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Thread: Switchover from Heat to A/C question

  1. #1
    DIY Senior Member mrmichaeljmoore's Avatar
    Join Date
    Jan 2007

    Default Switchover from Heat to A/C question

    My Amana furnace (AMH95) was installed January 2007.
    Had a new Amana A/C Compressor and coil (Amana ASX14; 2 ton) installed last year.

    Other than having a pro come out for annual service......
    Is there anything I need to do in order to switch from heat to A/C?
    Or can I just move the switch on the thermostat to cool and fire up the A/C?

    Oh, and yeah.....I will change the filter before I fire up the A/C.


  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    Depends...I have a by-pass humidifier in my system, and to switch over I (should) close the bypass duct damper.

    On some systems, you might get better operation if you switch the fan speed, but that isn't as common.

    You should change the filter more often than change of seasons! but other than that, flipping the switch may be adequate.

    Some houses are installed with multiple exhaust registers...it works better to exhaust cooled air high and heated air low. If you have multiple ducts, both high and low, close the lower ones and open the higher ones.

    My house is an open design and I find in the winter I direct much of the heat downstairs and it gets upstairs. In the summer, I direct most of the cooling upstairs, and it gets downstairs. Having good return ducts may change your operating parameters.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    In the Trades MaintenanceMan's Avatar
    Join Date
    Dec 2008


    Change the filter and turn it on. If your going to have it serviced then the Tech will take care of any other cleaning it might need.


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