Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 9 of 9

Thread: H200 Not lighting

  1. Back To Top    #1

    H200 Not lighting

    I just bought a used pool heater. I have the plumbing and gas now running. The pilot light is lit. When turn the power switch to on, the main burners will not fire. I read in the troubleshooting, to jumpthe "th" terminals. Now, does this mean to just touch a wire to both terminals? There is a wire leading off one terminal and running somewhere currently. Any help would be appeciated.

  2. Back To Top    #2

    Re: H200 Not lighting

    Anybody? lol

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,334

    Re: H200 Not lighting

    Jumping the TH terminals means to connect a wire from one to the other. It's just a trouble shooting procedure.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  4. Back To Top    #4

    Re: H200 Not lighting

    OK.....I removed the wires from the pressure switch and jumped the 2 wires. The burners fired right up. I assume I need a new switch?

  5. Back To Top    #5
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,334

    Re: H200 Not lighting

    Sounds like it.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  6. Back To Top    #6

    In the Industry
    Qwaxalot's Avatar
    Join Date
    Jun 2012
    Posts
    439

    Re: H200 Not lighting

    Quote Originally Posted by kodeblue
    OK.....I removed the wires from the pressure switch and jumped the 2 wires. The burners fired right up. I assume I need a new switch?
    Before you replace it, make sure that the filter is clean, the pump basket not clogged, and that water is circulating properly.
    In the industry, CSP (Certified Service Professional) by the NSPI and it's successor the APSP. My company services over 600 pools every year. I think the practices regularly espoused on this forum (especially the BBB method) are outstanding; however my comments will be often oriented towards the goal of getting it done, and getting it done right now!

  7. Back To Top    #7

    TFP Guide

    Join Date
    Jun 2012
    Location
    western NY
    Posts
    1,557

    Re: H200 Not lighting

    Quote Originally Posted by kodeblue
    OK.....I removed the wires from the pressure switch and jumped the 2 wires. The burners fired right up. I assume I need a new switch?
    Maybe, maybe not. You need to do one or the other test not both at the same time. Jumping the terminals just bypasses all of the safety switches and thermostat. Jumping the pressure switch just bypasses the switch. Try getting the unit to fir with just the pressure switch bypassed and everything else as normal. If it fires, then there is something amiss in that item. Could be a flow issue or it could be a bad switch. If it does not fire when jumped then you need to test another safety switch in the circuit. somewhere there is a bad switch or sensor. If the unit fires with the th terminals jumped it only realy proves the power to the gas valve is sufficient to operate it. I have included a simple schematic that shows how these systems work.

    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

  8. Back To Top    #8

    Re: H200 Not lighting

    OK I thought what I did was bypassing the switch. How do I bypass it if I am doing it wrong?

  9. Back To Top    #9

    TFP Guide

    Join Date
    Jun 2012
    Location
    western NY
    Posts
    1,557

    Re: H200 Not lighting

    My bad, I misread your message to be that you jumped both the gas valve and the switch at the same time. When I re-read it you in fact had done it right...jumped the wires to the switch. My appologies for confusing you.
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •