A122BA Whirlpool Radiant Module Cartridge Black is a replaceable electronic control assembly used in Whirlpool electric cooktops and ranges to manage a single radiant heating zone. The cartridge is a compact module-typically finished in black packaging-that contains the switching and sensing components required to control the ceramic-glass radiant element; it is designed to be mounted at or beneath the element location and to plug into the appliance’s internal wiring harness or control carriage.
Within the appliance the radiant module cartridge mediates power delivery to the heating element and provides status feedback to the main control circuitry. It interfaces electrically with the user control surface or touchpad, the main control board, the radiant element itselfand any associated temperature or overtemperature sensors or safety interlocks. By performing switching, current sensingand signal-level reporting it affects temperature regulation, element cyclingand safety cutout behavior; a malfunctioning module can produce a cold element, an element stuck on, error codesor intermittent operation depending on the failure mode.
In this article readers will find a clear technical description of how the A122BA module functions and how it fits into the cooktop control system, guidance on compatibility and identifying equivalent part numbers, common failure symptoms to look for, diagnostic checks and troubleshooting approaches appropriate for technicians and experienced appliance ownersand practical replacement considerations such as connector type, mounting, safety precautionsand verification steps to ensure correct installation. The coverage focuses on functional and diagnostic information rather than promotional claims.
Table of Contents
- Function and Role of the Radiant Module Cartridge in Range Control Systems
- How the A122BA Whirlpool Radiant Module Cartridge Black Operates Within Cooktop Electrical and Control Circuits
- Common Failure Symptoms and Diagnostic Indicators of Radiant Module Cartridge Faults
- Replacement Considerations, Compatibility and Installation Procedures for the Radiant Module Cartridge
- Q&A
- Closing Remarks
Function and Role of the Radiant Module Cartridge in Range Control Systems
The A122BA Whirlpool Radiant Module Cartridge Black is a compact, field-replaceable module that sits between the surface-element infinite switch and the radiant heating element in many Whirlpool electric ranges. The cartridge contains the switching element (mechanical contacts or a triac-based solid-state switch depending on production run),the line/load terminals,and a small amount of diagnostic/protection circuitry; its primary role is to modulate mains power to the radiant element according to the user-selected setting while providing a defined mechanical and electrical interface to the cooktop harness. Becuase the cartridge supplies and interrupts full element current,its terminal layout,mounting tabs and connector keying determine compatibility between different range models and replacement parts,so correct part number and housing orientation matter for safe operation and proper diagnostics.
In service, the module’s behavior is straightforward: a commanded input from the infinite switch causes the cartridge to apply power to the elementand internal protection or contact wear can produce several measurable failure modes.Typical technician checks include verifying supply voltage at the cartridge, measuring continuity through the cartridge when calling for heatand inspecting connector pins for corrosion or overheating. When replacing the cartridge, isolate mains power, label or photograph terminal wiring, transfer the cartridgeand verify performance at multiple power settings; if problems persist after replacement, confirm the element resistance and the harness wiring to avoid misdiagnosing the control module. Practical examples of symptoms and functional roles are listed below.
- Common symptoms: no heat on one element, continuous full-power heat, intermittent cyclingor visible arcing at cartridge terminals.
- Functional points: switching of line/load current, mechanical mounting and connector keyingand thermal/contact wear limits that determine service life.
- Replacement checks: match part number and terminal arrangement, verify element resistanceand test with controlled power application after installation.
| Item | Description |
|---|---|
| Voltage | Typically 240 VAC supply for single radiant elements (verify model-specific rating) |
| Function | Interrupts/modulates mains current to element and provides connector interface |
| Compatibility | Keyed housing and terminal arrangement determine fit with specific Whirlpool range harnesses |
How the A122BA Whirlpool Radiant Module Cartridge Black Operates Within Cooktop Electrical and Control Circuits
The A122BA Whirlpool Radiant Module cartridge Black functions as the high-current interface between the cooktop control electronics and a radiant surface element. In typical installations the module provides the mechanical terminals and conductive path that carry line voltage to the element, plus discrete connector pins for the control board’s switching device (triac or relay) and any element temperature sensor or thermal cutoff. Electrically, it is not a logic device but a ruggedized terminal/switching assembly sized for mains currents; correct compatibility requires matching terminal layout, mounting geometryand current/voltage ratings to the specific Whirlpool cooktop model so that control signals and protective sensors remain correctly routed and insulated.
