No Gas Flowing to Surburban Water Heater

Discussion in 'Plumbing Systems (The Fresh, The Blue, The Grey, &' started by David Branley, Oct 21, 2019.

  1. David Branley

    David Branley Member

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    Hello,

    I have a surburban sw6p water heater in my 2007 Fleetwood Sunvalley which i have not been able to light.

    - Gas Tank Connected
    - Lines purged of air and galley stove lights with no issues

    This model has a pilot light that you must manually light. Following the process to light the pilot no propane seems to flow to the pilot or into the main burner.

    I suspect that the gas valve itself, i assume a solenoid is not working. Has anyone encountered this before and if so any times on repairing or replacing the valve? Anything else i should check?

    I found a replacement valve online here but at over $150 its pretty pricey. I'm wondering if i would be better to look at an updated replacement unit with DSI?

    Any advice appreciated,
    David
     
  2. NMroamer

    NMroamer Well-Known Member

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    There is a thermocouple that the pilot light heats to open the gas valve. Check that first,they usually go bad.
     
  3. David Branley

    David Branley Member

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    The challenge is that there is not even gas getting to the Pilot so i cant even light that.
     
  4. Sjm9911

    Sjm9911 Well-Known Member

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    Is air coming out of it at all? If you hold a lighter there does the flame blow?
     
  5. David Branley

    David Branley Member

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    No, dosent seem to be anything moving at all from what i can tell.
     
  6. Sjm9911

    Sjm9911 Well-Known Member

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    Next is to disconnect the regulator and see if there is propane flow behind it. If there is its the peice you linked, if not bad propane line.
     
  7. Sjm9911

    Sjm9911 Well-Known Member

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    Or something in the feed line.
     
  8. joet

    joet Well-Known Member

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    It takes forever for the gas to get to the pilot, since there is such a small flow.
     
  9. Sjm9911

    Sjm9911 Well-Known Member

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    It definitely does, but there should be air blowing the flame.
     
  10. crackerJack

    crackerJack Well-Known Member

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    X2, I would check for gas flow to the heater before I swap the gas valve.
    -Close gas tank, disconnect the gas line to the water heater, open tank briefly.
     
  11. nineoaks2004

    nineoaks2004 Every meal is a picnic and every Day is a holiday

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    Try closing the tank valve, then slowly open the valve, if opened to fast the safety in the tank will not let full gas flow thru as it detects a leak somewhere..
     
  12. David Branley

    David Branley Member

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    The Gas is flowing to the galley stove so no issue with tank or regulator.
     
  13. David Branley

    David Branley Member

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    That is a good idea, I will try that tomorrow. If I have gas there then I can be 100% certain it’s with the gas valve unit on the water heater.
     
  14. Bowman3d

    Bowman3d Well-Known Member

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    Spiders like to crawl into the orifice and clog them had that happen with my refrigerator.
     
  15. joet

    joet Well-Known Member

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    It can take up to 5 minutes for this model. The pilot has such a small flow (flame) it would be hard to tell if it was blowing air. There is no way a spider could get in to plug the orifice
     
  16. Dan Wilson

    Dan Wilson Active Member

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    I would replace the thermocouple before doing anything else. Doesn't cost much and is the most common cause of failure.
     
  17. crackerJack

    crackerJack Well-Known Member

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    Thermocouple failure would not prevent the flame from igniting initially.
    It would ignite, then go out.
    (not stay lit)
     
  18. Dan Wilson

    Dan Wilson Active Member

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    True, but a thermocouple is essentially a switch, designed to turn off the gas flow if no heat is detected, however, a failed thermocouple could fail, leaving the switch in a permanent off state.
     
  19. crackerJack

    crackerJack Well-Known Member

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    I have serviced many water heaters. I disagree.
     

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