The homeowner complaint is that the dishwasher doesn’t seem to be draining I found water in the bottom of the dishwasher I disconnected the dishwasher drain from the ptrap and found the ptrap to be clear I forced the dishwasher to drain in a bucket and then hooked it back up to the ptrap and tested the dishwasher drained with no issues I ran it 3 more times with no issues The dishwasher drain line was air locked and could not push the water out By disconnecting the drain line I broke the air lock allowing the water to flow Job complete