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    rsaleme's Avatar
    rsaleme Posts: 3, Reputation: 1
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    #1

    Sep 27, 2009, 05:45 PM
    Thermostat reading rises as room temp drops-AC won't turn off
    Hi,
    I had an Carrier Model 58STA/STX system installed to cool/heat a 400sqft. Room in my shop. My thermostat is a digital CTC Model 43054.
    Specific problem is the unit never shuts off automatically - the termostat reading starts rising when I turn thermostat switch on to cool. The room cools down no problem. When I turn thermostat switch off - the reading starts dropping. What is the problem?? I hooked the thermostat up in the following order: (Left to right) Blank/G/Blank/Y/R/Blank. The last two terminals are jumpered.

    Appreciate any help.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #2

    Sep 27, 2009, 06:01 PM
    You have a bad thermostat. Time to get it replaced.
    rsaleme's Avatar
    rsaleme Posts: 3, Reputation: 1
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    #3

    Sep 27, 2009, 06:16 PM
    Quote Originally Posted by T-Top View Post
    You have a bad thermostat. Time to get it replaced.
    Was hoping I hooked it up wrong or something. The thermostat is brand new. Thx for the reply.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #4

    Sep 27, 2009, 06:25 PM
    If the temp reading on the t-stat rises as it gets cooler in the room. The t-stat is bad.(Bad resistor in the stat)
    rsaleme's Avatar
    rsaleme Posts: 3, Reputation: 1
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    #5

    Sep 27, 2009, 06:32 PM
    Quote Originally Posted by T-Top View Post
    If the temp reading on the t-stat rises as it gets cooler in the room. the t-stat is bad.(Bad resistor in the stat)
    Ordering a new one right now. Should be here in a couple days. Will let you know. Thank you.
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