Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

4 Answers

Replacing thermostat replacing my home thermostat with a honeywell focus pro 5000. my present thermostat has a blue,green,red,white,yellow wires. the new thermostat has hookup for green,white,red,yellow wire and a c for common. what do i do with the blue wire? does it connect to the c common plug?

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  • medvanrey Jun 23, 2008

    MY THERMOSTAT HAVE 5 TERMINALS OF WIRES,

    When I moved the lever to on position nothing happen, no power..

    The thermostat have 5 terminals, 4 colors as follows:

    GREEN..........1 wire

    YELLOW........1.wire

    WHITE............1 wire

    RED h is connected to RED c

    What may be the problem? PLEASE.

    What wires to test for power?

  • jv8404 Jun 23, 2008

    Me 2, everything is connected except the blue wire. My problem is that I cannot control the temprature. It will go up or down but will turn on.

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4 Answers

It was hooked to the blue terminal on the old 1 but the old one was not a programable

Posted on Sep 19, 2008

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YES THE BLUE WIRE DOES CONNECT TO THE C TERMANAL FOR COMMON

Posted on Sep 12, 2008

The four colors of wires, where or how do I install in the termostat?

Posted on Sep 03, 2008

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What is the blue hooked up to now?

Posted on Jun 18, 2008

  • KennyD1976 Sep 16, 2008

    irritating how no one answers WHAT WAS THE BLUE WIRE HOOKED UP TO ON THE OLD THERMOSTAT?

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