Won't fill unless pressure value open


  #1  
Old 12-28-17, 11:57 PM
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Won't fill unless pressure value open

So I discovered that I had no water coming out of my faucet with hot water handle open. Went to the electric water tank to find it empty. Try a few things but there was no water coming in. However if I open the pressure relief value on the top water instantly starts to flow into the tank. But as soon as I close the valve it stops.
Any ideas? Could it be i need to replace the pressure relief or something else?

thanks

 
  #2  
Old 12-29-17, 12:18 AM
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You have frozen pipes??? Whats your location?
 
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Old 12-29-17, 12:38 AM
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I'm in New Hampshire so guess it could be a pipe. All other water is working fine except the flow into the tank. Something frozen was my first reaction but when it started to flow with the value open I wasn't sure.
 
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Old 12-29-17, 12:54 AM
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All other sinks have hot water?
 
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Old 12-29-17, 01:01 AM
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None do because the hot water tank won't is empty as water isn't flowing into the tank. If the pressure valve on top is open water goes in
 
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Old 12-29-17, 09:22 AM
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The main out of the HWH is frozen of clogged somewhere before it splits off..

Can you follow the pipe out the hot side of the HWH? Does it travel in a cold area? Are any valves off?
 
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Old 12-29-17, 10:08 AM
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Do not power up the water heater until you have water gushing from a hot faucet for a minute.

When you held the pressure-relief valve open, air in the water tank could escape to let in new cold water. If the hot water outlet pipe from the tank had not been frozen then air would have escaped that way to an open hot faucet and the tank would have refilled normally.
 
 

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