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  1. #1
    Join Date
    Sep 2012
    Location
    Florida
    Posts
    4

    Trane / American Standard air handler blower fan never shuts off

    First post here ...

    I just bought a 10 year old house that has a split HVAC system (outside A/C unit with an inside air handler/electric heat unit).

    The air handler is a Trane model #TWE048C14

    Even though the thermostat is in the Fan Auto position, the blower in the air handler continually runs (even when the A/C compressor outside turns off)

    I replaced the old Honeywell wall mounted digital thermostat with a brand new Honeywell touch screen thermostat in hopes that the new thermostat would fix this problem, but it did not. Everthing is wired correctly. In fact, even when I remove the new thermostat from the wall, the air handler blower always runs. The only way to get it to turn off is by flipping off the air handler's circuit breaker in the main circuit breaker panel.

    From what I have read on various internet sites, there are many parts in the common residential air handler that could cause this problem ....

    1. Sequencer

    2. Fan Relay

    3. Contactor

    4. Circuit Board

    I am hoping someone here might have previous experiance with these Trane / American Standard air handlers that might lead me in the right direction with this. Maybe my Trane don't have all 4 of the items listed above, but maybe one of the parts listed above are common in these Trane units that cause the blower fan to keep running 24/7.

    Any help would be very much appreciated.

    Ron,

  2. #2
    Join Date
    Sep 2012
    Location
    Florida
    Posts
    4
    I did some more searching. It looks like this part is what usually fails in the Trane / American Standard air handlers, and causes the fan to run continually:

    Fan Time Delay Relay (replacement P/N: RLY02807)

    Not expensive either

    _________________________________________

    (various websites selling this part)

    http://www.amazon.com/RLY02807-RLY02.../dp/B003GQEZJM

    http://shortyshvac.com/index.php?mai...oducts_id=1158

    http://www.myhvacparts.com/store/tra...-rly-02257.php

    http://www.hvacpartsshop.com/rly0280...elayrelay.aspx


  3. #3
    Join Date
    Sep 2012
    Location
    Florida
    Posts
    4
    I just re-read the forum posting rules.

    I am not asking information as to how to replace this part ... but if my thread sounds too much like a DIY thing, please delete it and I will go elsewhere.

    Thank's

  4. #4
    Join Date
    Sep 2012
    Location
    Florida
    Posts
    4
    83 views, but no comments

    Time to move on

  5. #5
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,287
    Quote Originally Posted by Turbo6ta View Post
    83 views, but no comments

    Time to move on
    GREAT Idea. Even better, MOD to CLOSE ! !!
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

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