During a period of non-use, a pump could occasionally become temporarily immobile and require a slight tap, or bump, to allow it to start turning over.
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Triple tap the power button to ignite the phx42.
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Sit the unit on a table. Pick up the machine (on the corner by the power button) about ½ an inch and drop twice.
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Triple tap to ignite again.
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Update the hardware issue to indicate the pump is functioning, or request additional assistance.