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confused in Rhode Island . . . low sensor signal but pilot stays lit on Bradford White Defender

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archibald tuttle
archibald tuttle Member Posts: 1,167
in Domestic Hot Water

its a two flash then pause fault code on an MI5036FBN and the manual details sensor testing procedures which are fairly standard. my confusion is why does the pilot light stay on if the sensor is low? is there some gray area where it will leave the pilot on but not light the main burner on these? this is new territory for yours truly.

thanks. brian

Comments

  • Mad Dog_2
    Mad Dog_2 Member Posts: 8,436
    edited January 4

    You need The Great Timmie Mc Elwain. He's right in Warwick. Mad Dog

    Consulting by Mad Dog & Matt Jr.
  • Big Ed_4
    Big Ed_4 Member Posts: 3,385

    Cheap electronic thermostats .. Keeps us working I guess :)

    There was an error rendering this rich post.

  • Mad Dog_2
    Mad Dog_2 Member Posts: 8,436

    I sent Timmie a kite via email about this thread. Hopefully he jumps in shortly. Mad Dog

    Consulting by Mad Dog & Matt Jr.
  • Mad Dog_2
    Mad Dog_2 Member Posts: 8,436

    Brian DM me. I have some info via Timmy. Mad Dog

    Consulting by Mad Dog & Matt Jr.
  • 109A_5
    109A_5 Member Posts: 3,538
    edited January 4

    The gas valve assembly is powered by a powerpile or thermopile (the pilot). If it shut off the pilot the gas valve would go dead and you would have no diagnostic codes, I would think that would be worse with this high tech junk.

    Personally I liked the older thermocouple gas valve types better, they seemed more reliable and easier to repair. Seems like the industry is going backwards for no good reason other than maybe to keep engineers employed.

    image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
    Big Ed_4

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