Hi @sissysue ,

Generally with fuses as long as you replace it with a fuse having the same rating it is OK to do so. Although ceramic fuses do offer better thermal and arc protection than glass fuses which is why they’re used in microwave ovens and other high current appliances.

The fuse is a 250V 20A slow blow fuse. It is usually marked on the fuse end caps as 250V T20A (T = Timed or slow blow)

Be aware that there is always a reason why a fuse blows.

If you caused it by pushing on the control panel then it seems that the problem may be there and that there is not a problem with the fuse as it was only doing what it was designed to do i.e. blow and therefore protect the appliance from further damage due to the fault and also the user e.g. possible fire or electrocution. It also may be somewhere else and it was just coincidental that it occurred when you did this.

The oven would need to be tested to find out why it happened.

Be safety aware when working inside a microwave oven. The HV capacitor can store >6000V DC for months even if the power has been disconnected for this length of time. This amount of voltage can seriously injure you or worse. The HV capacitor needs to be correctly discharged as soon as it is accessible after removing the cover from the microwave and before doing anything else inside the oven.

If you don’t know how to safely test microwave oven circuits then don’t do it! Contact a reputable, professional appliance repair service and ask for a quote