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    mrussell425's Avatar
    mrussell425 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 2, 2010, 04:17 PM
    Replacing a carrier thermostat with a honeywell rth7500d
    Have a carrier hh93az173a and installing a rth7500d unit is not cooling fan old unit has 8 wires on it
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Jul 2, 2010, 08:11 PM
    Guessing maybe you didn`y tag/label the wires as you removed them from the old tstat
    The colors are not always put where the rule of thumb says they should go

    Did a installers manual come with the honeywell?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Jul 2, 2010, 09:04 PM
    http://customer.honeywell.com/techli.../69-2487ES.pdf
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