Intro: If your microwave turns on but doesn’t heat, the issue is usually internal — but check these first.
1. Try a different container
Metal or thick plastic blocks microwaves.
2. Check the door seal
If the door doesn’t close properly, it won’t heat.
3. Reset the microwave
Unplug for 5 minutes.
4. Test with a cup of water
If it stays cold, the magnetron may be faulty.
5. When to call a technician
Microwave repairs should always be done professionally.
Summary: Most non‑heating microwaves have door or internal component issues.