Question about General Electric GE SmartWater Household Water Filtration System - GNWH38F

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Gas (LP) Valve/ Thermostat Adjustments

This uint has a Robert Shaw Valve/Thermostat. On the top there is the Shut Off / pilot push to light switch. Next to that there is an adjusting screw that looks as if it was preset because it had a red sealer or paint over it. I can tell that this adjusting screw has been tampered with. The red sealer does not match up. What does this adjust and can it be readjusted?

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That is the flow to the pilot lite and no it is not supposed to be readjusted, if anything you should get the numbers off the gas valve and replace it, or depending on the age of the water heater get a new one,

Posted on May 29, 2009

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Posted on Jan 02, 2017

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30000BTU wall heater keeps shutting off LP gas supply.Pilot stays on,when I turn up the thermostat gas comes on, after a short time, gas supply & pilot shut off with a sharp loud noise


It sounds like either the high limit or the spill switch is bad. These are snap disc thermo safety devices. Locate and jump out, one at a time. If unit works when you jump out the limit, replace it. The same goes for the spill switch.

Feb 18, 2017 | Water Heaters

1 Answer

Water heater burner wont light


Problem is not thermocouple:
Thermocouple should be finger-tight plus 1/4 turn
Overtightening will short thermocouple against gas control valve, and solenoid switch will not open, and no gas will reach pilot once red button is released.
Tip of thermocouple has to sit in the pilot flame.
If pilot flame will stay on, then thermocouple is good.

Problem is not solenoid switch.
The gas control valve solenoid opens and closes gas supply to gas control valve.
On mechanical gas control valve, when you push down the red button to light pilot, then you are opening the solenoid and letting gas flow into gas control valve.
When heat is applied to thermocouple, a small electric current travels to gas control valve, and this causes solenoid to stay open.
If you extinguish pilot, then no current travels to gas control, and solenoid clicks off.
You can hear it click, and this is how you test it.
However, since you are getting gas to pilot light, then the solenoid is not the problem.

This leaves 4 possible problems:
1) Bad gas control valve thermostat.
http://waterheatertimer.org/pdf/How-to-replace-water-heater-gas-valve.pdf
2) Inadequate gas pressure. Call gas company.
3) Dirty combustion parts. Clean the burner with wire brush and water.
4) Clogged air intake on FV water heaters: Rheem FV gas water heaters have glass vial that will break if combustion is slowed by clogged air intake.
http://waterheatertimer.org/How-to-repair-Rheem-TRD.html
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html

Oct 06, 2012 | Rheem 40 Gallon FVR NATGAS Water Heater 6...

1 Answer

We have an atwood lp gas water heater 6 gallon g6a7 white rogers control. The pilot lights but when we turn it to on it goes out, even after holding it up to a minute. It was running fine, we thought we...


If pilot stay lit, then thermocouple is working.
If pilot will light, then you have gas. If pilot goes out when pilot button is released, then thermocouple is next suspect.

Thermocouple tip must sit in pilot flame.
The pilot light heat applied to two different metals inside thermocouple causes small current.
The current travels back to gas control valve through copper line.
If the gas valve receive this current, then a magnetic switch stays open and allows gas into the gas control valve.
The magnetic switch is on the end of the red button you push down when lighting pilot. Essentially the red button is an override to the magnetic switch.
If the gas control valve does not receive the current, then the magnetic switch does not stay open when you release the red button.
When replacing thermocouple, note that it is not screwed very tight into the gas control valve. Finger tight + 1/4 turn. If it is overtightened, then the small thermocouple current shorts out against the gas control body.

Sep 01, 2012 | Water Heaters

1 Answer

Hot water heater pilot will not light


You have red wires connected to bottom of gas control valve?
Is this a power vent model?
What model, what brand water heater?
Is new thermocouple is finger-tight plus 1/4 turn and not shorted against gas control valve?
http://waterheatertimer.org/How-to-test-water-heater-thermocouple.html

Copy following link for safety magnet:
Magnet will click closed when pilot is turned off. Put butane lighter on end of thermocouple and listen for clicking sound.
http://waterheatertimer.org/pdf/Safety-magnet-Gas-control-valve.pdf

Copy following link for troubleshoot by type of gas control valve:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

Bad gas control valve:
Low gas pressure, air in gas line, inadequate air supply, clean the air intake, tripped FVIR system, etc.

Aug 28, 2012 | Water Heaters

2 Answers

Pilot light will not relight. Went through the steps but nothing happened.


There is no single sure-fire answer for pilot light:

Open following link for pilot light troubleshoot, including generic troubleshoot steps, Reliance troubleshoot handbook showing how to test parts, generic images showing how to clean burner and combustion parts:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Cleaning combustion parts may be solution, and bleed air out of gas line. Make sure gas line shut off handle is parallel with gas line, and not turned off.
Piezoelectric igniter might be bad.
Thermocouple assembly could be bad.
ECO or thermal switch tripped because of overheating event. On newer models push in the small reset button located on combustion chamber door. It is a round plastic piece with 2 wires attached and tiny push button in middle. Older model might require gas control valve thermostat replacement.
FVIR event from exposure to flammable vapor has shut down water heater.
Gas control valve thermostat is bad.

Typical Whirlpool manual has information, including pilot light troubleshoot starting page 26, and instructions for removing manifold door cover:
http://waterheatertimer.org/pdf/Whirlpool-315420-000.pdf

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Jun 06, 2011 | Whirlpool Water Heaters

1 Answer

How to change bad thermocouple on reliance gas hot waterheater reliance 606


it is important to turn off

the gas supply to the water heater at the manual gas shut-off

valve. This valve is typically located beside the water heater.

Note the position of the shut-off valve in the open/on position

then proceed to turn it off.

2. On the lower front of the water heater locate the combination

gas control valve/thermostat. Depress and hold

the lock tab located under the gas control knob on the right.

Rotate the gas control knob on the combination gas control

valve/thermostat clockwise until "OFF" aligns with the mark on

the front of the gas valve. Once the gas supply has been shutoff,

remove outer door. 3. Using a 1/4" nut driver or socket loosen the two screws securing

the manifold door assembly until they are free. Do not

totally remove the screws and plastic retainer washers from

the manifold door. The screws and retainer washers will be

needed to reattach the manifold door. 4. In this step, the thermocouple, manifold tube, pilot tube and

igniter wire will be disconnected from the combination gas

control valve/thermostat. Using a 7/16" wrench

disconnect the thermocouple (left-hand thread) and pilot tube

(right-hand thread). Using a 3/4" wrench disconnect the manifold

tube (right-hand thread). Carefully pull the igniter wire from

the igniter button.

5. Grasp the manifold tube and push down slightly to free the

manifold tube, pilot tube, and thermocouple from the combination

gas control valve/thermostat. when installation is complete and gas is back on, You should be able to relight the pilot and the functionality of your gas hot water heater should be restored.

Nov 27, 2010 | Reliance Natural Gas Water Heater Control

1 Answer

Reliance gas water heater 640ycrs pilot light will not stay after 1 heat period replaced thermal couple has gas thermal switch


if water heater will heat a tank of water before the pilot light goes out you need to replce the gas thermostat

Mar 04, 2010 | Reliance & 30 Gal LP Gas Water Heater

1 Answer

Rheem/GE power vent water heater, pilot lites, but not the main


I would check to see if the switch on the blower pressure sensor is closing...When T-stat calls for flame, the circuit starts the blower, then the blower pressure sensor switch closes to allow the main gas valve to be powered.

Jul 08, 2009 | Water Heaters

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