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Old 09-27-2022, 09:15 PM   #1
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Join Date: Sep 2022
Posts: 2
SW6DE Inconsistent Lighting

I have a new TT that has been used for a few weeks where I’m experiencing water heater issues when operating on propane. I’ve watched many YouTube videos and read many posts but can’t resolve my issue.

The DSI light regularly comes on, and I can usually get it to light after resetting a few times after it goes through the 3 attempt/lockout cycle. Once lit, sometimes it is good all day, lighting several times through the day before the DSI light comes back on. Today, I couldn’t get it to light after 5 reset attempts. If I try tomorrow, it may work, it seems random.

When it is going through the 3 attempts, I hear the “thud” which I believe is the gas valve opening, and clicking from the igniter. Sometimes it “almost” lights, and I hear a pop/backfire sound, before it ultimately fails to light. When it does light, I can definitely hear the flame/burning in the tube… it never lights then goes out after a few seconds. When it lights, it’s fine…getting it to light reliably is the issue. It seems to me like a propane issue, and I’ve tried the lighting the stove trick…the stove works fine. I’ve switched tanks. What’s odd is that after a day of successful use, the issue pops up again, so it doesn’t seem like an air in the line situation. I’m stumped, any ideas?
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Old 09-27-2022, 11:04 PM   #2
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Join Date: Aug 2015
Location: South Western PA
Posts: 16,700
Have you checked/cleaned the burner tube?

Insects, especially spiders love to spin webs in them and often create issues just as you describe.

There's a cleaning brush available just for this purpose.
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Old 09-28-2022, 06:44 AM   #3
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Location: Upstate NY
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Mine does the same things. I've cleaned it and it still does those exact things, but it is random.
I've found that if I open the door (let it hang down) it lights first time, every time.
Only thing I can think of is wind direction? It's been like this for years.
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Old 09-28-2022, 07:21 AM   #4
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Join Date: Sep 2022
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Thanks for the tips, I’ll try them out!
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