I have a Speed Queen BX218 commercial grade non coin-op washer. It continuously drains as it fills and won’t stop. I’m a auto tech, not appliance repairman. So I need a little help here, can anyone give me guidance on how to diagnose/fix? Thanks!
In this situation the likely problem is that you have created a siphon effect with the drain hose. It may be in too deep or too tight, not letting air into the drain pipe.
See if correct that doesn’t fix things.