Free Shipping $49+
Factory Direct No Middleman
30-Day Returns
24/7 1-800-HEIMA-00
Microwave runs normally (light on, turntable spinning, timer counting) but food remains cold — the magnetron has failed and is no longer generating microwave energy.
Food takes significantly longer to heat than usual, or heats unevenly with cold spots, indicating the magnetron is producing insufficient power output.
Unusual loud buzzing or humming sound during microwave operation, often accompanied by reduced or no heating, is a classic sign of magnetron degradation.
Arcing or sparking visible near the waveguide cover or interior walls can result from a failing magnetron with a damaged or cracked antenna seal.
💡 Pro Tip: How to Confirm Your Magnetron Has Failed
Your part is likely the culprit if you notice any of the following:
⚠️ Microwave runs (turntable spins, light on) but produces no heat whatsoever
⚠️ Food heats very slowly or unevenly compared to normal operation
⚠️ Loud buzzing or humming noise during cooking cycles
⚠️ Sparking or arcing visible inside the microwave cavity near the waveguide cover
🔬 Technician's Tip: Before condemning the magnetron, always test the high-voltage capacitor, HV diode, and thermal fuse first — they fail far more often and cost much less to replace. To confirm magnetron failure: measure resistance between filament terminals (should be <1Ω); then measure between either filament terminal and the magnetron chassis (should read infinite/open). If you get a low or zero reading on the chassis test, the magnetron is shorted and must be replaced. CRITICAL: Microwave HV capacitors can retain a lethal charge even when unplugged — always discharge the capacitor before touching any internal components.
📦 What's in the Box
✅ 1× Replacement Microwave Magnetron Tube (2M319J type, ~1000W, 2450 MHz)
⚠️ Note: Mounting screws and thermostat/thermo-protector are NOT included. Reuse your original hardware from the old magnetron.
We typically respond within 1 business day. Include your appliance model number for the fastest answer.
Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.
Reviews
There are no reviews yet.