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I have a Ruud Acheiver 90, I'm having some problems, the rollout (burner) limit switches are opening, and there is an electrical burning smell. It seems that sometimes the squirrel cage isn't kicking on, but when I reset manual limits and give the squirrel cage a manual turn, the heater runs fine, sometimes. I guess what I'm asking is: would the fan motor only work sometimes, would the ignition plug give off an electrical burning smell (it's lighting fine), there is a separate thermocoupling, it seems to be fine..... Filter is new.... Just wondering if the squirrel cage's start/run capaciter would be the cause.... IFC seems to be operating fine... All other systems seem to be operating fine... It's almost like the fan motor is getting stuck, and when it doesn't kick on, the limit opens up... Please Help.....

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  • makohotrod Jan 23, 2009

    I yanked the squirrel cage and am replacing it today with all caps....

    Thanks man.... Rock On!!!

    HotRod

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Thanks for your question,
yup your fan motor is bad, if you need to manually start it each time then the motor winding are bad and it is not getting the air across the coils, which in turn are over heating, thus causing a burning smell, and then tripping your limits, you need to replace this motor ASAP, before it does cause a fire, if the limits ever fail !! I hope this was helpful for ya, if it was please give this a rating, thanks again,
mr.grzz

Posted on Jan 23, 2009

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