Electronics > RF, Microwave, Ham Radio

Microwave not heating

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CaptDon:
If the magnetron ever overheated one or both ceramic magnets may have cracked. In that case the magnetron is dead!! How much line current does the unit draw?

james_s:

--- Quote from: CaptDon on May 20, 2023, 10:01:59 pm ---If the magnetron ever overheated one or both ceramic magnets may have cracked. In that case the magnetron is dead!! How much line current does the unit draw?

--- End quote ---

I don't think I've ever seen that happen but I suppose it's possible. I have several magnets from defunct magnatrons on my fridge. I paint them with a thick coat of enamel to prevent them from chipping and they make good strong general purpose magnets.

TERRA Operative:
Check out this website, it has all the info you need to fix a microwave:

https://www.repairfaq.org/sam/micfaq.htm

tkamiya:
If the bowl containing water is heating up, obviously, rest of the system is producing RF at least.  So first thing I would try is use different vessel to hold water and see how it performs.  I have a set of PLASTIC bowls that act like this. 

james_s:
Oh I missed that part, yeah if the bowl is heating then the microwave is working, definitely try a different bowl.

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