Question about Water Heaters

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I recently had to change out my water heater. WIth the new one in hookied up I frequently get diminished water output. I did not have this problem before with the old unit. It was immediately apparent with the install of the new one. The new unit is the same size and specs as the old one. What could be the problem?

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The question is unclear.
Diminished output could mean you have less less pressure on hot side and hot water barely trickles, or it could mean you have fewer gallons of hot water available.
The type of water heater is also unclear. Do you have gas or electric, or indirect or tankless or tank or power vent, or RV heater.
The label located on side of water heater is valuable source of information.
As a general rule the serial number is not important, but the type of heater and possibly model number are important. Serial numbers are used by manufacturer to identify your product, and also contain information about age of water heater.

Causes for less hot water.
Cold incoming water, thermostat set too low.
With gas heater, location can be issue if burner not getting enough air.
With gas: poor venting, or new furnace with power vent
Sediment in water lines, or clogged pipes, or clogged shut off valve could cause problems.
Defective parts can be a suspect.

Solutions: First of all, exact information must be included because nobody can see through walls without description from person who can see.
1) Re-post question with more details.
2) Add a comment to this post and I might have some answers.
3) Take advantage of fixy phone service. For a price, fixya expert speaks to you via phone to help isolate problem
4) Post a detailed question on professional water heater forum:

Posted on Jan 02, 2011


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Posted on Jan 02, 2017


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Recently installed a Noritz NRCP 112 water heater, but very frequently it keeps shutting off and on the display it says error 60, after looking at the manual there is no explanation of what error 60 is....

Shut downs with new heater might be defective PC board.
Other issues could be associated with improper installation.
Low gas pressure caused by undersized gas meter or water in the gas line, undersized gas line to unit (requires 1" gas line to within 10 feet and then 3/4"), wrong type of gas line (cannot use flexible gas line), improper vent (for example too long horizontal run or undersized vent pipe or shared vent with furnace or other gas appliance), not enough incoming fresh air supply, nearby exhaust fans or vent fans stopping proper draft on tankless, temperature set too high for cold incoming water supply (install tempering tank to help preheat water),..

Other causes can be clogged water filter located where cold water enters tankless, or clogged water line, or crossover caused by bad single-handled faucet or bad crossover valve on recirculation system, improperly sized recirculation system. These problems can mean less water flow through tankless, so burner shuts down, and unit throws error code because sensor indicates water flow is still moving but inadequate to trigger burner

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I have a whrilpool water heater model fg1f404053nov replaced the thermocouple, stays lit for a couple of days and goes out....change out the gas vavle ???

Resources for Whirlpool/Craftmaster gas water heater:

Problem might be diminished air supply or bad venting. Clean the air intake located on bottom of water heater using compressed air or feather duster. Air intake screen is series of openings as wide as razor blade and can easily clog.
Clean the combustion parts and burner. Bleed air/water out of gas line. Check gas pressure.
Check for pilot and venting issues on link above, including tight house, and other gas appliances and vent fans pulling draft down the water heater vent pipe, etc.
Also see service manuals for each type of gas control valve, and replacement steps for each type.

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Water leaking out

1) Copy following link for leaking water heater:

2) Feb 2013. Add comment and describe product and add if this is new installation or older installation that recently changed.

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My smart water pilot is on but it is not heating the water tank

GE is Rheem.
Models change frequently.
Copy following link for troubleshoot resources by type of gas control valve.

Newer water heaters require frequent air intake cleaning.
To do this with Rheem requires removal of combustion parts, and then air compressor to blow out screen.
It is probably time to have a plumber give water heater a catch-up on recommended maintained, such as checking gas pressure, bleeding gas line, checking vent draft, clean combustion parts, clean air intake, check if gas control is working correctly.

Sep 03, 2012 | General Electric GE SmartWater Household...

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Cold water runs good; hot water diminished flow then shuts off completely.

Question posted under autocirc recirculating system.
Unknown if system has been taken apart and cleaned with white vinegar, or if faucets are single-handled.
Open following links to help isolate possible problems.

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I have a six month old Reliance 40 gallon water electric heater,The thermostats keep shutting the heating rods down, leaving only cold to lukewarm water, no matter how much I adjust the thermostat readings...

1) Try changing both thermostats. Thermostats are frequently defective. Don't change 1, change both, using generic parts from hardware or home center or plumbing supply.
Be sure to put-back insulation and cover over thermostats so they are not exposed to cooler air and cause misread of tank temperature.

2) Next step would be complete 30 minute troubleshoot, that would isolate the problem and give understanding of water heater operation.

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

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Water smells like rotten eggs.

When the water heater smells bad, it is time for a new anode rod.
And then you flush the water heater with 2 bottles of hydrogen peroxide.

With water heaters that experience the problem frequently, you change your incoming cold water pipes so hydrogen peroxide can be added easily.,,20047047,00.html


1 Answer

Sounds like a squirrel inside water heater

The noise is inherent in electric hot water heaters. It is the noise that the water makes when it is being heated by electric heating elements. Mineral buildup on the elements can make it worse, so changing the elements can help...but will not totally elimenate the noise. When I install a new tank and turn it on all I have to do is listen to it to see if it is working or not...even brand new will make a is the sound of hot water... :-)


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Low water pressure is diminished after replaced 2 filters in a month. plumber tested to see if water is fully flowing.

Does this mean that you are now having the right pressure? Since the filters are changed, water should
now flow. Is it all systems go?, that is assuming that
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1 Answer

Low hot water output

do you have a question on this?

You have a water heater that has woked well in the past and now the amount of hot water is diminished?

When was the last time your cleaned the junk out of the bottom? Do it now ... connect a hose to the bottom drain and lead the hose to a drain. Run the water until it is clear + 2 or 3 minutes.

Is this gas or electric? You have plenty of gas ... all other gas appliances work fine in your home?

Electric ... you could turn off the power and check that the elements still good. check contunity first then carefully - repeat - carefully - turn the power and check the voltages. should be 220 V ac

If it put out hot water before and now does not ... the elements are good ... still no hot water, could be the thermostat.

all speculation on my part because I dont know what your question is.


Oct 05, 2009 | Water Heaters

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