Question about Intertherm P3RA-048K Air Conditioner

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Hi contractor replace air handler motor now 4 months later pop

I have a old unit, AHS won't replace it, had a new compressor,acumaltor,defrost board,outside unit fan motor and just 4 months ago attic air handler motor.. When my unit comes on it makes a pop sound like a door is opening somewhere, then a slight small pop sound a few seconds later.. It does the same thing when cutting off.. What is the proble... thanks George


P.S. before the new fan wheel was replaced I had a mildew smell coming out of the vent, the wheel was weighted down with crusty funky dust build up, now it doesn't smell that bad, just wondering if when my main line was clogged 2 years ago for 2 weeks the wetness penetrated areas up in my handler or flex duct and that's what I smell on occasion. thanks

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The popping sound could be the sound of the metal in the air handler flexing when the blower motor comes on and reduces the air pressure in the air handler. If your drain line was clogged then it is very likely that it over flowed into the flex duct.

Posted on May 03, 2010

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The mildew smell could have been created by the clog, but it also could have been created by low airflow and/or refrigerants leaks that can cause your evaporator coil to ice up and melt inside your air handler.
The "Popping" sound sounds like it is either your ductwork or the casing or access panel of your air handler.
If you still have the original ductwork, it should be thoroughly inspected for air leaks and/or degradation insulation (insulated will degradate in time). Re-seal and Re-insulate if necessary.

Without being onsite, with toolbox in hand, I hope you find this information to be very helpful to you, moving forward. :-)

Posted on May 03, 2010

  • laura Newman May 03, 2010

    Hello Graham,

    I hope you can reconsider the two-thumbs rating.........or please offer feedback why only two thumbs. Two thumbs indicates I failed to provide you with what you needed. Please explain what you more you need and I will gladly offer more assistance or help. :-)

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