Maytag D/W not draining

I know this is a vintage appliance but it has been working very well (belt and door seal replacement a couple of years ago) but it now stopped draining after the wash cycle. It seems to be recycling the wash water when you start the cycle from the begining instead of pumping out. The pump and controls appear to be functioning properly. Any suggestions as to what could be at fault? :confused: Thanks in advance, Cooter Model WU202 Serial# 210097 VC Series 01

Okay found the problem! I remoned the drain hose and blew compressed air through and now it drains as new.
Cooter