Question about Water Water Heaters

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RV water heater has no flow on the hot side. To store I used air to purge the lines by connecting to drain plug port. 30 lbs inlet water pressure. 10 gallon Atwood, heater is 15 years old.

Atwood heater is electric/propane/engine heat.

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  • Water Master
  • 66,051 Answers

AT IT'S AGE IT NEEDS REPLACED . BUT WATER MUST COME OUT IF THE INLET SIDE AS NOT BEEN SHUT OFF

Posted on Mar 11, 2019

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6ya6ya

6ya staff

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Posted on Jan 02, 2017

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motor1258

Mike Butler

  • 6674 Answers

SOURCE: Atwood DSI-RV Water Heater-6 Gallon: No hot water pressure....

Check for by-pass valve(s) on back in wrong position(s).

Posted on May 20, 2010

motor1258

Mike Butler

  • 6674 Answers

SOURCE: I have an Atwood water heater G6A-7E, heater heats

First check that any by-pass valves are in proper position. Remember, cold water has to enter in bottom fitting at back of tank, and hot water comes out at top fitting. Thus any valves that may be there, need to be in open position, and any valve between those 2 lines will need to be closed. If all valves are in proper position and working as they should, I would suspect you have a faulty check valve between top (hot) line fitting and tank. One easy way to check that before replacing it, would be to shut incoming water source off, whether running off pump or hose attached outside. Then relieve all pressure in system by opening taps until all pressure is gone. Now, go outside and open pressure relief valve carefully ( in case it's hot ) and make sure pressure is relieved there as well. Now, carefully hold pressure relief valve open while you have someone turn water back on, and see if you get good flow from pressure relief valve. If you get good pressure coming out of there, that tells you your tank is getting full, and you have water coming in as needed, so problem has to be on hot side ( top fitting ) and/or onward from there, which would be check valve fitting at top next to check. Remove the check valve and If you don't have a new check valve to try it, just put a short galvanized 1/2" pipe nipple in there for now if needed and that should do it, just attach your fitting directly to nipple. Before you do this, make sure you have removed all aerators etc on taps that may be plugged and tested pressure that way as well just in case. I have seen all of them plug up at same time before. If you remove them and get good pressure, then problem solved.

Posted on Nov 12, 2011

Stephen Potts

  • 447 Answers

SOURCE: Have atwood 6 gal water heater for an rv. Heats

Sounds like selector switch is bad. I would start there first. If not the switch, heating element probably burned out.

Posted on Sep 08, 2014

Tom Chichester

  • 55370 Answers

SOURCE: Atwood 10 gallon water heater has hot water on electric but will only run hot out of faucet for a few seconds and then go cold. Help?

The heating element may be breaking down.

Posted on May 21, 2016

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1 Answer

Converting Atwood RV Gas hotwater heater with Electric ignition with a Gas/Electric


If they are on outside of tank , I'm thinking your new tank has motor-aid feature as well. That is used to circulate coolant through from engine of motorhome while driving and it keeps water heated. That feature usually adds to price of tank. Hope you didn't pay for some feature you"ll never use.

Jul 13, 2014 | RTO Atwood DSI-RV Water Heater-6 Gallon

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Need to replace G6A-6E Atwood waterheater, what replacement model can I use?


Why not the same model/size? Atwood 6 gal, works on propane with electronic ignition. Or, you can get the 6 gallon with electronic ignition, and electric element as well provided you are willing to run hydro to water heater as well, if not already there. Check any RV parts site for prices and availability. Some places are out of stock currently. I assume your current tank is leaking?

Sep 29, 2012 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

We have no hot water, and the DSI light is on. Doesn't work in either electric or gas mode.


I'll need you model number to verify it has electric element, as well as DSI ignition. Does it try to ignite,on propane, as in sparking at electrode? On DSI, the light on usually means it tried to light but failed due to a problem, such as propane not on, or present etc.
Do you have a 12 volt test light or Multimeter?

Aug 15, 2011 | RTO Atwood DSI-RV Water Heater-6 Gallon

1 Answer

I have a new Atwood 6-gal propane water heater (still under warranty). It works fine except that when warm water is flowing, the burner will start heating only after the water gets quite lukewarm. Can one...


If it's manual light, then only dial or lever on gas control is adjustable, and you can try turning it up a little at a time. It will increase water temperature so be careful, but that should also make it kick back in sooner as well. If it's electronic ignition, there is 2 or 3 heat settings available in thermostats ( little disc behind foam cover under pressure relief valve) . Obviously on those, if you choose higher temperature, it cuts back in sooner as well. If you have electric element, they have a thermostat on rear of water heater as well, behind electrical connection box. If your not 100% sure what I'm saying here, get back with model number of heater inside cover and I'll tell you your options. Please remember to be careful of scalding when you turn up the temperature.

Oct 20, 2010 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

I have a Atwood 10 gallon electric/ propane water heater on the Hornet travel trailer I purchased used. There are two switches on the wall, one is an on/off switch that lights up and the oither is just an...


The two switches control the water heater either in the gas or electric mode. The switch with the lights would be for the gas operation, and the switch without lights would be for the electric mode. Prior to operating either switch, make sure the water tank is full of water. Turn your hot water tap on, if water comes out, tank is full. Connect trailer to 110 Volt source, turn circuit breakers on, Place switch without lights to on position. If water does not heat in 45 minutes, Install new heat proble. The gas mode should be repaired by someone that is familiar with that system. Atwood can provide you with a local service center.

Oct 10, 2010 | RTO Atwood DSI-RV Water Heater-6 Gallon

1 Answer

When gas switch on an atwood water heater is turned on, the electric switch blinked and unit doesn't light


It usually only lights when starting up on propane, or if it didn't ignite for one reason or another. Usually light off indicates working o.k. Are you sure the electric element hasn't been on and water is heated already? Carefully open pressure relief valve slightly and see if water is hot or cold.

Jul 11, 2010 | RTO Atwood DSI-RV Water Heater-6 Gallon

1 Answer

Water just gets luke warm on propane or electric. has electronic ignition, do i need circuit board? Atwood 6 gal. tank


Run it on propane and let water heater go through a heating cycle, and when it shuts off, CAREFULLY , pull the lever on the pressure relief valve slightly and see how hot the water feels there. If it's hot there, then it's more than likely a problem with your by-pass valve(s) at the back of the water heater. Either in the wrong position, or faulty, and allowing hot and cold to mix. If in doubt which one it may be, you may be able to remove by-pass set-up completely, depending on what system you have. What the ultimate goal is would be to attach your incoming cold line directly to bottom fitting of water heater, and outgoing hot line, to the top. Not unusual in some systems for one of the shut-offs in between the 2 lines to stay partially open, and allow cold to mix with hot, thus -warm only. If it's not hot at pressure relief valve, then I suspect a faulty thermostat, but that would mean they both (hydro and gas) would have to be faulty which is unlikely.

Jun 17, 2010 | RTO Atwood Water Heater - 6 Gal LP

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