Oasis 2708 is 3 years old. Washer stops at the beginning of the cycle and the F1 light comes on.

This is from a service bulletin. This may be of interest to you. There have been some problems with these machines in this area.
CORRECTION:
HE Top Load Washers
Models:
F1 Error Code
WTW6200S WTW6300S WTW6400S WTW6600S WTW6700T
MTW6300T MTW6400T MTW6500T MTW6600T MTW6700T
Serial Numbers: CT01 – CU52
There are four areas of concern that can cause the F1 Error Code. Each area must be sequentially addressed to ensure
that the diagnosis is correct and the proper repair is completed.
A) Air leaks in the air pressure (switch/sensor) hose.
a. Inspect the hose for cracks, pin-holes or loose connection.
b. Replace the hose and harness assembly (W10058730) if it is compromised.
B) Moisture in the air pressure (switch/sensor) hose.
a. Inspect the hose for evidence of water.
b. Replace the hose and harness assembly (W10058730) if water is detected.
C) Lint or flashing in the air dome hose connection port.
a. Inspect the air dome hose connection port for lint or flashing.
b. Use a small round device (small screwdriver) to ensure that there is nothing blocking the air dome outlet on
the tub.
D) The control needs to be replaced.
a. Replace the control only after you have completed steps A – C above, and verified that there are no issues
with the air pressure system.

I would attempt to contact the manufacturer and see if any repair/parts costs will be covered. Some folks have said that they had some costs covered, while others have stated that they got no assistance from them, so I don't know what the outcome will be, but it is worth a try in my opinion. Really sorry for your trouble and I hope this helped. Best wishes.