Wall Oven or Microwave Not Heating? Magnetron WG02F13440 – Fix No-Heat Fast
When your GE wall oven or built-in microwave runs but produces no heat, the magnetron is the primary suspect. In most GE microwave and combination wall oven units, this is caused by a failed magnetron tube. When it fails, the unit powers on, the turntable spins, and the light works — but food stays cold because no microwave energy is being generated. ⚡ Common failure point in GE-built microwave and combination oven units. Part WG02F13440 is the genuine OEM replacement magnetron that restores full heating performance — direct fit, no modifications required.
❓ Is This the Right Part?
This is the correct fix if ALL of the following are true:
- ✔ Your unit powers on, the display works, and the turntable runs normally
- ✔ The door switches and interlock system test OK
- ✔ The high-voltage diode and capacitor have been tested and confirmed good
- ✔ ONLY problem is no heat output — magnetron confirmed failed via continuity or HV test
Not sure? Send us your model number — we'll confirm before you order.
🔧 Common Symptoms
- Microwave or wall oven runs but produces no heat
- Food is cold after a full cook cycle
- Unit hums loudly but doesn't heat
- Burning smell from the magnetron area
- Unit trips the breaker when attempting to heat
- Sparking or arcing inside the cavity (magnetron antenna damage)
✔ If these symptoms match, this is the most likely failed component in the system.
✔ In most cases, replacing this magnetron restores full heating performance immediately.
📦 Part Details
- Part Number: WG02F13440
- Type: Magnetron — generates microwave energy for cooking and heating
- Replaces: WG02F13440 (OEM direct)
- Brands: GE, Hotpoint, RCA, Moffat
Always test the high-voltage diode and capacitor before installing a new magnetron — a shorted diode or failed capacitor is the most common cause of magnetron burnout and will destroy a new unit within weeks if not replaced at the same time. Both parts are inexpensive and should be treated as a kit replacement.
⚙️ Installation
Skill Level: Advanced — 45–60 minutes. Disconnect power and discharge the high-voltage capacitor before servicing — the capacitor stores lethal voltage even when unplugged. Remove the outer cabinet, disconnect the HV harness and waveguide, unmount the magnetron, and reverse to install. If you are not comfortable working with high-voltage components, professional installation is strongly recommended.
✓ Compatible Models
Confirmed compatible with select GE and Hotpoint wall oven and combination microwave models. Contact us to verify your model number before ordering.
💡 Pro Tip
The high-voltage capacitor in a microwave can hold up to 2,100V DC even after the unit is unplugged. Always discharge it using an insulated screwdriver or a purpose-built discharge tool before touching any internal components. This is not optional — it is a life-safety step. Never skip it.
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
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