The F33 error code indicates a pump drive system error. If the pump ohms out correctly & the harness is secure I recommend replacing the CCU (central control unit). Please see the image provided for instructions. Remember to
to the washer before attempting access.
I am also providing you a link to access & check the pump for the SD & F21 error codes.
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services
SAFETY NOTICE: Be sure to disconnect power to the appliance before performing any repairs. If you are not comfortable with doing any voltage checks that might be recommended, please contact your local service provider for repairs. Be aware that there could be sharp edges inside the appliance that could cause cuts or other injuries to yourself or others.
Kenmore washing machine not working.