Check your valves in the outside wet bay
We had a similar issue and the water valves for the little outside spray hose in the wet area, had the valves open, then the water just circulates and you may only get lukewarm water. Close these valves if they are open. If you are in a cool climate and the thermostat in the storage compartment is set above the ambient outside temperature, this can also cause it. Turn the thermostat lower or off if it is not freezing, but this time of year I doubt it is that cold!