807387501 Frigidaire Dishwasher Timer is the designated OEM timer assembly used to sequence and control the major operating phases of applicable Frigidaire dishwasher models. Technically, this component functions as the timing and switching element in the appliance’s control architecture – either as an electromechanical cam-driven timer or as an integrated electronic control module depending on the specific model – and provides time-based switching of power to valves, motors, heating elements and other subsystems.
Inside the appliance the timer coordinates interactions between the user controls and the mechanical/electrical subsystems: it issues switched outputs to the water inlet valve,circulation pump/motor,drain pump,and heating element; it enforces interlocks with the door latch and float/overflow sensors; and it interprets or provides signals to other control circuitry. As a central sequencing device it both supplies switching power to actuators and monitors or responds to feedback (such as end-of-cycle switches or thermal sensors), so failures or erratic behavior at the timer can produce symptoms across multiple systems.
In this article readers will find a technical review of the timer’s intended function and where 807387501 fits in the dishwasher control topology, guidance on checking electrical compatibility and mechanical fit, common failure symptoms and likely root causes (worn contacts, failed drive motor, burnt traces or failed switching devices), diagnostic checks a technician can perform to isolate the timer from other subsystems, and practical replacement considerations including harness and mounting verification, safety precautions, and when an OEM assembly is required. The goal is to provide the technical context needed to assess, test, and, if necessary, replace the timer without speculative or promotional claims.
table of Contents
- Function and role of the Timer Module in Cycle Sequencing, Safety Interlocks, and User Interface Control
- How the 807387501 Frigidaire Dishwasher Timer Works Inside the Appliance: Inputs, Control Logic, and Output Switching
- Common Failure Symptoms and Diagnostic Indicators of Timer-Related Electrical and Mechanical Faults
- Compatibility, Replacement Considerations, and Step-by-Step Installation Procedures for the Timer Module
- Q&A
- In Retrospect
Function and role of the Timer Module in Cycle Sequencing, Safety Interlocks, and User Interface Control
The 807387501 Frigidaire Dishwasher Timer is the electromechanical/electronic control that sequences wash, rinse, drain, and dry functions by switching power to motors, solenoids, heaters, and the door latch at the correct times. In operation it receives line power and discrete inputs (door switch,float/overfill sensor,cycle selector) and provides timed outputs to the pump motor,wash valves,and heater element. Compatibility is resolute by the harness connector and terminal assignments: identical part numbers ensure the cam profile (for mechanical timers) or firmware/relay map (for electronic timers) matches the dishwasher model.Replacing a timer with a diffrent part number can result in mismatched connectors or incorrect output timing that prevents the dishwasher from advancing cycles or engaging safety interlocks correctly.
The timer enforces safety interlocks by monitoring door and water-sensing inputs and inhibiting hazardous outputs until safe conditions are present; such as, it will not enable the heater or allow the pump to run if the door switch is open or an overfill condition is detected. For technicians, common troubleshooting steps involve verifying line voltage at the timer input, checking continuity of cam-actuated switch contacts (mechanical types), or measuring relay/coherent output voltages (electronic types) as the unit steps through cycles. Typical failure modes include stuck cams, burnt relay contacts, or failed input sensing that manifest as a unit that won’t start, won’t drain, or skips cycles-symptoms that point to the timer before replacing downstream components.
- Monitored inputs: door switch, float/overfill sensor, cycle selector
- Controlled outputs: pump motor, wash/rinse solenoids, heater, drain pump, indicator lights
- Common symptoms of failure: no cycle advancement, audible clicking without motor activation, intermittent operation
| Item | Description |
|---|---|
| line Input | Main AC supply to the timer; verify presence before testing outputs |
| Door Switch Input | Interlock signal that prevents operation with the door open |
| Pump/Valve Outputs | Timed contacts or relays that supply power to motors and solenoids |
How the 807387501 Frigidaire Dishwasher Timer works Inside the Appliance: Inputs, Control Logic, and Output Switching
The 807387501 Frigidaire Dishwasher Timer functions as the central sequencing device that orchestrates power distribution and timed transitions between fill, wash, drain, and dry stages. In typical installations the module receives mains power plus status inputs such as the door/start switch, water-level float, and temperature/thermostat signals, and advances a mechanical or motor-driven cam/step mechanism to close and open internal switch contacts. Those contacts directly switch line voltage to the key subsystems – water inlet solenoid, circulation pump/motor, drain pump, and heating element – so correct terminal layout and cam timing are essential; replacement units must match the original connector harness and switching pattern for safe, reliable operation in the intended Frigidaire models.
