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After a power outage and surge, I tried to run the carrier high efficiency furnace "FAN" only to circulate air in the warm house. when I stated the blower, it ran on slower spped than normally.usually cycles between high and balst furnace high....now its running slow.I tried the heat cycle and the blower speeded up a minor amount over just with the fan circulating....is there an internal circuit breaker that could've beed bitten with the surge??

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Try replacing the fan capacitor some time power surges zap them.

its usually a 5uf or 10uf @ 370vac if you change it and runs fine it was the capacitor if not blower fans keeps slow verify that full voltage is getting to it ex 230 volts or 115volts verify with a voltmeter if you get voltage.

Posted on Apr 26, 2008

  • Alexander  Figueroa
    Alexander Figueroa Apr 26, 2008

    i forgot if you can take a snapshot of the diagram of furnace i can probably troubleshoot it from home and give you a better advice

    hvac.tech7872pr@gmail.com

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Hello jedoppler,

It does look like an internal IC could have been burnt by the power outage. However, I recommend that you get this fixed by a competent technician, rather than a DIY job, as it could be quite complicated isolating the faulty chip.

Hope that helps...Should you have any further questions, please feel free to post them here.

P.S. Before you assign a rating, please make sure that the issue is resolved or you are satisfied. If not, please post back as to what you did, and/or any other questions you may have, and I will try to assist you as best I can. Please do not assign an ‘Inappropriate’ or ‘Thanks for trying’ rating if your issue is not resolved after the first response itself, as sometimes a bit of to and fro dialogue may be necessary before we can find a fix or an answer to your query.

If you find that the solution/answer I provided led you to, or resulted in a fix, please close the ticket with a FixYa! rating. I would be very grateful for your show of appreciation.

Thank you for using FIXYA!

Cheers!
IrishDruid

Posted on Apr 26, 2008

  • Swilin Sampson
    Swilin Sampson May 02, 2008

    Just checking to see if your issue has been resolved… If
    you find that the solution/answer I provided led you to, or resulted in a fix,
    please take a moment to close the ticket with a FixYa! rating under my
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    I would be very grateful for your show of appreciation.





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