Troubleshooting checks: measure supply voltage to⤠timer motor, continuity âof cam âcontacts in each cycle positionand verify mechanical rotation (motor âaudible/humming).
| Item | Description |
|---|---|
| Model | 279737 Whirlpoolâ Dryer Load Timerâ – replace only⢠with matching terminal/cam configuration |
| Voltage | Timer motorâ typically operates⢠on⢠120 VAC; confirm âŁwith⢠schematic or meter before replacement |
| Compatibility | Matches dryers with identical mounting flange, shaft lengthandâ connector â¤arrangement; cross-check part âŁnumbers and â˘wiring diagrams |
Q&A
What is the⢠279737 Whirlpool dryer load timer â˘and what does âit do?
The 279737 is âa dryer cycle/load timer assembly âused âon some âwhirlpool-family dryers. â¤It mechanically (orâ electromechanically) sequences the dryer’s â˘circuits duringâ a selected cycle, routing power âto the motor, heaterand other control switches⢠at the correct timesâ so âthe⣠dryer advances through timed and⣠automatic portions of a âŁcycle.
What are âcommon âsymptoms âthat âthe 279737â timer isâ failing?
Common signs include: the dryer won’t advance through âcycle settings (stuck on one position), noâ power to âŁthe heater âor â˘motor âduring⤠portions of the cycle, the timer⤠knob⣠won’t turn,â or intermittentâ operation where someâ functions work sporadically. Note that similarâ symptoms⢠can be caused by other⣠parts⤠(door switch, thermal â¤fuse, cycling thermostat,â wiring), â˘so diagnosis is important.
How can âIâ test the 279737 timer to see if it’s⣠defective?
Always unplug the dryer before testing. Use a multimeter to check continuity across the timer’s switch âcontacts as you manually advance the timer âknobâ (or â˘energize the timer⤠motor) and compare to the dryer’s wiring diagram/service sheetâ to know âwhich contacts⣠should âbe â˘closed in each cam position. Also⤠check for â˘continuity âin the timer motor windings. If the âexpected contacts⢠do not âŁopen/closeor the timer motor has infinite resistance (open), the â¤timer is likely âŁdefective. âŁIf unsure about reading the wiring â¤diagram or live-voltage checks,⢠consult a service technician.
How do I replace theâ 279737 âtimer? Is it â¤a job I can do myself?
Replacement â¤is typically straightforward for âa person comfortable with basicâ appliance repair: unplug⢠the dryer, remove⤠the control âpanel or back cover to access the timer,â takeâ a photo or label each âŁwire, pull off⣠connector âterminals, remove âŁmounting âscrews, install the⤠new⤠timer, reconnect wires inâ the correctâ positions, reassembleand test. Use â¤care to align the timer shaft/knob correctly. If you are not comfortableâ working with electrical parts or removing panels, hire aâ qualified technician.
Areâ there any safety steps⢠I should follow â¤before âworking on the timer?
Yes. Disconnect powerâ at the wall outlet (unplug) before doing⣠any work. If you must test live⣠circuits, use insulated tools â¤and âŁa âproperly rated multimeter⤠andâ be experienced with⣠live-voltage⣠measurements. Avoid working on the dryer with wet handsâ or in damp conditions. âŁAlso ensure the gas supply is âturned off if working â¤onâ a gas dryer and⢠follow manufacturer safety âguidelines.
How do â˘I know âif⢠the 279737â is the correct replacement for my dryer?
Verify compatibility âby matching âtheâ original part number on the old timer âandâ checking âyour â¤dryer’s model andâ serial number against the manufacturer parts list or an authorized partsâ supplier. Doâ not ârely solely⢠on⤠visual similarity-use âWhirlpool’s⢠parts lookup or an official⤠parts diagram âto confirm theâ 279737 is listed for your specific dryer model.
Can⢠the⣠279737 timer be repairedorâ should it be replaced?
Most technicians will replace a faulty⤠cycle timer ratherâ than repair it. Mechanical wear, burned⤠contacts â¤or a⣠failed timer motor areâ common⣠failure âmodes and replacement is usuallyâ faster, âmore reliable and cost-effective âthan attempting an internal repair.In rare casesâ a technicianâ might potentially â˘be⣠ableâ to clean or re-seatâ contacts,â but that is not âa guaranteed long-term fix.
What might cause â˘the timer to fail prematurely and how can âI prevent it?
Causes include arcing/burned contactsâ from⢠high current draw, overheating⢠due to⣠blockedâ vents or a failingâ cycling thermostat, moisture âingressorâ simply⢠mechanical wear from⤠heavy use. Preventive actions: keep âdryer vents andâ lint⢠traps cleanâ to avoid overheating, have thermostats and thermal fuses checked during maintenance,⤠and avoid overloading the⢠dryer. âRegular maintenance⢠and prompt ârepair of related failures reduce stress on the timer.
Wrapping Up
Theâ 279737 Whirlpool dryer load timer isâ a âŁkey âcontrol â¤component âthat âgoverns cycle â˘sequencing andâ timing within⤠compatibleâ Whirlpool⣠dryer models. â¤By coordinating when the⤠motor, â˘heating elementand variousâ switchesâ are energized,⤠the load timer helps ensure dryers complete âselected cyclesâ reliably and safely. Its proper function contributes directly to consistent drying performance and efficient appliance operation.
because⢠symptoms of â¤a⣠failing load timer-such âas cycles thatâ do not advance, inconsistent heating,â or âŁintermittent operation-can overlap with other electrical or mechanical âissues, accurate diagnosis is âessential. Confirming the timer⢠as the root cause before replacement helps⣠avoid needless parts âchanges and ensures the underlying issue is â˘addressed. âŁWhen replacement is ârequired, using the correct part number âand followingâ manufacturer-recommended âproceduresâ preserves appliance safety and⢠reliability.
the 279737 load timer plays⤠an important role in dryer operationand prompt, accurate identification and âreplacement of a defective timer â¤can restore normal function and extend the appliance’s service life. âFor complexâ diagnostics or repairs, consult the dryer’s service documentation or⤠a qualified service â˘technician to â¤ensure âthe repair â˘is performed safely and effectively.
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