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Old 07-08-2014, 08:56 PM   #1
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Help with tankless. Any ideas?

I have a new gen 2 tankless water heater. It's been working great until tonight. Now the unit fan kicks on but no flame or spark. I pulled the cover and it doesn't have any codes flashing. I have just under a half tank of propane. Anyone have any ideas I can try to fix this??


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Old 07-08-2014, 09:06 PM   #2
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Might be silly to say, but make sure the propane is turned on. I've read about spider webs causing the heaters to malfunction so maybe make sure nothing like that is blocking the flame. Good luck!


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Old 07-08-2014, 09:07 PM   #3
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Is the sail switch moving? Try to jump the flow switch they are prone to stick, it is the gold fitting in the back of the unit (inside) with 2 wires coming out
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Old 07-08-2014, 09:13 PM   #4
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I did verify the propane and the sail switch. I will go out and look at the flow switch now.


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Old 07-08-2014, 09:18 PM   #5
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What one. The one in the left of the picture with the grey top or the on on the right looks like a all brass fitting with small black switch.


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Old 07-08-2014, 09:21 PM   #6
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On the right... or center on the picture. With the black thing in the center and 2 small wires coming out. Hit it with a screwdriver as it might be stuck if that no fix jump it out of the circuit
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Old 07-08-2014, 09:23 PM   #7
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Ok I will try it. How does that switch work and how does it keep the flame off?


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Old 07-08-2014, 09:24 PM   #8
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And explain how you would jump that. I don't want to do it wrong.


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Old 07-08-2014, 09:26 PM   #9
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Their is a slug of metal inside that moves with water flow, I replaced mine 2 times as the little screen inside got some trash in it .
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Old 07-08-2014, 09:35 PM   #10
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See the ground wire??? Now look for the power wire.. just take the ground wire and a piece of another wire and touch to to power wire to complete the circuit to ground. As this turns on the burner when water is flowing, but do not leave connected and walk away... I made a push button switch with alligator clips and connected to both wires when mine went inop, when the wife needed hot water I went outside and pushed the button untill she was finished with the hot water, and I could get another switch, or if you have tools remove the switch and see if The slide inside is moving
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