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  1. #1
    Join Date
    Oct 2013
    Posts
    7

    Gas Valve and Pilot light

    This concerns a Ruud/Rheem 80% furnace UGDG125, standing pilot. This furnace was installed around 1993. Recently got a call out and found the pilot out. It wouldn't re-light with a new thermocouple, so I replaced the gas valve.

    The new gas valve pilot lit easily but the pilot light was slightly smaller than the previous. (incidentally, this furnace got a retrofit issued by the factory shortly after it was installed which included a small shroud around the pilot assembly to prevent the draft of the burners from blowing out the pilot.)

    As I observed it's operation, the new pilot light would occasionally blow out. When I went to re-light it, pressing the pilot button would not always release gas to the pilot. I had to fiddle with the pilot button and the gas knob to get flow from the pilot while pressing the button, on two separate occasions. Seems like the new gas valve may be bad, do you agree?

    When I put a new,new gas valve in, if I still have a problem with the furnace blowing out the pilot, which screw can be used to adjust the pilot size? The valve is Honeywell VR8200H 1004. 1/2" fpt in and out, 24 VAC, standing pilot of course.

    thanks guys.

  2. #2
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,625
    You're going to have to become a professional member to hear the answer to that question.
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  3. #3
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,591
    With any gas appliance, there exists the possibility of making the wrong adjustment that could lead to a dangerous situation. That is the reason we do not give out instructions on adjusting heating equipment in this "OPEN" forum.

    Whether you are a homeowner or technician, I know you can understand that, as well as appreciate it.

    If you have an HVAC co-worker or boss, I would get with them to discuss this problem.

    As 2sac said, you can apply for PRO membership when your post count gets above 15. Then when you are inside the "LOCKED" Pro forums, we can openly discuss this issue.
    Instead of learning the tricks of the trade, learn the trade.

  4. #4
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,095
    Moved to Tech to Tech forum.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  5. #5
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,095
    Unfortunately, what your asking for is more then many like to discuss in the open forums, as DIYers can read these forums.

    The paper that came with the new gas valve will have instructions.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  6. #6
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,290
    Why install a major repair part in a 20+ year old furnace? Would the customer not go for a new furnace?

  7. #7
    Join Date
    Oct 2004
    Location
    Central WA
    Posts
    1,533
    Quote Originally Posted by 54regcab View Post
    Why install a major repair part in a 20+ year old furnace? Would the customer not go for a new furnace?
    Probably because it's cold out and the customer wanted the heat on. I can get a gas valve in pretty quick. After that the comfort advisor can come out, measure, calc, propose, schedule and order, wait... wait... install! He can probably find enough rebate money to cover the gas valve, too!

  8. #8
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,290
    Quote Originally Posted by cjpwalker View Post
    Probably because it's cold out and the customer wanted the heat on. I can get a gas valve in pretty quick. After that the comfort advisor can come out, measure, calc, propose, schedule and order, wait... wait... install! He can probably find enough rebate money to cover the gas valve, too!
    Not knowing where the OP lives does make it hard to suggest other solutions for temporary heat. By fixing their furnace wouldn't that make it harder to "sell them something they don't need" ?

  9. #9
    Join Date
    Oct 2004
    Location
    Central WA
    Posts
    1,533
    Quote Originally Posted by 54regcab View Post
    Not knowing where the OP lives does make it hard to suggest other solutions for temporary heat. By fixing their furnace wouldn't that make it harder to "sell them something they don't need" ?
    Do you sell things to people that they don't need? I guess that's why I'm not very good at sales. I do service, and I will often recommend a new system, but there seems to be a fine line ethically for selling techs chasing commission. I'm going to offer the repair as an option. Assuming the furnace is safe, we can get the heat on today and let the customer make an informed decision without being rushed. Maybe it's not a good time financially to do major surgery to the house. Something like that will likely push someone into serious debt.

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