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  1. #31
    Platinum Member
    Join Date
    Apr 2004
    Posts
    721
    Location
    MAINE
    Tractor
    ISEKI TL3201 38h.p. 4x4

    Default Re: Any heating/ac guys out there!!!!

    one thing i'm not afraid of is elec./gas or jist bout anything else...now tornadoes ..they scare me..don't know when or where!!! gas and elec...up to 500kv..i can deal with ..jist have to b careful and treat both with respect!!! [img]/forums/images/graemlins/grin.gif[/img] [img]/forums/images/graemlins/grin.gif[/img]

    how bout yer bang. prop??

  2. #32
    Veteran Member BillyP's Avatar
    Join Date
    Dec 2002
    Posts
    1,769
    Location
    Eagletown, OK
    Tractor
    JD 4610 ehydro MFWD

    Default Re: Any heating/ac guys out there!!!!

    If it were me, I'd change the thermocouple again. You might even clean the pilot light orifice/jet also.

    I just don't see how it could be a pressure problem. It doesn't take much pressure at all to keep the pilot lit and you'd really notice a low pressure problem when the main burner came on. The control valve "usually" works right or not at all.

  3. #33
    Platinum Member
    Join Date
    Apr 2004
    Posts
    721
    Location
    MAINE
    Tractor
    ISEKI TL3201 38h.p. 4x4

    Default Re: Any heating/ac guys out there!!!!

    thanx bp!!!and t35 and everyone else 2!!!! youze guys is awesome!!!! [img]/forums/images/graemlins/grin.gif[/img] [img]/forums/images/graemlins/grin.gif[/img] [img]/forums/images/graemlins/grin.gif[/img] [img]/forums/images/graemlins/grin.gif[/img] [img]/forums/images/graemlins/grin.gif[/img] [img]/forums/images/graemlins/grin.gif[/img] [img]/forums/images/graemlins/grin.gif[/img]

    i cannot sincerely wait till i have the answers 2 one of yer pblems!!!!! make me feel much betta!!!! [img]/forums/images/graemlins/grin.gif[/img] [img]/forums/images/graemlins/grin.gif[/img] [img]/forums/images/graemlins/grin.gif[/img]

    the thermo couple is not even 1.5 wks old...dont think it is that ...jist sumfn in d middl thats messin me up???

  4. #34
    Super Member Inspector507's Avatar
    Join Date
    Mar 2002
    Posts
    5,799
    Location
    Central Ohio

    Default Re: Any heating/ac guys out there!!!!

    polecat,
    How old is the whole tank? Could it be close to time to replace the whole thing? How about the venting? Back drafting could cause the pilot to blow out.

  5. #35
    Elite Member SPIKER's Avatar
    Join Date
    Jun 2002
    Posts
    4,158
    Location
    Ohio, Jeromesville, Ashland County
    Tractor
    Jinma 284

    Default Re: Any heating/ac guys out there!!!!

    true to what inspector 57 said back draft can blow out pilet: since this is NEW TC I would still suspect it or the ground problem. I build ovens for a living and work on the systems, as stated the thermocouple is a generator uses a dc voltage between the flame and the ground, if the ground is dirty then you cant get DC... as all you have is a slight charge and no where for it to go. it stays on for a while and when the main lights the charge goes up the ground resistance changes and as soon as the main flame drops out the signal is lost for the pilot...

    the fact that it stied lit when it was cool and moist tells me the dampness helps/helped out I'm pretty set that is the rusty ground problem. and or the new replacement thermocouple is not connected very well, a simple remove and reinstall will problably help out. and if you remove it might as well clean all the mounting surfaces. the water lines should provide a good ground but that is not always the case... That little red button is on the valve. it is held in by you untill the thermocouple voltage can hold it in electromagnetically. it could be a bad valve but most of the time the valves are OK and changed due to lack of troubleshooting by the mechanics part... also if you go to a persons house and only change a 5 buck thermocouple then you give them a 100 buck bill they get grumpy... on the other hand you tell them that the valve went bad and change it they are less likely to get mad...

    Intermitant problems are a P.I.T.A. to find, most recent one is the furnace which uses a bi metalic stitch to heat instad of the thermocouple but does same function. it works 99% of time and when you go back to check it is reset when pulling the cover from the furnace! so finding it againe and can't duplicate can get to be a madning experiance. I could have changed valve and switch but chose to install a 24vac light into the circuit so that I could troubleshoot from the phone. (woman was in dire circumstances can't aford to pay for un needed parts.) light buld price was 2 bucks and few min time I didn't charge for. showed her what to look for when it happened next time she did and it aws the bi-metalic switch... I got one from e0bay for 9 bucks but she can't pay right now I'll fix t for her when I get time and won't charge her only for hte parts as I know her circumstances and what is happening in her life.

    anyhow with a hot water tank that old you are looking for problems and the tank will prbably go pretty soon too. we are lucky to get 8~10 yrs out of a tank in our neck of the woods with the heavy hard water and excess salt treatments the water systems recieve here... nothing usually goes wrong in that time and the tanks usually end up leaking someplace. even the glass ones! I got stuck with that one 25 yr warrenty and was outin about 8 yrs. anyhow jsut my thoughts of the problem...

    Mark M [img]/forums/images/graemlins/smile.gif[/img]

  6. #36

    Default Re: Any heating/ac guys out there!!!!

    Clean out the pilot tube and orfice. This should resolve your problem

  7. #37

    Join Date
    Nov 2003
    Posts
    55
    Location
    No. California

    Default Re: Any heating/ac guys out there!!!!

    Are you sure you have the right thermocoupler- they make ones with different outputs, the ground is another possibility-the nut is the ground connection, if its not clean and tight it lowers output- It's most likely the thermocouple output is weak, because when main burner is on it puts more heat to it, and when main burner goes out output drops enough for latch solinoid to let go

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