Dawn. The answers to most of your question have been given by Fred in the post above. Should all other functions be working I would think the most likely cause is a partially clogged pump or filter followed by debris round the Eco Valve. The manual available at: - secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/eab852a13fbc842085256aa200643dd6/$FILE/Duet%20Job%20Aid.pdf
,,, on page 3-10 shows the position of the Eco Valve. Two words of warning, 1. Unplug the machine prior to working on the internals. 2. Even when the machine is working correctly there is still quite a bit of water 'left in the system' and removing the filter, pump or Eco Valve can put this on the floor, so be prepared. Should the drain system not be totally blocked, and from what you have said it is not, one way of alleviating this problem is to suck the water out with a Wetvac, just insert the end of the Wetvac suction into the open end of the discharge hose and turn the WetVac on, close off the gap round the discharge hose and the Wetvac suction with your hand. Good Luck and please let us know how you get on.