Question about RTO W4 A.O Smith Gas Hot Water Heater Draft Inducer

1 Answer

Pilot will light, goes out when button let go,

Pilot will light, goes out when pilot button let go, replaced the pilot / thermocouple assy, same issue, also cleaned the flame aresstor, same issue ?
This is a GCV-50-101 propane unit.
I started going out for two weeks, but was able to restart, until it wouldn't stay lit all together.
My propane tank has 500 gallions with 80 PSI showing - i also ohmed out the gas valve checking for no open in the 2 leads.

OK- want to advise while I was posting this I removed my thermo, reinstalled, no help then noticed the RED GAS KNOB had a slight crack in it allowing it depressed enough to start the pilot but not far enough to enguage the thermo. removed the knob used small plyers to push down shaft-hold-let up and BAM works fine knobless.

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Mentor:

    An expert who has written 3 tips or uploaded 2 video tips.

    Governor:

    An expert whose answer got voted for 20 times.

  • Contributor
  • 50 Answers

A long time ago, in a place far away, I saw an old gas valve, might have been on a water heater, might have been off an A/C unit. I took my 10" adjustable wrench and unscrewed the coil that the thermocouple screws into. Now, when I have the problem that you describe I take the threaded end of the suspected thermocouple and put it into my spare. I light the pilot and hold the button down. Then, after a minute or two, I press the button on my spare, which now has the thermocouple attached. If the spare stays in the "ON" condition, I have just proven my gas valve to have faulted.

I suspect you main gas valve has failed, if you can find another valve, you can test as above, before buying a replacement valve.

Posted on Jul 20, 2010

Testimonial: "it was related to the gas valve but the actual control knob itself- thanks"

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Sep 01, 2012 | Water Heaters

1 Answer

Pilot light would not light but i could hear and smell gas coming out of pilot valve so i took off cover and cleaned it. It still would not light with the ignitor button so I did it manually and there is a...


sounds like the thermocouple:
The thermocouple is a safety device that turns off the gas if there is no pilot light. If you look closely at the burning pilot light, there is a small metal tube that sits directly in the flame, with wires that lead back to the gas valve. The thermocouple generates a small amount of electrical current when heated by the flame. This current keeps the gas safety valve open. If the pilot light gets blown out, the current stops and the gas valve closes. When you light the pilot light, you hold down the over-ride button for about 30 seconds. This allows the gas to flow long enough to heat up the thermocouple and generate current and then you can release the over-ride button and gas will continue to flow. If the thermocouple is defective, then as soon as you release the over-ride button, since there is no electrical current, the gas will stop flowing and the pilot light will go out.

This is a pretty common failure on water heaters and furnaces. Replacement of the thermocouple is fairly simple if you are the handyman type. If not, the thermocouple is a cheap part -- about $10 bucks, but the service call may run you $100 or so. Before you call a serviceman, get all of the brand and model information from the information plate on the heater so he can bring the proper replacement part. And sorry for your trouble. hope this helps:)

Jul 28, 2011 | Bosch AquaStar Indoor Natural Gas Tankless...

1 Answer

I CAN LIGHT THE GAS WATER HEATER WITH THE RESET BUTTON BUT AS SOON AS I LET IT GO, THE PILOT LIGHT GOES BACK OUT.


The thermocouple is a safety device that turns off the gas if there is no pilot light. If you look closely at the burning pilot light, there is a small metal tube that sits directly in the flame, with wires that lead back to the gas valve. The thermocouple generates a small amount of electrical current when heated by the flame. This current keeps the gas safety valve open. If the pilot light gets blown out, the current stops and the gas valve closes. When you light the pilot light, you hold down the over-ride button for about 30 seconds. This allows the gas to flow long enough to heat up the thermocouple and generate current and then you can release the over-ride button and gas will continue to flow. If the thermocouple is defective, then as soon as you release the over-ride button, since there is no electrical current, the gas will stop flowing and the pilot light will go out.

This is a pretty common failure on water heaters and furnaces. Replacement of the thermocouple is fairly simple if you are the handyman type. If not, the thermocouple is a cheap part -- about $10 bucks, but the service call may run you $100 or so. Before you call a serviceman, get all of the brand and model information from the information plate on the heater so he can bring the proper replacement part. And sorry for your trouble. hope it's summer time where you are:)

Jul 26, 2011 | Water Heaters

1 Answer

Will not stay on geep going out


Will pilot lit then burner and after it does this with just pilot on is that when it goes out. If this is what is happening ,pilot going out,then I would first change thermocouple. The thermocouple is usually on the bottom left hand side of gas valve.It will look like copper wire about as thick as a pencil lead. Remove burner cover and trace thermocouple line to where it mounts on pilot light assy.Thermocouple should be held in place by friction.Remove thermocouple from gas valve by lossenjng retaing nut,reach in burner compartment and grasp thermocouple at base.using small amount of force pull thermocouple from pilot assy and remove.You can get anew one at most hardware stores. Try to get one close to the length you have. A little longer ok. shorter no.Reinstall being careful when you tighten thermocouple nut as it is made of brass and valve body is made of aluminum.Very easy to cross thread or overtighten and strip threads. Make sure thermocouple is properly plased by pilot. Light piloy and hopefully this will tke care of it for you. THANKS

Nov 14, 2010 | Reliance Natural Gas Water Heater Control

1 Answer

I cant get the pilot lit...I turn it to pilot...hold down the button and light the pilot..but when I let it go to turn it to "on" the flame goes out.


