Microwave No heating & stops in 20s

[PKG]

Hi

I have approx 2 years old Panasonic 42L 1000W convection microwave.
Last week it just stopped heating and turns off after 20s no matter how much time you set.

I opened and checked resistance across magnetron, which shows less than 1 ohm.

Please help. Wife's threatening!

PKG

[DIY Guy]

The microwave is the single most deadly appliance in most peoples home. The magnetron has enough stored power (even when unplugged) to fry a person. We do not recommend opening / testing / or repairing a microwave other than cosmetic exterior components.