The control logic inside the timer is deterministic and sequential: a timing motor or stepper moves the cam profile to predefined positions that energize specific outputs for set intervals (for example, open inlet valve during the initial fill, run circulation motor during the wash dwell, then switch to drain). External interruptions such as a tripped float or an open door switch remove power or advance the logic to a safe state, preventing overflow or operator hazard.Practical diagnostic cues correlate to the timer: if the pump runs but the heater never receives power, inspect the timer’s heater-contact and associated wiring; if the cycle will not advance even though the motor runs, the cam contacts or plastic actuator might potentially be worn. Key signals and outputs handled by the timer include:
- Inputs: mains supply, start/door switch, float/level sensor, thermostat/thermal cutouts
- Control elements: timing motor/stepper and cam-operated switch sets
- Outputs: inlet solenoid, circulation motor, drain pump, and heating element power feeds
| Item | description |
|---|---|
| Timer motor | Drives cam/step mechanism to advance sequence positions |
Common failure Symptoms and Diagnostic Indicators of Timer-Related Electrical and Mechanical Faults
The 807387501 Frigidaire Dishwasher Timer is a mechanical cam-and-contact timing assembly driven by a small synchronous motor that routes line voltage to the pump, inlet valve, heater, and drain motor in the correct sequence. The timer behaves as both a selector and a switching hub: cams open and close fixed contacts to energize specific circuits at each step of the program. Compatibility is model-specific; the assembly replaces the OEM timer in corresponding Frigidaire chassis, and mechanical wear, burned contacts, seized bearings, or moisture intrusion are the typical failure modes that change normal behavior-examples include a timer that hums but does not advance (stalled motor), one that skips steps (worn cams or intermittent contacts), or one whose contacts remain closed (continuous fill or run conditions).
- No cycle advancement while motor hums (stalled or seized timer motor)
- Cycles stop mid-program or start skipping functions (worn cams or intermittent contacts)
- Continuous run or continuous fill/drain (stuck/shorted contacts)
- No power to heater or pump though other circuits work (open contact for that step)
- Burnt smell, visible arcing, or corrosion at contact points
- Erratic operation when exposed to moisture or after being jostled (loose connections)
| Item | Description |
|---|---|
| stalled timer motor | Motor hums but cam does not rotate; verify supply voltage to motor and mechanically inspect for seized shaft. |
| Burned or pitted contacts | Intermittent or failed circuits at specific cycle steps; inspect contact faces and check continuity across contacts when actuated. |
| Mechanical wear/slip | Knob or cam advances inconsistently; manual rotation advances cycle indicating worn detent or cam surfaces. |
Diagnosing issues requires visual inspection and basic electrical checks: with power removed confirm secure wiring and dry, clean contact surfaces; with the unit powered and a safe test setup measure voltage at the timer motor and at the terminal corresponding to the failed function during the associated cycle step. A technician will compare observed voltages and continuity readings to the factory service data for the specific Frigidaire model; practical examples include manually advancing the timer to see if a heater or pump energizes (isolates the contact function) and measuring continuity across suspect contacts when the timer is in the corresponding cam position. If contacts are fused, cam lobes are damaged, or the motor windings are open, replacing the timer assembly is typically the practical repair.
Compatibility, Replacement Considerations, and Step-by-Step Installation Procedures for the Timer Module
The 807387501 Frigidaire Dishwasher Timer is an electromechanical timer assembly that sequences power to the motor, valves, pump and heaters by using a small synchronous motor driving cam-operated switch wafers. Functionally it acts as a timed switchboard: the motor advances cams at a fixed rate (typically 60 Hz synchronous timing on North American units), closing and opening contact sets to start and stop subsystems.Compatibility depends on electrical ratings, terminal layout, cam profiles and mounting geometry; two timers with identical faceplates can still be incompatible if the terminal numbering, cam dwell positions, or shaft orientation differ. Technicians should compare the service wiring diagram and harness connector style, and measure motor coil resistance and contact continuity to confirm equivalence before substitution.
- disconnect power at the breaker or unplug the appliance before beginning work.
- Remove access panels and take a clear photo or mark wire positions on a diagram to preserve terminal assignments.
- Record the timer knob position and cam index marks so cycle timing is preserved when installing the replacement.
- Remove mounting screws and disconnect the harness; inspect harness connectors for corrosion or melted insulation.
- Fit the replacement ensuring correct shaft rotation and cam orientation, transfer any mechanical stops or linkages, then reconnect wires to the original terminals.
