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How can I troubleshoot and fix my gas water heater?

It's all of a sudden not giving me hot water.

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  • Water Heaters Master
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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 234 Answers

SOURCE: I have a Rheem EcoSense hot water heater and all

Have you try to reset the power to the heater?Then turn the hot water facuet on to see if it will start up.

Posted on May 02, 2009

  • 14 Answers

SOURCE: my bosch gas water heater does not give out

This sometimes happens in undersized gas delivery pipes. Does the unit have at least a 3/4" supply pipe?

Posted on Jul 08, 2009

  • 1 Answer

SOURCE: noritz tankless water heater gives error code 11

This worked for me in the same situation. There is a filter inserted into main gas/ water control valve that senses water flow restriction. The sensor is connected to the gas valve. If it senses inadequate water flow it tells the gas valve to shut down so the water in the heater won't boil. Very expensive part. If you do find the filter clogged, a sediment water filter shoud be install on the inlet side of the water piping.

Posted on Oct 13, 2009

  • 1015 Answers

SOURCE: I just had a noritz tankless hot water heater

One thing that comes to mind right off is did they use proper size orifices when they converted? L.P. uses a much smaller size then natural gas because it runs at a much higher pressure. Just a thought but I had a water heater from the factory for a mobile home that had the nat. gas sticker on gas valve and I hooked it up in town to nat. gas supply. Unfortunately it had L.P. orifices and I was in a hurry to get to another job ,lit it turned burner on and left. Two hours later my customer called to say they didn't have enough hot water. Didn't take long to discover what the problem was and correct it. Thank god for good customers. Hope this helps you. Thanks

Posted on Nov 24, 2010

SOURCE: Hot water heater pilot is off. It's not gas,

You have tank-type gas water heater:
Open following link to watch thermocouple replacement.
Make sure new thermocouple sits into pilot flame. Instructions for relighting water heater are usually printed on side of tank.
http://www.youtube.com/watch?v=v0aBPsNg6vo

Gas water heaters need working thermocouple, adequate incoming fresh combustion air with no trace amounts of chemical, open vent to outside that drafts poison combustion product upward, clean burner tubes and combustion parts, correct gas pressure with no air in line, working gas control valve thermostat, no lockout condition such as tripped ECO caused by runaway heating and dirty combustion parts, and no lockout condition such as exposure to flammable vapors.
Open following links for troubleshoot resources:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf
http://waterheatertimer.org/pdf/Attic-Ventilation-and-Pilot-Outage-in-Gas%20Water-Heaters.pdf

http://waterheatertimer.org/images/Water-heater-in-attic-800.jpg
http://waterheatertimer.org/images/Test-water-heater-vent-1400.jpg

Posted on Jul 30, 2011

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Related Questions:

1 Answer

After city changed water meter the water is not consistently hot.


There are two things to check. First, check the inlet water filter on the heater. The changing of the meter may have introduced debris in the line and partially clogged the filter, causing flow issues that affect turn-on/turn-off of the unit. Also, the new meter may have changed the water pressure/flow rate into the house, If the filter is not the problem, have the inlet water pressure/flow rate checked. If it is too low, there may be some adjustment that can be made, or the city may have to replace the meter with a different unit.

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Why does the water suddenly runs COLD after many minutes of running hot?


Unless you are using a tankless hot water heater, there is a limited amount of hot water available in the tank. Electric and gas water tanks need time to recover after use, and if you are using heavily, it can exhaust the available supply. That said, there are a couple reasons why you may have less hot water than seems normal. In both electric and gas water heaters, silt can form in the bottom of the tank. This will build up over time and displace water. It also reduces the heating efficiency of gas units. There is a drain valve on the bottom of water heater tanks to allow for purging of this silt periodically, but few ever do it. You could also have, in the case of an electric hot water heater, a bad element or thermostat. Most electric heaters have an upper and lower element and thermostat. If one fails the other will still work, but the water takes longer to get hot and will deplete faster.

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Were is the water boiler located.

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The water inlet to the heater must be plugged.

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Our Hydrojet gas water heater stopped producing hot water all of a sudden. I was wondering what kind of things we can do to get it started again.


This could be caused by a defective thermocouple,gas valve, limit switch, clogged spud or anything else. More information is needed. Gas equipment should not be serviced by novices. Save your life and property. Hire a professional!

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1 Answer

Noisy water pipes when neighbours use water


Install air chamber to cushion sudden-stop of flowing water.
Water flow coming to sudden stop is called water hammer, and will bang pipes, but also loosen plumbing joints, causing leaks.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#bang
http://waterheatertimer.org/images/Flow-rates-water-hammer-600.jpg

Air chamber has to be vertical, and about 18" long, with cap on top.
By code each Hot and Cold line at each tap will have air chamber located behind the wall. So there are two air chambers at each tap.

In your case, you can probably add air chamber to your Hot and Cold lines and solve problem for both dwellings.

Water hammer is caused because water does not compress like air.
So when long column of water suddenly stops... the whole pipe-full of water comes to sudden halt... and that water could weigh 1-1/2 pounds ... and just like a hammer head moving, the weight of water bangs the pipes to dissipate energy, causing noise.

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