The 134398300 Frigidaire Washer dryer Turn-To-Start⢠Switch is a user-actuated rotary⣠switch assembly â¤used on Frigidaireâ washer-dryer controlâ panels to initiate machine âŁoperation. As âŁa⤠mechanical/electrical interface,the component provides anâ input to the appliance’s âcontrol circuitry when the â˘user⣠turns the knob to the start position; it is typically a âŁmulti-position âŁor âmomentary rotary device âŁmounted behind âŁthe control⢠bezel⣠and connected to the wiring harness.
Within the âappliance, the turn-to-start switch completes or signals the start circuit and âŁinterfaces directlyâ with theâ drive⢠motor â˘circuit, timer or electronic control boardand related interlocks (such as âŁthe lid/door âswitch and⤠thermal/protection devices).⤠It carriesâ line-level signals that energize relays or motor â¤controllers â¤and may alsoâ provide âfeedback⣠to theâ control logic. Proper electrical and mechanical function of the switch is thus necessary âfor reliable starting, for correct sequencingâ of the âwash/dry cycleand to prevent unintended⤠motor engagement when safety interlocks are not satisfied.
This article explains the âŁswitch’s â¤intended function and where it sits in the â˘control architecture,outlines â˘compatible âmodels and mounting/connector considerations for replacement,and âdescribes common failure symptoms such as no-start,intermittent operation,or contact arcing.It also covers practical diagnostic approaches a technician can use (visual inspection, continuity and voltage checks,⢠and verifying interlock behavior) and factors⣠to consider âwhen sourcing and installingâ a⣠replacement (terminal configuration, harness compatibility, âand safe isolation of âmains power).
Table of Contents
- Function âŁand Role âof the Turn-To-Start â¤Switch⤠in Frigidaire Washer-Dryer Control âsystems
- How the 134398300 Frigidaire Washer Dryer Turn-To-Start Switch Interfaces with Control Circuits, Actuationâ Mechanismsand âSafety Interlocks
- Diagnostic Symptoms and Electrical/Mechanical Failure⢠Modes of âthe âTurn-To-Start⤠Switch
- Compatibility, Replacementâ Considerations, Installation⢠Specificationsand⤠Troubleshooting Procedures for Turn-To-Start â¤Switches
- Q&A
- In Conclusion
Function and Role of â˘the Turn-To-Start Switch in Frigidaire âWasher-Dryer Control Systems
The 134398300â Frigidaire Washer Dryer Turn-To-Start âSwitch is âa⣠multiâpole rotary âswitching device âthat âprovides theâ user-initiated connection of line power to the washerâdryer’s drive â¤motor âand associated control⢠circuits. Internallyâ it contains â¤several sets of⢠contacts configured to route mains voltage to the âmotor, timer,â and accessory circuits depending on the position selected. â¤In⢠typical control architectures the⤠turnâtoâstart action completes the âmotor start circuit â¤whileâ also enabling the timing and interlock paths; â¤the switch therefore must carry motor starting âcurrentsâ and presentâ reliable contact closure under âload. Technicians should treat the⢠component⢠as a âŁpowerâhandling⤠electromechanical switch and verify terminal layout and wiring â¤compatibility with the appliance’s⤠wiring diagram before installation.
Failure modes areâ usually electrical (open â˘or highâresistanceâ contacts,pitting,arcing) or mechanical (worn â¤detents,slipping knob) and produce symptoms such as noâstart,intermittent starting,or visible arcing at the spadeâ terminals. Diagnostic checks include continuity/resistance checks between the common and positionâ terminalsâ while actuating⢠the âswitch, inspection â¤for heat discoloration or melted insulating material,â and âloadâtestingâ under appliedâ voltage âif safe to do so. When replacing the unit,⣠match the terminal arrangement,⤠mounting footprintand contact function⢠rather than â˘relying only on physical appearance; correct replacement restores proper sequencing of motor, timer,â and safety interlocks â¤in the control âsystem.
- Primary features: âmultiâpole⤠rotary contacts, â˘multiple spadeâ terminals, mechanical detents for position indexing.
- Common symptoms: no motor start, intermittent âoperation,â arcing or burning atâ terminals.
