So it sounded like a kinked hose caused by the slide perhaps? The other thing that causes this is if the small vent line, which is typically located beside the fresh water gravity fill opening, fills with water so no air can escape as fresh tries to enter the tank. My ACE does that occasionally, but I can't easily get at the vent line to raise it over the fill line......so I just use a short piece of rubber hose and blow through it into the vent line.....forcing any water out of the vent line; restores the normal flow fresh water fill.
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