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    jmiglino's Avatar
    jmiglino Posts: 11, Reputation: 1
    New Member
    		  
    #1

    Jun 17, 2008, 02:23 PM
    Replacing Two CT-87 with LUXPRO PSPA711
    I currently have two Honeywell CT-87 Round Thermostats, one for heat and one for A/C. They are located right next to one another. I would like to replace the two thermostats with a digital programmable. Need help with the wiring. Heat is 3 wire and A/C is also 3 wire. Need help connecting to new programmable LUXPRO PSPA711
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jun 17, 2008, 05:25 PM
    You have to complete separate thermostats from your post. You will be much better served by professional ON SITE help. Combining two 3 wire systems can be very tricky. You can possibly cause damage if not done correctly.

    One tip. Dump the LUXPRO and get a Honeywell or White Rodgers thermostat.You will be much happier with a different thermostat
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