- Typical checks:⤠continuity under actuation, visual inspection,⤠confirm⢠wiring diagram/terminal mapping.
| Item | Description |
|---|---|
| Function | Routes âline voltageâ to motor, â˘timer,⢠and controlâ circuits according to selected position |
| terminals | Multiple spade-style⢠terminals with distinct âŁcommon and position âŁoutputs (verify applianceâ diagram) |
How the 134398300 Frigidaire Washer Dryer Turn-To-Start Switch Interfaces⢠with Control Circuits, Actuation Mechanisms, â¤and Safetyâ Interlocks
theâ 134398300 Frigidaire Washer Dryer Turn-To-Start Switch âisâ a mechanically actuated rotary switch that provides the primary user-initiated⢠interface between the operator⢠and â¤the appliance control circuits. Its internal contacts and detented positions⤠either ârouteâ mains power directly⤠to drive relays and heating elements or send a discrete signal into the machine’s electronic control board depending on â¤the model⢠design.In practical terms, the switch translates a manualâ turn into definedâ contact closures: common-to-start,⤠common-to-runand occasional auxiliary paths for timers âor indicators.Compatibility requires matching âŁthe âswitch’s terminal layout, contact ratingsand âmechanical shaft/bushing dimensions toâ the appliance⢠harness and⤠cabinet – using an⣠electrically â˘underspecified⣠or mis-pinned replacementâ can⢠prevent proper interlock behavior or overstressâ downstreamâ components.
- Contact â¤configuration: which⤠terminals close in each position and their current rating
- Electrical role: line-voltage âswitching vs. low-voltage signaling⣠to the control board
- Mechanical interface: shaft diameter, mounting flange,â and detent/latch behavior
- Interlock relationships: how the switch âŁworks with âdoor/lid locks, thermal cutouts,â and control logic
In system terms the turn-to-start switch sits at the boundary betweenâ user commands and safety-controlled actuation: the control board typically requires a closed safety interlock (doorâ lock/lid switch) andâ a valid start inputâ before âŁenergizing âmotor relays or heaters. â˘becauseâ some designsâ rely onâ the switch âto âdirectly switch mains, âwhile â˘others use it only as a low-voltage⤠command,â diagnostics should include verifying continuity of the switch in each position with power⣠removed and âconfirming that the safetyâ interlocks report closed⤠to âtheâ control module. Typical⤠field symptoms â¤of⢠a failing switch include no-start,â intermittent startingor burned/tarnished terminals; resolving those issues involves checking terminal continuity, inspecting contact surfacesand confirming the replacement matches â˘the original part’s electrical⤠and mechanical specifications.
| Item | Description |
|---|---|
| Start contact | Closes when knob is⣠turned âŁto initiate cycle; might â¤potentially be mains or⣠signal-level |
| Common | Shared return â˘or supply terminal for multiple switch positions |
| Auxiliary terminals | Used for indicators, timersor interlock feedback depending on model |
diagnostic Symptoms and Electrical/Mechanical Failure Modes of the Turn-To-Start Switch
The 134398300 Frigidaire Washer Dryer⢠Turn-To-Start Switch is â¤a rotary âŁstartâ device that completes the motorâ and control âcircuits when the user rotates the knob to the âŁstart position; in âmany â¤Frigidaire washer-dryer combinations itâ provides bothâ the âline connection â˘for the motor start winding and a âsignal to the timer or control board. Technically, theâ switch contains multiple contact sets thatâ must present low resistance âin the “start” position and open in “off” positions; compatibility isâ largely mechanical andâ electrical (terminal spacingâ and contact arrangement), â¤so â¤verify the appliance modelâ and harness connector before replacing the switch.â Typical use-case examples include restoring theâ motor-start path after âŁa⢠failed push-to-start arrangement or replacing a worn factory switch on⤠machines that exhibit no response when the knob is turned to start.
- No-startâ or no-power atâ the motor â¤terminals when the knob⢠is in the start position.
- Intermittent starting or hummingâ of the motor⤠indicating high-resistance or âintermittent contacts.
- Switch shaft that slips, does not detentor fails to return to off (mechanical wear).
- Blown fuses/thermal cutouts or tripped breakers caused by internal shorting.
