The water Drains slowly from the whirlpool. How do I clear the drain so the water can drain properly?

At the end of the wash/rinse programmes the drum would turn slowly while the pump removes the majority of the water and when the tub is virtually empty the drum will begin building speed over time until the spin speed is reached. The pump remains running until the end of the spin. That is how things usually go.

An automatic washer doesn't drain - it is pumped out!

Your description suggests either there is something wrong with the pump or programmer.

best to take the top off by removing the bolts in the back the slide it to the back then off.you then can get to the hose and remove it.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/dude_653d05454b389bba

check the discharge hose in the rear make sure no kinks or there could be something in the pump. if it drains slowly i'd say check for kinks. a whining noise while it's draing cloged pump

under the decorative knob there is a screw,this is what holds the stopper in place.if not it should just unscrew.

check to make sure there is any thing in drain

Use the attached video to show you how to access the inside of the machine.Ignore the other parts other than access and re-assemly.

You may have something obstructing the flow of water through the drain hose. You need a tech to check where the problem is.
http://tclaundryrepair.com/

F/H is a no water fault code, so i would recheck your incoming water supply, or look to a problem with the inlet water valve.. if your using stainless steel hoses, form the manufacture lableld FLOOD SAFE, these maybe your issue as well they have a buitl in water shut off, htat may be failing preventing water from entering

blockage in the drain hose somewhere