Question about Rheem 81VP6S/430126 Water Heater

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A humming sound is coming from my gas water heater.

We currently have another family staying with us who are using alot more hot water. They all took showers tonight and now I am hearing a humming sound from the water heater. It is a large water heater. The sounds goes away for a bit when I turn on the water but then it begins again. I am hearing some popping and crackling also that would indicate a sediment build up. Because the water heater is more active with all this use, I am wondering if it is just time to replace this thing. The water heater was here when we moved into the house over 3 years ago and we do have fairly hard water.

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It is probable a lime build up in the bottom of the water heater tank. You can remove the bottom heating element and clean the lime out, keep in mind this sometimes turns into quite a job though. And you may damage the heating element during removal and have to purchase a new element.

Posted on Jun 23, 2009

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1 Answer

Not fireing up


Mark, It sounds like the gas valve may be bad. You may want a tech to diagnose and repair.There are other things to check also air intake and exhaust must not be plugged and the exhaust fan must be operational if equipped.
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Apr 24, 2016 | Water Water Heaters

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"Infinity 20" probably 8yrs old now. Recently started making a humming noise whilst in use. The noise continues 15secs or so after hot water tap has been turned off.


Sounds like the diaphram in the gas control valve which is not replacable. You would have to replace the gas control valve and I would also suggest replacing the thermocouple. However since the heater is 8 years old you may think about replacing the entire hot water heater. Depending on how much water has gone through it in these past 8 years it will probably rust out soon and then you will be dealing with a flood.

Good luck,

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Squeeling sound and lower pressure from gas water heater


Probably the factory-installed heat trap nipples are clogged.
Open following links.
http://waterheatertimer.org/Low-hot-water-pressure.html
http://waterheatertimer.org/Low-hot-water-pressure.html#trap
Noisy whistling and humming and low pressure are common problem with heat trap nipples and inserts from factory.
Replace heat-trap nipples with pex-lined nipples, or remove heat trap inserts with screwdriver or needle nose... careful not to break insert so it falls into tank ... which can then get lodged in hot water line elbow or under-sink shut off.
Factory-installed heat traps are part of overall strategy so manufactures can claim more efficient water heaters, without requiring customers to any thinking.
Other strategies include foam insulation instead of fiberglass (so that wires cannot be replaced on electric units), reducing factory-set temperature from previous 130-135 to 100-120, and re-estimating downward the hot water use for average family.
So some of the strategies are useful, while others problematic or imaginary.
Call manufacturer to pay-for or provide new pex-line nipples. Warranty for fist year covers Labor and parts, and after 1st year, warranty covers parts
http://waterheatertimer.org/Water-heater-manufacturers.html
Save $10 a month in future replacement costs: maintain water heater so it lasts longer:
http://waterheatertimer.org/How-to-maintain-water-heater.html

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1 Answer

Problem keeping my Rheem hot water heater light


What brand, model, and approximately how old is water heater?
This is important because water heater designs are changing quickly.
Did you remove door over combustion chamber to access thermocouple?
Newer Rheem water heaters have air intake under combustion chamber that has to be blown out using compressed air.
If this is different brand, then use mirror under water heater to see air intake.
Set water heater on bricks to avoid high water. Make sure drain line out of drip pan is 3/4" and terminates in good drainage location.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html

Put brass garden hose cap over drain valve.
http://waterheatertimer.org/How-to-replace-water-heater-drain-valve.html

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1 Answer

After hot water demand, burner stays lit, blew up Pex supply line


Thermocouple has 2 ends. One end attaches to gas control valve, other end sits inside the pilot flame.
Flame heats thermocouple, causing tiny electrical current that is detected inside the gas control valve and keeps the gas valve open so water heater can turn on when thermostat calls for heating.
If pilot goes out, then no electric current reaches gas control, and all gas to burner and pilot is shut off.

If pex line burst, that implies very high pressure, caused by closed system with check valve that stops expansion, or possible clog in the water line, or high local water pressure, or clogged factory-installed heat traps.
Put pressure gauge like BTG100 on the drain valve to check pressure, should not exceed 80psi, install pressure reducing valve on cold water line, install expansion tank on cold water line. Remove heat traps and install ordinary pex-lined di-electric nipples from hardware store.

If the water was super hot, then overheating could have caused the pipe explosion.
However the gas control thermostat is ECO protected, and if ECO (energy cut off) trips because of high heat detected inside the tank or combustion chamber, the gas control will trip off and no longer work, gas control needs to be replaced. Some newer electronic gas controls can be reset, but that type heater uses a thermopile instead of thermocouple.
Thermopile is basically a group of thermocouples, that product more electric current that is used to power electronics inside the gas control valve, which issues an error code on the gas control, and some day will send a text message each time out-of-range event occurs.

Copy following links for troubleshoot resources, including troubleshoot by type of gas control valve:
http://weaterheatertimer.org/How-to-troubleshoot-gas-water-heater.html
http://waterheatertimer.org/Low-hot-water-pressure.html
http://waterheatertimer.org/pdf/How-to-replace-water-heater-gas-valve.pdf

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Lowe's hot water heater pilot light will not stay


Hi,

If it is one of the new ones with the fancy gas control and the blinking light... does the light blink?? or not??
If it is blinking then the pilot should stay lit...
If it will not blink then the sensor is bad or not in the right place...

Or... the gas control is bad... this is happening alot...

If it is brand new... take it back...

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1 Answer

Reliance 606 natural gas water heater - model #640YORT - water does not stay hot. pilot has to be clicked to heat and then u can use hot water til tank empty and it will not continue to heat water.


If I understand correctly, the pilot light is not staying lit.
You light the pilot and water in the tank reaches temperature.
Once hot water is gone, then pilot light has to be lit again.

Gas pressure is good, and gas is flowing.
Thermostat is working at high end because it cuts off heating.
Vent is working because tank heats up.
Air intake is working.

Gas control thermostat might not be reading low temperature. Replace gas control valve.
Pilot tube might be dirty. Clean burner parts and combustion chamber, and air intake, and vent.
Backdraft might be blowing out pilot. Check for constant updraft by running water heater 5 minutes, and then light match under vent hood and see if smoke goes up.
Very hot air can put out pilot, especially when water heater located in attic. Add ventilation.
Improper vent might have water dripping back down into combustion chamber and putting out pilot light and rusting out the parts. Inspect for rusted parts and water.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf

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if your on a private well, it sounds as though your loosing enough water pressure to shut the heater off,.(which is right before the water pump comes on),....tankless heaters turn on by sensing water flow, and of course off when flo stops,......water pressure tanks often need to be re-charged with air for pressure to stay even,....does your water pressure fluctuate?

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