Can you post the model number of the appliance please?
It's on a label on the right wall of the fridge.
You have to remove the top drawer to view it.
Was the machine making ice before you replaced the filter?
Is it dispensing water?
Is the light on orange or definitely red?
OK, thanks for that.
Do you have a button marked OK?
If you do, press and hold this till the light goes green.
If you don't, there should be a button next to the filter light marked reset.
Press and hold this till the light goes green.
Unfortunately I can't get a user manual from Whirlpool online for your model.
Hope this helps
Let me know how it goes or if you need more help
All I can tell you is, when I worked for Whirlpool we had a lot of call outs for filters not resetting.
They had to change the orange led on the newer machines as it was a dark orange and was mistaken for red.
If your machine has the dark orange led, then it won't reset until the led changes to dark red. (Hope that makes sense).
It's not the reset alarm button, that's the middle of the panel, it's the reset button next to the filter light.
Unfortunately the user manual for your appliance isn't available so I can't see which facia panel your machine is fitted with.
Check that the filter light isn't a button too.
Good luck with it.