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Furnace issue

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STEVE_138
STEVE_138 Member Posts: 1
in THE MAIN WALL
MY FURNACE KEEPS LOSING PRIME , I OPEN PETCOCK ,LOTS OF AIR. IT RUNS A FULL CYCLE BEFORE IT TRYIES TO IGNIGHT

Comments

  • CJ_4
    CJ_4 Member Posts: 5
    Furnace problem

    I have a natural gas forced air furnace

    the igniter lights the pilot light
    after a few seconds the igniter lights
    the pilot light again(the pilot light is already lit)
    after a few seconds the furnace shuts off the pilot light

    if I wait a minute or two and try the system again...
    the igniter lights the pilot light
    seconds later the main burner comes on
    after seconds the main burner and pilot light shut off

    it is a 50/50 scenerio between each of the above situations
    the exhaust fan stays running the whole time
    I tested the pressure sensor...it works
    I tested the limit switches...they work
    I cleaned the flame sensor...Is there a test to check the flame sensor without replacing it unneccessarily
    circulation fan does work..I tested each speed
    this is an International Comfort Products furnace
    any info would be greatly appreciated


  • Charles G.
    Charles G. Member Posts: 113
    Furnace

    Give me a model no. and serial no. and I can tell you exactly what the problem is. Also, let me know what the "smart" valve looks like--slide switch or rotary switch on top. Location?
  • CJ_4
    CJ_4 Member Posts: 5


    Model# NTC6075FBA2

    The unit is 5.5 years old

    Thankyou for any solutions you may have.

    CJ
  • CJ_4
    CJ_4 Member Posts: 5


    the "smart valve" has a slide switch on top

    part#s on smart valve are HQ1011421HW / SV9501M2056

    both #'s were found on the valve ****'y

    furnace has an igniter(2wire)(filament)
    and flame sensor(single wire)

    sorry for the incomplete info on last thread


    CJ

  • Mitch_4
    Mitch_4 Member Posts: 955
    that valve

    is anything but smart. Notorious problem with the board having poor connections to that pin.

    simple test: during trial for ignition, push the plug towards to outside of the valve. If it lights then wiggle it. it will likely drop out. conclusion: broken solder joints / wafer board. replace valve I believe te replacement is the SV9520M.

    mitch
  • Charles G.
    Charles G. Member Posts: 113
    Furnace

    Well, that's not what I wanted to hear. The older gas valve w/rotary knob was notorious for this. Wiggle the flat molex plug and it would perform EXACTLY as you describe. Could be in the valve. New p/n 1170429.
    Ignitor p/n is 1009524. Cheap approach is ignitor first, then gas valve. If the ignitor is still good, you'll have a spare, just in case.
    FYI--ICP warranty is six (6) years on parts. Get me s/n and maybe...
  • CJ_4
    CJ_4 Member Posts: 5


    Serial# L010864670

    Sorry. I think I sent my last reply directly to
    an e-mail address.

    I received an e-mail from ICP
    They informed me the warranty was only (5) years on parts
    Should I verify this?

    Thanks, CJ
  • Charles G.
    Charles G. Member Posts: 113


    > Serial# L010864670

    >

    > Sorry. I think I sent my

    > last reply directly to an e-mail address.

    >

    > I

    > received an e-mail from ICP They informed me the

    > warranty was only (5) years on parts Should I

    > verify this?

    >

    > Thanks, CJ



  • Charles G.
    Charles G. Member Posts: 113
    Furnace

    My mistake. Five years is correct. Let me verify s/n.
  • Empire_2
    Empire_2 Member Posts: 2,340
    CG is onto something...

    The old Smart valves, which were very stupid,...:-) had a connection problem with the molex plug assembly. First the pilot orifice must be cleaned so that there is no problem with how well the pilot is lit. This furnace MUST BE GROUNDED. It does sound like the GV though.

    Mike T.
  • hvac-tech
    hvac-tech Member Posts: 36
    not smart vavle

    I call them DUMB VAVLES!
  • CJ_4
    CJ_4 Member Posts: 5
    problem solved

    You guys were right...
    I replaced the gas valve ****'y

    PROBLEM SOLVED!
    Thanks for everything guys.
  • Empire_2
    Empire_2 Member Posts: 2,340
    :-)

    We try to help where ever possible:-)

    Mike T.
  • Jeff Lawrence_25
    Jeff Lawrence_25 Member Posts: 746
    Good!

    Buy a brick for the Wall. Or two....

    http://www.heatinghelp.com/shopcart/product.cfm?category=13-112
  • S Ebels
    S Ebels Member Posts: 2,322
    Steve

    Try posting this as it's own topic rather than tagging it on an unrelated thread.

    Off the cuff, I'd say any one of us here is going to need more info than what you have provided regarding your problem. Make and model of furnace and burner, single fuel line or dual, age, date of last professional tune up, above ground or underground tank, gravity fed pump or suction, etc etc. would all be helpful.
This discussion has been closed.

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