I have a Neptune stacked washer and dryer front load and when the cycle completes there is a pool of water and the clothes are soaked. After listening to it, seems its not initiating the spin cycle. What does this mean? Before I spend 200+ dollars to have a service done, what can I check?

MLG2000A - Maytag Neptune Super Stack SL-3
1 - Select Wash/Rinse Water Temperature
2 - Select Options (Max Extract, Extra Rinse, Signa)
3 - Select Cycle
4 - Load the Clothes Washer (add detergent on top of the load in the tub, and additives [fabric softener, bleach] in their dispensers).
5 - Start the washer.
This is according to the owner's manual I have. Has worked for 14 years for me.

you have blocked filter

You need to clean the stationary "brush" that collects lint and debris from the water during the cycle. The brush can be seen around the tub directly touching it along the bottom/front of the device. Right were I pour my detergent in, after the cloths are in there. To remove the debris I use a bottle brush. You can expect to use trial and error for your attempts. As far as the water being left.... My device has always left water in the bowl. I periodically just run a cycle with no cloths and bleach...HOT.....Mine is not spinning at the moment...again....I think its another call to the local dealer....AGAIN....

If motor is not gaining speed during spin check the capacitors.

Is there a motor noise?
Could be belt issue if there is a motor noise and no spin.

Try extra detergent in a load and oxyclean. It might take 2 wash cycles. Good luck!

check to make sure the door is locking when it should. If the door isn't locking or sensing that its locked the washer will not go into high speed spin.

I had a similar problem, My washer spun but the clothes were still soaked with water. We replaced the inertia switch. That solved it.

You put the detergent directly on top of the clothes.

MLG2000A - Maytag Neptune Super Stack SL-3
1 - Select Wash/Rinse Water Temperature
2 - Select Options (Max Extract, Extra Rinse, Signa)
3 - Select Cycle
4 - Load the Clothes Washer (add detergent on top of the load in the tub, and additives [fabric softener, bleach] in their dispensers).
5 - Start the washer.
This is according to the owner's manual I have. Has worked for 9 years for me.