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    perdomo's Avatar
    perdomo Posts: 17, Reputation: 2
    New Member
    		  
    #1

    Sep 17, 2009, 06:35 AM
    DUCANE furnace and Honewell Tstat - AC OK - No Heat
    AC works great - no problems.
    When switching over to Heat there is nothing; the circit board on the heater is getting power but nothing is turing on. The Honeywell Tstat is showing "HEAT ON"

    Trouble Shooting so far:
    Installed new 5 wire from the Tstat to the Heater/AC unit
    All the color wires match up from the tsat to heater
    Fan does spin if I use my finger to move it (not seized)

    Any suggestions would be great! :)
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Sep 17, 2009, 02:53 PM
    Read the post at the link below then post back to here with more information.

    https://www.askmehelpdesk.com/heatin...00-284131.html
    perdomo's Avatar
    perdomo Posts: 17, Reputation: 2
    New Member
    		  
    #3

    Sep 21, 2009, 05:21 AM

    Got it working - Bad T-stat...
    Mek83's Avatar
    Mek83 Posts: 5, Reputation: 1
    New Member
    		  
    #4

    Oct 16, 2009, 11:32 AM
    Same Problem... Changed the T-Stat, still nothing. Circiut board making a loud "Crackling noise".
    I have a Ducane Gas Furnace
    Model CMPE075U3
    Downflow/Horizontial Right

    Old T-Stat.. Old mercury kind
    Replaced with Honeywell RTH7600 Touchscreen Programmable.

    I was able to get cool air from it, now when you switch to either or you hear that noise from the board, like a swoosh crackling sound.

    Any ideas?
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