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Question DetailsAsked on 3/14/2016

no hot water coming out of faucets thru out the house after refiling tank and heating water

drained water heater and water lines for the winter. hooked very thing backup, turned on water to fill up pipes and water heater, turn on water heater to heat up water but the hot water lines do not fill and no water at all sinks

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2 Answers


Check along the line for where blockage is - check for water at hose bibs, water heater drain, interior faucets.

Assuming the pipes have totally thawed out, and assuming you have opened up the various faucets to release the air in the pipes and flush them out, failure of hot water only would normally be a blocked outlet tube from the hot water heater (if water comes out drain valve but nowhere past the heater). If not coming into the heater but cold water is getting into house, I would suspect a blocked expansion tank outlet. Usually caused either by long-term buildup of minerals/iron algae, but occasionally by broken plastic cold water fill tube floating up and blocking outlet fitting.

No water at all to sinks, again assuming you have let it run to drain the air in the lines, would normally indicate a blocked/correded shut pressure regulator or backflow preventer on the incoming line - but in that case you would have no water anywhere in the house.

One other possible cause - water treatment system frozen, corroded up, or valves damaged by freezing - try bypass valve to see if that is the source of blockage.

If you can't tie down a cause by running water in every usage/drain point and making sure no lines are still frozen (and that you don't have broken pipes leaking because they were not fully drained or incoming shutoff valve leaked water into the system so froze and split), then you need a Plumbing contractor.

BTW - make sure the water heater (including any point-of-use or tankless ones) and boiler actually are full of water before turning on the heat.

Answered 3 years ago by LCD


Sounds like you may have a shutoff valve into or out of your hot water heater that is closed, not allowing water to enter the hot water system. Or, open a hot water tap to let air out of system as you have water come in. Good luck.

Answered 3 years ago by SalisburySam

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