In operation the control board issues a switching command that causes the board’s power device to apply mains potential through the module to the element; a technician verifying operation will measure line voltage appearing at the module’s element terminals only when the board is calling for heat. Common practical checks include continuity across the element terminals when de-energized, voltage presence at the module during a heat call, and inspection of contact integrity and sensor wiring for intermittent faults. Typical symptoms of module-related faults are no heat despite correct control commands, continuous heating because of a stuck contactor erratic element cycling caused by poor connections; replacement units must match the module’s current rating and terminal configuration to avoid miswiring or thermal stress.
- Primary functions: mains switching path, element and sensor terminals, mechanical mounting and insulation.
- Typical diagnostic checks: continuity, voltage under call-for-heatand connector integrity.
- Failure modes: open circuit, welded/stuck contacts, degraded insulationor loose harness connections.
| Item | Description |
|---|---|
| Typical operating voltage | 208-240 VAC (split-phase systems common in North America); verify model-specific rating before replacement |
| Common diagnostic check | Measure mains voltage at module element terminals while the control board is commanding heat; test continuity when de-energized |
Common Failure Symptoms and Diagnostic Indicators of Radiant Module cartridge Faults
The A122BA Whirlpool Radiant Module cartridge black is a cartridge-style switching and thermal assembly used in compatible Whirlpool radiant cooktops to control a single heating element. in practice this module houses the switching contacts, a temperature-sensing/limit device, and the connector interface that mates with the appliance harness; failures therefore produce either loss of heat, uncontrolled heatingor intermittent operation depending on whether the contacts, sensoror connector is degraded. Compatibility is mechanical and electrical – the cartridge must match the cooktop’s mounting, terminal layoutand the element’s voltage/wattage rating; installers should verify terminal arrangement and harness pinout before replacement to avoid miswiring or mismatched thermal characteristics.
- No heat or partial heat: cooktop element receives supply voltage but shows high resistance or open continuity across the cartridge or element.
- Intermittent heat or cycling: thermal sensor or internal contacts are failing, causing the circuit to open and close unpredictably.
- Visible damage or burning: melted housing, scorch marksor corroded terminals indicate electrical arcing or overheating within the cartridge.
- Tripped breakers or erratic control signals: shorted contacts or internal faults can cause excessive current draw or communication faults with the main control board.
| Item | Description |
|---|---|
| Expected element resistance | Typical resistance depends on element wattage (example: ~23 Ω for a 2,500 W element at 240 V); compare against element spec sheet. |
| Voltage check | Measure applied voltage at cartridge terminals under demand (single element systems often ~240 VAC across element); absence of voltage isolates control board or supply. |
Diagnosing a failing cartridge begins with a targeted sequence: visually inspect the A122BA Whirlpool Radiant Module Cartridge Black for physical damage and secure connector seating,then perform continuity/resistance checks across the element and thermal sensor using a calibrated meter. If the element shows expected resistance but no heat, measure line voltage at the cartridge under a call for heat; presence of voltage with an open element or sensor indicates a cartridge/component failure, while absence of voltage points to upstream control or supply issues. Practical workflow includes documenting measured resistance values,comparing them to element ratings,swapping with a known-good cartridge of the same part number when available,and ensuring proper torque and corrosion-free terminals during replacement to prevent repeat failures.
Replacement Considerations, Compatibility and Installation Procedures for the Radiant Module Cartridge
The A122BA Whirlpool Radiant Module Cartridge Black acts as the electrical switching and diagnostic interface between the cooktop control electronics and a radiant heating element. It typically houses the solid‑state or electromechanical switching device, suppression components and sensor/feedback terminals; the black finish is cosmetic and does not affect function. Compatibility requires matching the cartridge’s physical mounting, connector pin‑out and stamped electrical ratings with the appliance harness and control board, since identical housings can contain different internal wiring or component values across service revisions.
Disconnect mains power and follow a documented disassembly sequence before replacing the cartridge. Photograph and label each harness and terminal, remove screws and thermal pads so they can be inspected or replacedand ensure the replacement cartridge seats flush and connectors engage fully; torque mounting hardware to avoid mechanical stress. after installation perform continuity and insulation checks, a low‑power functional test of the element controland verify that the control board reports no diagnostic fault codes before returning the appliance to service.
