Question about Honeywell Furnace Gas Valve Sv9501h2409

1 Answer

When the heat cycle calls for gas there is no ignition is my gas valve bad?

I am getting 24 volts from the control vale to my gas valve constantly. should there be a standing pilot light present on this model?

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I don't know what kind of furnace you have. But most furnaces have some sort of pilot first than after it is proven than the main gas will come on. Either a standing Pilot with a thermocouple. A hot surface ignition or Spark ignition with a flame sensor. Or a direct fire system where hot surface or spark ignitor start first than all the burners send a 1 sec blast of gas which is proven by the flame sensor if it proves the gas valve stays on.....
In what you have said you have 24 volts to the gas valve and it has not lite. then does the gas valve have a pilot tube???Does it have a thermocouple?? Do you smell gas?? If you don't smell gas then the main part of the valve has not opened. The Pilot valve has to open first and prove before the main gas will come on. I hope this helps. If you still need help repost with the name and model # of the furnace.

Posted on Nov 18, 2013

Testimonial: "there is a pilot tube and the hot surface ignitor lites up, I don't smell gas. So should I replace the gas valve or the pilot valve or both. What should I charge for a job like that?"

  • 3 more comments 
  • Joe A H. Nov 18, 2013

    I didn't see that you had said what model of valve you had... that valve has an Intermittent Hot Surface Pilot Ignition. So make sure you are getting voltage to the ingitor.

  • Joe A H. Nov 18, 2013

    The hot surface ignitor is more than likely burned out.so it would have to be replaced. You can OHM it out should get some kind of reading if it is ok.

  • Jermaine James
    Jermaine James Nov 18, 2013

    but the ignitor lites up

  • Joe A H. Nov 18, 2013

    Then you will need to replace the gas valve.The ignition is built into the gas valve. The controls provide intermittent pilot gas ignition sequencing, pilot flame sensing, and both pilot and main gas control functions in a single control. The gas valve is pretty expensive and it should take about an hour to change it out.

  • Jermaine James
    Jermaine James Nov 18, 2013

    thank you this information was really helpful and has pointed me in the right direction.

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