I need a replacement fuse for a Rival Microwave .7 cu ft oven. 15A, number is 250U. Can you help me locate?

Question edited for clarity and add MAKER!

Replacements

https://www.google.com/search?q=whirlpool+30+over+the+range+microwave

They all come in standard widths. Any 30" microwave should be fine.

Whirlpool MH2175XST
1.7 Cu. Ft. Over-the-Range Microwave with 1,000 Cooking Watts, Warm Hold Cycle and Sensor Cooking Cycles: Bisque 4.6 quick specs
Style: Over the Range
Width: 29 7/8 Inch
Depth: 15 3/4 Inch
Height: 17 1/8 Inch
Capacity: 1.7 Cu. Ft.

Try unplugging from power. Wait a bit. Plug back in. Push clock button and see if that works. Good luck.

What kind of cover? Is it a greyish/tan cover on the inside of the oven cavity on the right hand side? If so, it's called the waveguide cover. I'm guessing it started arcing and burning... try 'googleing' the model number to see if you can find any information on it.
Call Appliance Factory Parts in Denver to see what they can find for you 303-761-1111. Or look them up on the web...

The unit is not producing microwaves, therefore replace it.

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Bad element. Replace.

Rival
c/o JCS/THG, LLC
13120 Jurupa Avenue
Fontana, CA 92337
Telephone: 1-800-323-9519

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 ;''
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This will occur if the inverter has experienced a surge or, if the cut off fuse has blown. you can check the cut-off fuse by removing the cover. it is located near the magnetron tube. replace it if it is blown. if the fuse is ok, this will confirm inverter failure. replace the inverter in this case.