Question about RTO Atwood Water Heater - 6 Gal LP

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Hot water heater flame problem

Water heater lights okay. at sea level flame does not enter flame tube but comes back past igniter etc. at higher altitudes the flame enters the flame tube and exits out the exhaust end but with so much pressure it extends 3 or 4 inches outside the end. tube is clean not blocked etc. any ideas?

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  • RTO Master
  • 17,173 Answers

What size is the orifice? Are you using LPG or CNG? What pressure is the regulator set to?

Posted on Jul 15, 2013


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

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Posted on Jan 02, 2017

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SOURCE: Atwood water heater - pilot light and flame malfunction

The thermocouple sensor may not be in the best position to sense that the pilot is lit.
Adjust the thermocouple mount or simply bend the thermocouple "wire" so that the pilot flame is touching the tip.

Posted on Oct 13, 2009

  • 6674 Answers

SOURCE: On an atwood water heater, I have a small yellow

You need to have a manometer (pressure test) done on your system. If all that is new and clean, as stated, then you either have low pressure or a faulty/improper, gas control.How's the flames look on stove burners?

Posted on Jun 21, 2010

  • 43501 Answers

SOURCE: I just replaced my gas

There are a couple of things to check....
I am assuming that the gas is LP or Propane....
make sure that the gas valve is for the right gas and not natural gas...
Also, it is possible that the regulator that cuts the pressure from the tanks is bad and that maybe why the original gas valve failed....
If you have the correct gas valve installed, get a gauge and check the pressure of the gas right before the gas should be somewhere between 8 and 12 inches water column...
If the regulator is not working properly, check that the vent hole in the regulaor is not plugged by a mud wasp nets or something like that...


Posted on Jul 16, 2010

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SOURCE: My atwood water heater has spark and will light

If you see a little short round (cut-out)diode-like piece inside a clear plastic sleeve that runs from wiring to thermostat terminal,(usually right under pressure relief valve) remove it from the thermostat terminal, as well as wiring from heater (take it right out of the circuit) and connect that wire directly to the spade connector where it was attached at thermostat, and now try it. They are a one shot cut-out, and if it went, no power gets to the system and by removing it, you will see if it's the problem or not. They are a safety device that if for some reason you get too large of a flame from water heater, and it feels the flame/heat, it blows and cuts off power. Should be replaced when you get a chance, but at least you'll know what the problem is. Let me know if that works please.

Posted on Jul 22, 2010

  • 6674 Answers

SOURCE: I have a 6 gallon

Your on right track. When this happens and small flame still there, pull wire(s) off at gas valve, or test for voltage from ECO to gas valve. No voltage, then there should be no gas. Change gas valve.

Posted on Oct 20, 2010

Testimonial: "Changed the gas valve, now heater works as it should, No fumes and no flame after shutoff."

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1 Answer

Where is the flame sensor?

it will be close to the fire ring and is a photo electric cell
it registers flame light and cuts off the fuel supply with in seconds if the flame doesn't appear

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Atwood water heater g6a8e lights but flame goes out after 5 to 10 seconds. I replaced igniter / thermocouple and it worked for a while but problem is back. So I need to replace circuit board?

Make sure you pull connector off and clean it and contacts on board. Be sure igniter is in flame good too. Does it have the thermal cut off in-line? Its the little resistor looking piece inside the plastic cover. If it does, and still running a few seconds and going out, remove it from the circuit, and connect wire end to where you removed cut out from, thus eliminating it from the circuit, and test it. If that cures it, replace that cut-out, as it is a safety device in case of flame up, it cuts gas off to prevent fire. Just leave it out long enough to test it.

Oct 19, 2013 | Atwood Mobile Products Atwood Water Heater...

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Digital signal

Bad gas control valve
air in gas line
clogged manifold tube
clogged burner ports
inadequate venting
screens prevent flammable vapor ignition.
Otherwise no danger.

Oct 06, 2013 | Reliance & LP Gas Water Heater Control

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Water heater flame problem

Check your exhaust, see if its clogged or blocked, clean the flame sensors, I that does not work, then your gas valve is starting to go bad, there is a cap on it if you take the cap off you can turn the gas flow down a little bit,

Jul 14, 2013 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

Can you convert a natural gas rc80i n waterheater to propane

Contact manufacturer.
Generally the answer is probably no, especially if you have a family, children, dog and neighbors.

Propane burns Hotter and has more pressure than natural gas.
Burner must be more robust cast iron.
Orifices must be changed to accommodate different gas.
Different gas control valve needed.
In some cases there are dip switch changes for type of gas and altitude above sea level ... the higher the elevation, the hotter gas burns.

Here is expected result from changing NG to LP.
But your good luck might lead to less volatile result

Apr 21, 2013 | Rinnai RC80i Tankless Water Heater 8.0 GPM...

1 Answer

We have a 10 year old Rheem PVW50 Power Vented water heater that works on gas. The last couple of days it has been giving out problems. It will not maintain hot water in the tank. I restarted it and...

The igniter is glowing, but no gas ignites?
So either the gas is entering combustion chamber and not lighting because igniter is positioned incorrectly -or- no gas is entering combustion chamber because air in gas line or bad gas control valve thermostat or gas line is clogged.
When you 'restart' the water heater, somehow you are getting gas to the burner and it is igniting.
I'm not sure what the flame switch is. If the ECO was cut out, the gas control valve would not send power to the igniter and there would be no gas available for 'restart.'
I would adjust location of igniter, check if gas is entering combustion chamber, clean the gas line to the burner, and bleed gas line for air, but another suspect could be the gas control valve thermostat.
Identifying numbers are usually on side of gas valve.
Open following link to help identify gas valve:

Jul 02, 2011 | Rheem Water Heaters

1 Answer

What is the little round white piece that the black and white wires from the gas control connect to ?

I believe that is the FVIR system.
See image:
I'm not sure if Rheem water heaters have customer-resettable FVIR, but industry changes fast.
Bradford White and Whirlpool have customer-resettable.
Without resettable FVIR, a flammable vapor incident requires service call by technician.

Flammable vapor ignition retardation was mandated on gas water heaters because of insurance property and casualty losses.
In event that flammable vapors enter gas water heater (result of cleaning, painting, or working with fuel or on cars, etc), the sensor stops ignition of vapor.
Without FVIR, pilot flame or burner will ignite vapors and burn down house and occupants.

Older Rheen water heater manuals show illustration with man being engulfed in flames.
Today, that is largely prevented.

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you via e-mail while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

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1 Answer

It has soot build up and doesnt get hot

the soot build up is evidence of another problem. Your fuel air ration is messed up. Is it possible you are at a higher altitude than the water heater was set for? When a water heater is installed at an altitude higher than 2,000' the manifold pressure on the gas valve has to be turned down. if that isn't done your wh will overfire and burn a rich sooty flame. You would expect to see a yellow flame rather than the ideal blue flame with yellow tips.

If this sounds like your problem then you need a proffessional to service the wh and reset the manifold pressure to the value in the owners manual for the appropriate altitude.

Jun 30, 2010 | Bosch AquaStar 2400ES-NG

1 Answer

No hot water, pilot light lights but no burner ignition

Thermo coupler may be defective. it controls the main gas valve by closing main if pilot is out. make sure thermo coupler bulb is positioned over and near tip of pilot flame, but not in the flame. Thermo couplers are inexpensive and easy to change out.

May 05, 2009 | Bosch & Tankless LP Hot Water Heater

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Installed during the summer,it turned cool unit will not light.

check power -ground- fuel- and for animals hiding our for winter(nests) squirrels?

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