- Visible burning, pittingor melted plastic around terminals⤠indicating arcing âor overheating.
| Item | Description |
|---|---|
| Openâ contact | High or âinfinite resistance in start âposition; symptom = no motor power despite correct knobâ position. |
| Shorted contact | Direct short between live⢠conductors â˘or to ground; symptom âŁ= blown⢠fuse/ âtripped breaker âon attempt to⣠start. |
| Intermittent contact | Corroded or pitted contacts produce flicker or erratic âŁstarts; continuity appears/disappears with shaft movement. |
| Mechanicalâ wear | Worn âdetent, broken âŁcamor⣠loose shaft prevents reliable engagement; symptom = knob rotates without making connections. |
| Thermal damage | Melted housing âor discolored âterminals from overheating; âoften accompanies âhigh-resistance contactâ failure. |
Diagnose faults by first⣠ensuring power is removed and âthen checking for continuity across the switch contact sets in each knob position and for â¤proper⣠terminal-to-terminal wiring against the⤠service schematic; under live â˘test conditions, âverify expected line⣠voltage⢠at the switch output while â¤an assistant turns the knob to start. If the switch shows â¤solid continuity in the⢠correct positions butâ theâ motor still⤠will notâ run, the⤠fault is⤠likely downstream (motor, start capacitororâ control board); if continuity isâ intermittent or there is evidence of arcing or melting, replacement is recommendedâ because âinternal contactâ repair âis rarely reliable. Always disconnect power before swapping theâ 134398300 unit,â and⣠confirm the replacement’s terminal layoutâ and connector compatibility âwith âthe⢠appliance wiring harness.
Compatibility, Replacement Considerations, Installation âSpecificationsand Troubleshooting Procedures for Turn-To-Start â¤Switches
the⢠134398300⣠frigidaire⢠Washer Dryer Turn-To-Start Switch is a mechanicalâ start switch used toâ engage the motor⤠starterâ circuit and select certain drive functions on compatible Frigidaire laundry appliances.This switch⢠provides detentedâ positions and internal contactâ sets that close the start/run âcircuit when âŁtheâ shaft⤠is rotated; technicians â˘should verifyâ fit by⢠comparing â˘shaft diameter,⣠mounting hole pattern, actuator orientation andâ terminal layout to the â˘existing switch⢠before âreplacement. Compatibility depends on thes mechanical âand electrical interfaces rather than â˘just part number, so confirm the connector type and contact arrangement â˘with the service manual or by âdirect comparison to avoid mismatches âthat can produce incorrect timing, failedâ starts,â or âcontact arcing underâ load.
Installation⣠requires basic safety practices and â¤verification of electrical â˘ratings: â¤isolate⢠mains power, note original wiring orientationand secure the switch toâ the panel using the originalâ fasteners; â˘ensure the⢠actuator engages⣠smoothly with the control cam and that terminals are tight to avoid high-resistance joints. For troubleshooting, check forâ these common symptoms and corrective actions:
- Motor failsâ to â¤start: verify switch continuity â¤acrossâ the appropriate contact pairs with the shaft in the startâ position and confirm incoming⣠supply⤠at the switch.
- Intermittent starting or burning smell: inspect for pitted or fused contacts and replace the switch if⢠contact surfaces are âcompromised.
- Noisy or â˘stiffâ operation: confirm shaft and⣠mounting alignment; replace ifâ mechanical â˘wear⤠prevents âŁfull contact closure.
| Item | Description |
|---|---|
| Supply voltage | Typically âthe switch is used in 120 VAC control circuits; verifyâ system voltageâ before installation. |
| Mounting | Panel-mounted with specific screw pattern -⢠confirm dimensions and actuatorâ orientation âmatch âthe original âpart. |
| Terminals | Multiple spade or⢠solder lugs corresponding to start/run circuits; â˘map terminals before disconnecting wires. |
| Service test | Use a âŁmultimeter⣠to check continuity through contacts inâ each⤠shaft position and⢠inspect contacts visually âfor pitting orâ burning. |
Q&A
What is the 134398300⢠frigidaire âTurn-to-Start switch⣠and âwhat does it do?
The 134398300 is aâ turn-to-start (rotary) start switchâ used on some âFrigidaire âwasher/dryer control panels. It completes theâ electrical⢠circuit to⢠the motor âor drive system when rotated âŁto the “start” position,allowing the â¤appliance to begin its cycle. It is indeed⢠a âmechanical/electrical component that⣠replaces a worn âor failed start selector.
Whatâ symptoms⤠indicate the 134398300 switch has failed?
