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Hot water heater is natural gas type gas is staying on all the time burning even when water is hot it continues to burn. Not hot water tank is over 10 years old should I try to repair or just replace???

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The thermostat is what is out of calibration...this is built into the gas valve. Unfortunately the part cost almost what a new tank does. My opinion is to replace.....today gas valve....another 8 years the tank...

Posted on May 11, 2010

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Posted on Jan 02, 2017

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Rheem 300170 HWS service manual


1) Rheem does not post service manuals.
Call Rheem and ask why, since the other big manufacturers, AO Smith and Bradford White do post service manuals.

2) You need new propane gas control valve, and matching combustion parts to fit existing tank.
http://waterheatertimer.org/pdf/Rheem-Water-Heater-parts-catalog.pdf
http://waterheatertimer.org/images/IMG_1826-LP-burner-450.jpg

3) Rheem does not recommend changing gas type, especially from natural gas to LPG.
LPG is higher pressure, and burns much hotter and requires cast iron burner, unlike the lighter-weight metal used for Natural gas burner.
The manifold tube and thermocouple must match the gas control valve, and gas-type and have correct thread for propane.
The combustion chamber and heat transfer surface can also be heavier metal for propane heaters.

Feb 08, 2013 | Water Heaters

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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

Aug 09, 2011 | Reliance Natural Gas Water Heater Control

1 Answer

Red light is flashing on my hot water tank, not producing hot water just today


You have tank-type water heater, but type of water heater and control is not known.
For possible help, add a comment and say if you has gas or electric water heater and describe what type of gas valve or control box is giving the error code.
Open following link to identify some basic types of controls:
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html

Jul 08, 2011 | Reliance Natural Gas Water Heater Control

1 Answer

Bosch 1600H-NG Natural Gas AquaStar AquaStar Natural Gas Tankless Water Heater. Problems with constant hot water. The heater turns ok but (i think) when i turn on the cold side the heater stops. at...


Possible flow sensor issue. Check to see if your water pressure fluctuates a lot or is fairly steady. These units are sensitive to the pressure. take care.

Feb 19, 2011 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm: hi i have a rheem tankless water heater, with flas...


Sounds like you may have the wrong type gas going to this? Is this an LP gas or natural gas unit? will say on label. Natural gas units run only on natural gas ditto for LP. Could be issue with manifold pressure settings. Could be obstruction in exchanger or vent. Have a authorized technician check over

May 17, 2010 | Rheem Tankless Hot Water Heater...

1 Answer

Why would the hot surface igniter burn out in two months?


It is very frail if you bump the heater hard while it is hot or cold you can crack it. If you have any water leak inside the heater or a condensation problem that drips water on it while it is hot this will break it every time.

May 07, 2010 | Teledyne Laars Laars Lite 2 Pool Heater...

2 Answers

The hot water will not come on intermitently. I


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?

Jan 10, 2010 | Rheem EcoSense by 7.4 GPM Tankless Water...

2 Answers

Natural gas hot water heater not stying lit


Probably a bad solenoid in the gas valve. Higher voltage of a new thermocouple keeps it open longer but it still fails over a period of time. Look into a new gas valve for the water heater.

Dec 17, 2009 | General Electric GE SmartWater Household...

2 Answers

Water will not stay hot


The cold main water pressure is too low to maintain a constant flow. Make sure you have no other appliences on, or your not comprimised by the lowering of pressure

Jul 23, 2009 | Bosch AquaStar 125FXKIT-NG 125FX Natural...

1 Answer

No hot water


Aquastar 1600H NG Natural Gas Tankless Water Heater Bosch AquaStar Model 1600H NG Natural Gas Whole house tankless gas water heater, 117,000 Btu input, natural draft with hydro-generated ignition. Provides endless hot water for one major application at a time . Can replace 40-gallon storage tank water heater. Optional Accessory: Model AQ1- Power vent with built-in... More freeze protection when venting horizontally. Capacity: 1 to 2 Bathrooms Dimensions: 8.75D x 18.25 W x 29.75H Weight: 40 Max GPM @ 45F Rise: 4.2 Energy Factor: NG .80 LP .84 Minimum Input: 28,000 Maximum Input: 117,000 Vent Size: 5 Gas Connection: 3/4 Water Connections: 1/2 Warranty: 12-year warranty on heat exchanger, 2-year on parts Features: Endless hot water Can save up to 50% off utility costs annually Perfect for one major application at a time No standing pilot, hydro generated

Mar 01, 2009 | Bosch 1600H-NG Natural Gas AquaStar...

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