WP4449751 Genuine OEM Whirlpool Oven High Limit Thermostat
The WP4449751 is a Genuine OEM Whirlpool replacement oven high limit thermostat compatible with a wide range of Whirlpool, KitchenAid, Maytag, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore ovens, wall ovens, microwave-oven combinations, and ranges. The high limit thermostat is a critical safety device mounted near the oven cavity — it continuously monitors the oven's temperature and cuts off electrical power to the heating element if the oven exceeds its safe operating temperature. When the oven temperature drops back to normal, the thermostat closes and allows normal operation to resume. This backup safety layer protects against fires, damage to the oven, and unsafe cooking conditions when the main temperature control fails.
Rated to trip at approximately 335°F (170°C). Common causes for the high limit thermostat to trip include a faulty control board, cooling fan failure, blocked ventilation, poor door sealing, disrupted air circulation, or an abnormal self-cleaning cycle. As a Genuine OEM part manufactured by Whirlpool to factory specifications, the WP4449751 directly replaces 4449751, 1550872, AP6009390, AH2375382, EA2375382, PS2375382, PS11742549, EAP11742549, and AH11742549. Installs in 30–45 minutes with basic hand tools by experienced DIYers. This is a safety component in a 240V oven circuit — proceed only if you're comfortable with high-voltage electrical work, or call a qualified appliance technician.
Quick Answer
The WP4449751 Genuine OEM Whirlpool Oven High Limit Thermostat fixes Whirlpool, KitchenAid, Maytag, Jenn-Air, Amana, and Kenmore ovens with symptoms including oven not heating, oven overheating, uneven heating, oven failing to start, and self-clean door won't unlock after cycle. 335°F (170°C) trip temperature — cuts off power to heating element on overheat, then resets when temperature returns to normal. Genuine OEM. Replaces 4449751, 1550872, AP6009390, AH2375382, EA2375382, PS2375382, PS11742549, EAP11742549, AH11742549. Compatible with WOS/WOD wall ovens, KOSE/KODE/KOCE series, JJW/JMW/JDRP/JDR series, and many more.
Common Problems This Part Fixes
- Oven not heating at all — high limit thermostat tripped open
- Oven overheating — thermostat failing to trip when needed (rare failure mode)
- Inconsistent oven temperatures leading to undercooked or overcooked food
- Oven fails to start when powered on
- Oven door won't unlock after a self-cleaning cycle completes
- Uneven heating — hot spots or cold spots inside the oven cavity
- Oven cuts off heat mid-cycle without reaching set temperature
- F-code or thermostat-related error displayed on the control panel
- Multimeter continuity test on the thermostat shows an open circuit at room temperature
- Visible damage or discoloration on the thermostat housing from a prior overheat event
Cross Reference Information
Part numbers can change over a product's lifecycle as manufacturers update designs or release new appliance models. For your convenience, we've included any known superseded, alternate, or cross-reference part numbers that match this item.
Replaces Part Numbers
This oven high limit thermostat directly replaces the following OEM and cross-reference part numbers:
WP4449751, 4449751, 1550872, AP6009390, AWP47600, EAP2375382, PD00025977, PS11742549
If your part number is not listed above, contact our support team before ordering and we will verify compatibility.