- Isolate power, photograph and label harnesses
- Remove cartridge, transfer/replace insulating pads and gaskets
- Install new cartridge, seat connectors and torque fasteners
- Measure continuity, insulation resistance and perform low‑power functional test
- Confirm no fault codes and recheck after first heat cycle
| Item | Description |
|---|---|
| Voltage rating | Typical line voltage (e.g., 208-240 VAC); verify stamped rating on the cartridge |
| Current rating | Rated for the element it controls; commonly in the 15-40 A range depending on element size-confirm service specifications |
| Connector type | Spade or multi‑pin harness; confirm pin mapping against appliance wiring diagram |
Q&A
What is the A122BA Whirlpool Radiant Module Cartridge Black?
The A122BA is a radiant surface control (often called an infinite or cartridge switch) used on certain Whirlpool electric ranges. It is the user-operated control that regulates the power to a radiant (glass-ceramic) cooktop element and is typically sold as a black replacement cartridge assembly that mounts behind the control knob.
What symptoms indicate the radiant module cartridge is failing?
Common signs include a burner that will not heat at all, a burner that stays on or does not turn off, only some heat settings working, erratic or intermittent heating, visible arcing or a burning smell near the controlor a knob that feels loose or does not click through settings. These symptoms can point to a faulty cartridge but could also be caused by wiring or the element itself.
How do I test the A122BA radiant module with a multimeter?
Always disconnect power before testing. Remove the knob and access the cartridge terminals. With a multimeter set to ohms, check for continuity between the common terminal and the selectable output terminals while turning the shaft through settings; you should see different resistances/continuity corresponding to positions (low to high). an open circuit on all positions or inconsistent readings usually indicate a bad switch. Also check for shorts to ground – there should be none. If you are unsure how to interpret readings, compare to a known-good switch or consult a technician.
Which Whirlpool models is A122BA compatible with?
Compatibility varies by model and production date. Do not rely on appliance appearance alone – confirm compatibility by matching the original part number on the existing switch or by entering your range’s full model number into an official Whirlpool parts lookup or a reputable parts supplier. That will ensure you order the correct cartridge for your specific range.
Can I replace the radiant module cartridge myself,and what tools are needed?
Yes – a competent DIYer can usually replace it. Typical tools: screwdriver set (Phillips and flat), needle-nose pliersand possibly a nut driver. Turn off the range power at the breaker, remove the control knob, pull or lift the cooktop or control panel as needed to access the cartridge, disconnect wiring (label or photograph the connections), remove and swap the cartridge, then reconnect and reassemble. Expect about 30-60 minutes depending on your model and access. If you are uncomfortable with electrical work, hire a qualified technician.
What safety precautions should I take before and during replacement?
Disconnect power at the household breaker (do not just rely on the range’s controls). Allow the cooktop to cool completely. Label or photograph all wire connections before disconnecting. Wear gloves and eye protection to avoid cuts from edges. Verify power remains off with a non-contact voltage tester.Reconnect power only after the cartridge is securely installed and all panels are reattached.
Is there a difference between OEM and aftermarket A122BA cartridgesand should I buy OEM?
OEM (genuine Whirlpool) parts are made to original specifications and generally offer guaranteed fit and function with the manufacturer’s warranty. Aftermarket cartridges may be lower cost and can work fine, but quality and terminal layout can vary. If you want the highest assurance of fit and long-term reliability, choose the OEM part; otherwise confirm fit and warranty terms from the aftermarket supplier before buying.
After replacing the cartridge the burner still doesn’t work – what else should I check?
If a new cartridge doesn’t fix the problem, check the surface heating element for continuity and physical damage, verify the element connector wiring and terminal block for corrosion or loose connections, inspect fuses/thermal cutoff devices on your range (if present)and ensure the control harness and main power supply are intact. If wiring, harnessesor control boards are damaged, those may need repair or replacement by a qualified technician.
Closing Remarks
The A122BA Whirlpool Radiant Module Cartridge Black serves as a critical control and connection component for Whirlpool radiant cooktops, managing power delivery to heating elements and contributing to safe, consistent surface heat performance.As an integral part of the appliance’s control and safety circuitry, its proper function helps ensure accurate temperature response, appliance reliabilityand the prevention of electrical faults that can affect cooking results and user safety.
As symptoms of a failing module can resemble other component issues, accurate diagnosis is essential before replacement.Technicians should follow the manufacturer’s diagnostic procedures, use appropriate testing toolsand confirm part compatibility. When replacement is necessary, installing the correct A122BA cartridge and verifying operation after service restores intended performance, helps maintain appliance longevityand reduces the risk of repeat failures. Engaging qualified service personnel and using specified replacement parts supports both safety and long-term reliability.
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
.