- Verify motor continuity and that switch contacts change state as the shaft is rotated manually before restoring power, then run a short diagnostic cycle to confirm proper sequence and no unintended load on pumps or heaters.
| Item | Description |
|---|---|
| Rated voltage | Typically 120 VAC synchronous motor (verify per model) |
| Motor type | Synchronous cam motor; check coil resistance and shaft orientation |
| Connectors | Numbered spade terminals; colors may vary-match by terminal number, not color |
| Common faults | Worn cams, burned contacts, seized motor bearings |
When replacing the timer, prioritize exact part-number matches or verified cross-references; substituting a visually similar timer without confirming cam profiles or terminal functions can result in incorrect sequencing (such as, pump running during drain instead of wash). Inspect the original for mechanical wear-degraded cam surfaces or pitted contacts indicate replacement rather than repair-and use a multimeter to test motor winding continuity and switch contact operation.Some newer Frigidaire models use electronic control boards that perform the same sequencing functions; these are not interchangeable with mechanical timers without additional harnesses or control changes, so consult the model-specific wiring diagram and service manual to ensure correct integration and to avoid creating unsafe conditions for the heater, motor or door interlock circuits.
Q&A
What is the Frigidaire part 807387501 and what does the timer do in a dishwasher?
part 807387501 is the timer/control assembly used on certain Frigidaire dishwashers. The timer advances the wash cycle, energizes different circuits in sequence (wash pump, drain, diverter, heater, etc.), and coordinates timing for fill, wash, rinse and drain events. if the timer fails, the dishwasher may not advance cycles, may not start certain functions, or may stop mid-cycle.
What are common symptoms that the 807387501 timer is failing?
Typical symptoms include the dishwasher not advancing to the next cycle, stuck in one position (e.g., wash only), not starting at all, not draining or not heating when it should be, or intermittent operation. Before replacing the timer, rule out the door latch, thermal fuse, float switch, control board, and wiring as they can produce similar symptoms.
How can I test the 807387501 timer to confirm it’s bad?
First disconnect power to the dishwasher.Access the timer and use the wiring diagram/tech sheet to identify terminals. With a multimeter set to continuity/ohms you can check whether the timer motor and internal switch contacts have continuity where the diagram indicates. With power re-applied (only if you know how to do safe live testing), you can verify that line voltage is being applied to the timer and that the timer is outputting voltage to the appropriate circuits as it advances. If the timer motor has no continuity or the internal switching does not occur as the timer advances, the timer is likely defective. If you’re not experienced with live electrical testing, have a qualified technician perform the tests.
Can I replace the 807387501 timer myself and what are the general steps?
Yes, a competent DIYer can replace it, but always disconnect power first. Typical steps: remove the control panel or access cover, photograph or label all wire connections, disconnect the harnesses, remove mounting screws and swap the old timer for the new unit, reattach wires per your photos/labels, reassemble the panel and restore power. After replacement, run a short cycle to verify correct operation. If you’re unsure, hire a technician.
How do I confirm that 807387501 is the correct replacement part for my Frigidaire dishwasher?
Confirm the model number of your dishwasher (usually on the tub or door edge) and check Frigidaire’s parts lookup or an authorized parts dealer. Cross-reference the model number with part 807387501 to ensure compatibility. The parts diagram or service manual for your specific model will show the exact timer part number required.
Coudl other components cause the same problems as a faulty timer?
Yes. Faults in the door latch/switch, thermal fuse, float switch, control board, wiring harness, wash motor, or drain pump can mimic timer failure. Always perform or request a full diagnostic to isolate the root cause before replacing the timer.
Is 807387501 an OEM part and are aftermarket timers acceptable?
807387501 is an OEM Frigidaire part number. Aftermarket timers may be available, but OEM parts are recommended for exact fit and behavior. If using an aftermarket unit, verify the wiring, mounting and timing functions match the OEM unit and that it has a warranty.
Any safety or warranty considerations I should know about when replacing the timer?
Always disconnect electrical power before working on the dishwasher. Take pictures or label wires before disconnecting.If the appliance is under warranty, replacing parts yourself may void certain warranty terms-check the warranty first. Use proper replacement parts and follow manufacturer or qualified technician instructions to avoid damage or injury.
In Retrospect
The 807387501 Frigidaire dishwasher timer serves as a central timing and sequencing component that coordinates wash cycles, controls motor and pump operation, and governs when valves and heating elements engage. Its proper operation is integral to consistent cleaning performance, efficient water and energy use, and the reliable start-to-finish execution of the appliance’s programmed cycles.
Because symptoms such as erratic cycle advance,failure to start or complete cycles,or repeated short cycles can stem from a range of parts or wiring issues,careful diagnosis is crucial to determine whether the timer is the root cause. Confirming the fault before replacement reduces unnecessary parts expense and helps ensure the underlying problem is resolved rather than masked.
When diagnosis indicates the timer is defective,replacing it with the correct 807387501 component or an equivalent manufacturer-approved part restores intended function and helps maintain the dishwasher’s performance and safety. For accurate assessment and installation, engaging a qualified service technician is recommended to ensure correct identification of the fault and proper replacement procedures.
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
.
Recommended Products
The Blincoo Elite 48" Heavy Duty Dog Rope Toy is made for large breeds that love tug-of-war, chewing, and active play. Strong, simple, and fun for powerful dogs.
Shop on TikTok