Compatibility
This high limit thermostat is compatible with select ovens, wall ovens, ranges, and microwave-oven combinations from the following brands:
- Whirlpool wall ovens — WOS series (WOS31ES0JS, WOS51EC0AS, WOS51EC0HS, WOS51EC7HW02, WOS51EC7HW21, WOS72EC0HS/HV, WOS72EC7HS/HV, WOS92EC0/EC7 all revisions, WOS97ES0ES series)
- Whirlpool double wall ovens — WOD series (WOD51EC0AW03, WOD51EC7HS, WOD93EC7AS)
- Whirlpool combination wall ovens — WOC54EC0/EC7 series
- KitchenAid wall ovens — KOSE, KODE, and KOCE series (KOSE500ESS, KODE500ESS, KOCE500ESS, KOCE500EBL00/EBL01/EBL02/EBL04/EBL05)
- Jenn-Air wall ovens — JJW, JMW, JDRP, and JDR series (JJW2427DB/DS 00/01, JJW2430DS, JJW3430DS, JMW2430DS, JDRP430HL/HM 00/01, JDRP430WP00, JDRP436HL/HM/WP series, JDRP536HL/HM/WP series)
- Maytag wall ovens and ranges (select models)
- Amana wall ovens (select models — AWO6313SFB00/02, AWO6313SFS00/02, AWO6313SFW00/02)
- KitchenAid ranges — KDRS407 series (KDRS407VBK01, KDRS407VBU01, KDRS407VSS00)
- Whirlpool ranges — IBD350DS00, IBS300DS00, IBS350DS00 series
- Magic Chef, Admiral, Norge, Roper wall ovens (select Whirlpool-built models)
- Kenmore / Sears wall ovens (select Whirlpool-built models)
- Suitable for single or double electric wall ovens and microwave-oven combination units
Always verify your appliance model number before ordering. Contact our support team if you're unsure.
Key Features
- Genuine OEM part manufactured by Whirlpool to factory specifications — guaranteed fit and performance
- High limit thermostat (safety switch) — cuts off power to the oven's heating element when temperature exceeds 335°F (170°C) to prevent overheating damage or fire
- Auto-reset design — closes and restores normal operation when the oven temperature returns to safe range
- Precision-calibrated to Whirlpool factory specifications for accurate trip temperature and reliable safety response
- One-year Whirlpool warranty on Genuine OEM parts
- Replaces 4449751, 1550872, AP6009390, AH2375382, EA2375382, PS2375382, PS11742549, EAP11742549, and AH11742549
- Compatible with Whirlpool WOS/WOD/WOC series, KitchenAid KOSE/KODE/KOCE series, Jenn-Air JJW/JMW/JDRP/JDR series, plus Maytag, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore ovens
- Fits single wall ovens, double wall ovens, ranges, and microwave-oven combination units
- Resolves "oven won't heat," "overheating," "uneven heating," "self-clean door stuck locked," and "won't start" symptoms when caused by a failed high limit thermostat
- For experienced DIYers or qualified appliance technicians — this is a safety component in a 240V oven circuit
- Installation typically takes 30–45 minutes with basic hand tools
Product Specifications
| Part Number |
WP4449751 |
| Part Type |
Oven High Limit Thermostat (Safety Switch) |
| Condition |
Genuine OEM |
| Application |
Wall Ovens, Ranges, Microwave-Oven Combinations (Whirlpool platform) |
| Trip Temperature |
335°F (170°C) |
| Type |
Auto-Reset (closes when temperature returns to safe range) |
| Warranty |
One-Year Whirlpool Warranty (Genuine OEM) |
| Compatible Brands |
Whirlpool, KitchenAid, Maytag, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, Kenmore |
Installation Notes
⚠️ Turn Off Power at Breaker Before Starting — This Is a 240V Oven Circuit — Wear Work Gloves Disconnect power at the household breaker before beginning — this is a 240V circuit and there is a serious risk of electrical shock if power is not fully disconnected. Verify power is off with a voltage tester before touching any wiring. Wear work gloves and safety glasses. Allow the oven to cool completely before beginning (several hours after any recent cooking). The high limit thermostat is typically mounted on the rear or side of the oven cavity, accessed by removing the back panel of the appliance (for freestanding ranges) or the front trim/service panel (for wall ovens). The exact location varies by model — consult your appliance's service diagram before starting. Photograph all wire connections and mounting details before disconnecting anything. Disconnect the wire terminals from the old thermostat (typically two spade-terminal wires). Remove the mounting screws or clips holding the thermostat to the oven cavity, and lift it out. Install the new WP4449751 in the exact same position and orientation — the thermostat must be in good thermal contact with the oven cavity to function correctly. Secure the mounting hardware and reconnect the wires to their correct terminals. Reinstall the access panels. Restore power at the breaker and test the oven — start with a low-temperature bake cycle to confirm normal heating operation before running a high-temperature or self-clean cycle. Tools needed: Phillips screwdriver, 1/4" nut driver, voltage tester (essential), work gloves, safety glasses.
