Do you hear any pump noise when you turn it on? Also, before it will pump water the remaining space in the water storage tank has to be pressurized. Depending on the amount of this air space on the top of the tank, it could take a couple minutes to begin circulating. And of course a faucet should be opened to allow the air to escape.
I have heard of a couple fixes for the water pump. On is to prime the pump by reversing the flow direction of the water. Do this by inserting water in through the sink faucet.
The second method is to lightly tap the water pump with the handle of a screw driver or some other tool.
Hal
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