Turn off the pump. Turn off the water heater. Make sure you leave your low water drains and faucets open. Also, turn off city water supply and disconnect the city water. This will give room for ice to expand and help prevent a burst pipe. Turn off the pump.
Open all cabinet doors where plumbing might run (under sinks, etc.) and turn up the heat. Run an extra electric heater in the regular bays where water pipes might run. Then sit and wait, checking for thaw by turning on the pump every so often to check for flow. Make sure you have flow both on the hot and cold side at all locations.
When we used to be in potential freeze areas, we would always leave the doors under sinks open so that heat could get to those spaces.
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2005 Safari Cheetah 38PDQ - 2009 Ford Flex
Me (Gatogonow), The Boss (DW), Honey Bunny, Maggie May and Mollie Kay (The Gatos)!
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