Question about RTO Atwood DSI-RV Water Heater-6 Gallon

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Red light on ignition switch not working

Both electric and propane are working perfectly on my new 6 gallon DSI. However the red light on the switch does not operate at all for gas or electric. I know the electric side it is not supposed to but it should light on the gas until it lights right? Is there a bulb, L.E.D or maybe something else could do that?

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  • RTO Master
  • 6,674 Answers

On gas, usually it may light momentarily when first igniting, but as long as it lights on propane, the light goes out. Only if there is a problem that cause it not to light, will it stay on.

Posted on Jul 09, 2010

  • davidrider Oct 20, 2010

    I have found that if in fact the red light no longer comes on the power is not going to the pilot to light. Remove the fusible link on the TSTAT in the pilot compartment and place the connection directly to the TSTAT relay. If the fusible link is defective the red light will come on when wired directly and the pilot will light. Please note that you cannot run the water heater this way as the sole means of protection has been circumvented. This will get you by in a pinch but the fusible link needs to be replaced.

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1 Answer

!990 Bounder By Fleetwood Water Heater is not lighting the propane


Check the gas line orifice for a spider web. Its possible the gas is not able to get past the web.

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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

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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

Dsi flt after trying to fire 3 times piezo works


Try removing the safety cut out (looks like a resistor in a plastic sleeve going to thermostat terminal) . Just disconnect it at both ends and connect the female spade from power wire directly to thermostat male terminal where the cut out was connected and try it. If it works, replace it when you get a chance. That protects system in case of flame jumping up in that area due to problems or spider webs etc. Once it's been tripped, it's no good. If that's not the problem, try cleaning your ends of your electrode, and make sure they are in front of flame when burner ignites, as it also act as a flame sensor. Let me know how you make out.

Jun 21, 2010 | RTO Atwood DSI-RV Water Heater-6 Gallon

1 Answer

The water heater on my motorhome guit working on


Obviously breakers are marked wrong, and good thing you checked. I always double check as well, seeing how I've found many mislabeled right from factory, or perhaps previous owners switched them and never changed original labeling. I need to ask though, are you sure the light is not just for the electronic ignition for the propane? Most have a red light to indicate propane side did not light when tried, and no light for hydro side. Have you also checked for another switch on side of cover at back of water heater where you see hydro cable going in to it? I guess I should ask as well, if you've owned this motorhome for a while, or is it new to you? I'm not trying to be sarcastic, but sometimes I forget to ask that and then find out they're new at this.

Jun 07, 2010 | RTO Atwood DSI-RV Water Heater-6 Gallon

1 Answer

I have a G6A-7E electronic ignite water heater.


Make sure propane is on and getting to your stove burners ok, first, then try switching it back on. If it fails to ignite, shut switch off and try a couple of times, if still no ignition, get back to me.

May 24, 2010 | RTO Atwood Water Heater - 6 Gal LP

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