Common symptoms include:â theâ machine does notâ start at⢠all; it only âstarts intermittently or only when the knob is held/pressed;â visible burning, meltingor⢠charring âaround the switch; a noticeable clickâ that doesn’t result⤠in motor start; or burning/electrical âsmell from the âcontrol panel.These â¤point⣠to worn contacts orâ an internal electrical failure in theâ switch.
How can I test the 134398300 switch with a multimeter?
Alwaysâ disconnect power first. Remove the control panel/knob to access the switch and note or âphotograph⤠wire locations. Set a multimeter toâ continuity â˘orâ low ohms. â˘With â¤the switch in⢠the⣠“off” position you should see open âŁcircuit between theâ common and start terminals; when â˘turned to the “start” position you should see continuity (near zero ohms) between the appropriate terminals. Also check for no continuity âŁbetween switch âterminals andâ chassis ground⢠(no short).If âreadings don’t change with rotation or⤠show a âshort, the⤠switch is faulty.
How do âI replace the 134398300 switch âsafely?
Turn⢠off power at the âŁbreaker or unplug âŁthe appliance.â Remove the control knob and any⤠screws holding âŁthe control panel, then âlift orâ remove theâ panel to expose theâ switch. Photograph or⣠label wiring before âŁdisconnecting.pull the quick-disconnect â¤terminals off the⢠old switch â(use needle-nose pliers ifâ needed), remove âthe mounting hardwareand install âthe new switch in the same orientation. Reconnect âwires to the same terminals, reassemble the panel and knob, then restore power and test. If unsure, â¤consultâ a qualified⢠technician.
Canâ the âŁ134398300 switch be repaired instead of replaced?
Minor contact corrosion â¤or dirt can sometimes be improved with an electrical contact cleaner,but because the switch contains small moving âŁcontacts andâ plastic parts âthat wear,repair is generally temporary and not ârecommended for burned or â˘intermittently failing switches. replacement is the reliable, long-term fix.
Is⤠134398300 an OEM Frigidaire⣠part and â¤how âdo I confirm compatibility with my model?
134398300 is listed as a Frigidaire-style turn-to-start switch (OEM⣠listings vary by âsupplier).Always confirm compatibility byâ checking your appliance model ânumber and cross-referencing the part number on Frigidaire’s parts site or trusted parts retailers (AppliancePartsPros, RepairClinic, manufacturer âparts pages). Match⤠part numbers and âphotos – do not rely only on generic descriptions.
are there any common installation pitfalls I should avoid?
Yes. Common mistakes⤠include not labeling âwires (which can lead to incorrect reconnection),forcing the knob orâ plastic retainingâ clips (causing breakage),reversing the switch orientation,and⣠testing with power â˘connected before reassembly. Also be careful to seat quick-disconnectâ terminals fullyâ and ensure the replacement⣠part⤠exactly matches mounting and âterminal layout.
Where⢠can⤠I buy the 134398300 switch and does it come with aâ warranty?
You can buy this switchâ from⤠Frigidaire-authorized â¤parts dealers, major⢠appliance-parts websites â(RepairClinic, AppliancePartsPros, PartSelect),â andâ general marketplaces (Amazon, eBay). Warranty and âŁreturn policiesâ vary by⢠seller; many reputable sellers provide limited warranties⣠(commonly 90 days to â1 year). Verify theâ seller’s return policy and warranty before purchase and confirm the partâ fits your⣠specific appliance âmodel.
In Conclusion
The 134398300 frigidaire Washer âdryer Turn-To-Start Switch serves as a critical interface that â¤initiates and controls the âpower flow âfor the washer-dryer unit, ensuring reliable start-up and proper operation. As a frequently used mechanical/electrical component, its condition⤠directly affects machine responsiveness, user safetyand overall appliance â¤performance; âa worn or faulty switch⣠can lead to âintermittent starts, failure toâ engage âcyclesor othre operational issues.
As symptoms of switch failureâ can resemble⣠other electrical or control âproblems, accurate diagnosis âis essential to avoid unnecessary parts replacement and toâ restore â¤dependable operation. When testing confirms the⢠switch is theâ source of the issue,replacing it with the correct partâ andâ following âappropriate âŁsafety andâ installation practices will help maintain appliance longevity and performance. Engaging qualified serviceâ personnel âŁor following⣠manufacturer â˘guidance ensures the replacement is performed⢠properly and preserves the safe, âreliable function of theâ washer-dryer.
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
.