Are you holding the button down for a minute or so after you light the pilot before releasing the button?

If so, almost certainly, your thermocouple is bad. This is the long tube which runs from the control box to the pilot flame. Remove this tube, take it to the hardware store and get an exact replacement.

Once the thermocouple is replaced, your pilot light should stay on.

Apr 04, 2010 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

Water heater pilot


This is more than likely the thermocoupler. The thermo Coupler is a solid cylinder shape with a point on one end and a thick aluminum wire on the other the tip is situated so that it is in the pilot flame. When it reaches a certain temperature from the pilot it sends a signal for the gas valve to stay open and keep the pilot light. If it does not send the signal the valve closes and shuts the gas off for safety. Solution first make sure you hold button long enough to heat Thermocoupler (about 30 sec) if pilot still goes out then replace Thermocoupler. Can purchase at most hardware stores and all plumbing shops.
If this has been helpful please select a rating. Good Luck and have a Grt Weekend.

Apr 01, 2010 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

The pilot light on my gas water heater continually goes out. I can re-light the pilot and get it going. The gas burners goes on runs for awhile. I'm assuming when that when the temp hits the desired temp...


getimage_new.asp?id=599586&imagetype=2&noimagetype=2&colorimagesize=2



The pilot assembly should look similar to the pic above. Depending on where you live, you may be required to hire a certified plumber to replace the parts. If not you can do it your self. Keep in mind if it's not staying lit you also need to check the thermostat and the thermocoupler before replacing the pilot assembly. There is a good chance it is just the thermocoupler going out. It is one of the first things to check when troubleshooting a pilot light problem with a gas water heater. A thermocouple determines if the pilot light is lit. If it's not lit, the gas valve fails. If that's the problem, replace the thermocouple.


  1. Shut off the gas valve on the water heater and the gas valve on the line near the heater. Remove outer and inner doors, and loosen the pilot and supply tubes and the thermocouple connections to remove the burner assembly.
  2. Step 2 Loosen the screw holding the thermocouple to the bracket. Remove old thermocouple. Bring it with you to the store to ensure you are buying the proper replacement.
  3. Step 3 Install the new thermocouple. Position the thermocouple so that the pilot flame heats 1/2 inch of the tip.
  4. Step 4 Reinstall burner assembly in the water heater. Tighten burner supply tube, pilot tube and thermocouple connections. Tighten thermocouple no more than a quarter turn more than hand-tight.
  5. Step 5 Turn on both gas valves. Check supply tube and pilot tube for leaks with soapy water. If soap bubbles, tighten connections to fix leak. Ignite the pilot light, and make sure the thermocouple tip is heating up. Replace inner and outer doors.

Jul 09, 2009 | Northern Tool Water Heaters

2 Answers

My pilot light will light, but will not stay lit? I have a gas whirpool water heater aprox 1 1/2 years old.Thisis the first time we have encountered any problems with our appliance.


Once the flame has struck it heats up a thermocouple that in turn holds the gas valve open

It is a safety measure in case the flame blows out and the gas keeps on coming.

Sometimes the end of the thermocouple gets dirty and a scrub with a fine emery board does the trick

If not it is a new part (They are not that expensive)

Jul 07, 2009 | Whirlpool Water Heaters

1 Answer

Pilot light will not stay light


Check to see if the thermocouple tip is in line with the pilots flame, if its not heating the tip then carefully adjust as necessary. If the tip is in the flame and still wont stay lit then the thermocouple is due for a replacement.This task may require that the burner assy. be removed, so as to access the fasteners that attach thermocouple tip, hence disconnecting the gas line that leads to the burner, and must be properly reinstalled and leak tested. This item can be found at most hardware stores and home centers (Home depot/Lowes) be sure to gently remove the old one and take it with you (for comparison) when you are ready to purchase the new part.
Note: As with any repair of this nature, safety must come first, quality gloves and eye protection should be warn. also do not attempt any repair that is outside of your ability and knowledge.

Good luck...

Feb 22, 2009 | Rheem 50 Gallon FVR NATGAS Water Heater...

2 Answers

Pilot light won't stay alight, when i release the knob after lighting, the flame goes out.


hello!! if you changed the thermocouple & the pilot still goes out !! could be a thermostat ( the electromagnet pilot safety ) goes bad !! make sure pilot is clean & should be sharp BLUE pilot !! not yellow & soft !! also hold down the button light the pilot use a digital volt meter set on dc milivolts a brand new thermocouple should test @ 30 milivolts+ - ! & if you have new style water htr with sealed combustion the thermocouple has a safety part of it ! change the thermocouple & make sure your vents for combustion air around the bottom of the water htr has lint & dust built up !!! kiddbrother i work for a gas company doing service !!

Dec 14, 2008 | Rheem 36" Water Heater Thermocouple Kit

Not finding what you are looking for?
RTO W4 A.O Smith Gas Hot Water Heater Draft Inducer Logo

466 people viewed this question

Ask a Question

Usually answered in minutes!

Top RTO Water Heaters Experts

Brad Brown

Level 3 Expert

17436 Answers

Jim Goldsmith
Jim Goldsmith

Level 3 Expert

2005 Answers

Mike

Level 3 Expert

4354 Answers

Are you a RTO Water Heater Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...