Question about Ruud UBHC Air Conditioner

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I have a Ruud Achiever 90 plus furnace that will not ignite

I can't get my furnace to ignite and don't know what to check. It was a used furnace so I hav no manual

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  • 7 more comments 
  • 3aaamom Jan 18, 2009

    The blower motor stars, but it will not ignite.

  • 3aaamom Jan 18, 2009

    The small inducer blower does come on but the furnace doesn't fire up. We've tried turning off the power switch and waiting several times. By the way this is a propane fueled furnace.

  • 3aaamom Jan 18, 2009

    Many many thanks to both of you for your help, After many times of looking at this, he found thr problems. It was the orange tube. Thank you so much for saving us the cost of a repair visit. In todays economy, it was much appreciated.

  • 3aaamom Jan 18, 2009

    Carldc3 hit the nail on the head. We have igntion and heat.

  • 3aaamom Jan 23, 2009

    carldc3 was a godsend literally. My husband works out of our garage and without that furnace, it was in the twenties. Many many thanks to Carl.

  • carl carpenter
    carl carpenter May 11, 2010

    coming from the induced draft motor is an orange or gray rubber tube leading to a switch pull the end off that is connected to motor and poke a wire or something to insure the hole is not blocked if it is not replace the hose. next step is to check the switch make sure if possible try to jumper 2 wires and turn unit back on if it works then either switch is bad or vent piping is blocked.. For your extreme Safety, Please Do Use Furnace in this condition until problem is fixed. thanks

  • Perry Putnam
    Perry Putnam May 11, 2010

    Need more. Are you saying the main blower or the small inducer blower comes on. What kind of igniter spark or hot surface(glow coil). Have tried resetting the furnace by turning off the power switch for a few seconds?

  • Perry Putnam
    Perry Putnam May 11, 2010

    Does it do anything at all? If so what?

  • wolftrck
    wolftrck Sep 27, 2012

    Hi Carl, first of all I want to thank you for your time here helping people,God Bless, I have a ruud achiever 90 ifc board ok light blinks twice every two seconds, manual say pressure switch, coould this be the same issue, I can hear a relay switch kick in but wont ignite and then the ok light starts blinking.

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Again is this a spark or a glow coil? If it is a glow coil look at the coil and see if there is a crack or white spot on it. If so it needs to be replaced.

Posted on Jan 18, 2009

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Coming from the induced draft motor is an orange or gray rubber tube leading to a switch pull the end off that is connected to motor and poke a wire or something to insure the hole is not blocked if it is not replace the hose. next step is to check the switch make sure if possible try to jumper 2 wires and turn unit back on if it works then either switch is bad or vent piping is blocked.. For your extreme Safety, Please Do Use Furnace in this condition until problem is fixed. thanks glad i could help

Posted on Jan 19, 2009

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