Frequently Asked Questions
Why did my high limit thermostat trip in the first place?
A high limit thermostat trips because the oven exceeded its safe operating temperature — meaning something upstream in the temperature control chain failed to shut off the heating element when it should have. Common causes are: a failed oven control board (relay stuck closed), a failed cooling fan (allowing the oven cavity or electronics to overheat), blocked or restricted ventilation, poor door sealing (letting the cavity overheat), disrupted air circulation, or an abnormal self-cleaning cycle. Before installing the new thermostat, investigate and address the underlying cause — otherwise the new thermostat will trip again in short order. Also inspect the ventilation, oven door gasket, and cooling fan while you have the appliance open.
What's the difference between a high limit thermostat and the operating thermostat?
These are two different components serving two different roles. The operating thermostat (or the oven control board with its temperature sensor) is the primary component that maintains the oven at your set temperature by cycling the heating element on and off during normal operation — it opens and closes at your selected temperature (e.g., 350°F). The high limit thermostat (WP4449751) is a backup safety device that only trips when the oven temperature far exceeds normal operation (335°F over the cavity's safe threshold), typically because the operating thermostat or control has failed. If the high limit thermostat trips, both need to be checked — the operating thermostat may also need replacement.
Does the high limit thermostat reset itself, or does it need to be replaced after tripping?
The WP4449751 is an auto-reset thermostat — it closes automatically once the oven cools back to a safe temperature, allowing normal operation to resume. If your oven is heating normally again after cooling, the thermostat is likely still functional (the underlying overheating cause needs investigation). However, if the thermostat has failed permanently open — often the result of repeated overheat events or age — it will need replacement. Test with a multimeter set to continuity: a working thermostat shows continuity at room temperature. If it reads open (infinite resistance) when cold, it has failed and needs replacement.
Why does my self-cleaning cycle leave the oven door locked and the oven won't heat?
This is a classic symptom of a high limit thermostat that tripped during the self-clean cycle. Self-cleaning cycles run at extreme temperatures (800–1000°F) and stress every component in the oven — if the ventilation, door gasket, or cooling fan can't keep up, the high limit thermostat will trip open. Once tripped, the oven can't heat OR unlock the self-clean door lock mechanism, leaving the door stuck closed. Once the thermostat cools and closes (or is replaced), the door lock releases and normal operation resumes. If self-clean cycles routinely trip the thermostat, investigate whether the ventilation, cooling fan, or door gasket are causing the problem.
Can I do this repair myself, or should I hire a technician?
Replacing an oven high limit thermostat is a manageable DIY repair for someone comfortable with mechanical work and electrical connections, but this is a 240V circuit and the thermostat is a safety component — any error can create a serious safety risk. If you have experience with appliance repair, follow the safety precautions carefully (breaker off, voltage tester, correct thermostat orientation), and can confirm the wiring connections are secure, this is a feasible DIY. If you've never worked with 240V appliance circuits before, hiring a qualified appliance technician is the safer option. Also identify and address whatever caused the original overheat event — otherwise the new thermostat will trip again.
Is this a Genuine OEM or aftermarket part?
This is a Genuine OEM part manufactured by Whirlpool to factory specifications. It is the exact same high limit thermostat installed in compatible Whirlpool, KitchenAid, Maytag, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore ovens from the factory — guaranteed fit, materials, and performance. Backed by Whirlpool's one-year warranty on Genuine OEM parts.
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