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air handler transformer keeps blowing!!!

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HELP!!!! I've pulling me hair out!!!! Original prob was air handler lost 24 volt output. I replaced transformer with a

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Old 01-23-2011, 12:55 PM
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Question air handler transformer keeps blowing!!!
Model Number: carrier aq40 air handler   Brand: -brand-   Age: More than 10 years   

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HELP!!!! I've pulling me hair out!!!! Original prob was air handler lost 24 volt output. I replaced transformer with a slightly undersized one....40va instead of the spec'd 60va......and it ran for about 10 mins..then blew. Now I put in a new 75va transformer...and it ran fo 10 mins or so..and then blew. I did check the wiring on the heat pump outside to see if any insulation had melted, creating a possible short circuit...but all seemed fine. Any ideas anyone? Thanks to all!!!!


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  #2 (permalink)  
Old 01-24-2011, 06:45 PM
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Hey all! I did find a wire to metal contact inside the heat pump outdoors..so i fixed that and all seems to be running fine...except a spark arced inside the heat pump that MIGHT have damaged something else now!
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