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    pe425's Avatar
    pe425 Posts: 4, Reputation: 1
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    #1

    Mar 12, 2008, 12:13 PM
    Thermostat turns on furnace and then thermostat shuts back to HOLD
    I believe that when we re-run the program with the correct date and time, if the temp has to go up, the furnace runs until it gets the appropriate temp, then it turns off and when it does that, the thermostat also turns off going to the HOLD state.:confused:
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
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    #2

    Mar 12, 2008, 12:46 PM
    Brand of thermostat?
    Model number of thermostat?
    pe425's Avatar
    pe425 Posts: 4, Reputation: 1
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    #3

    Mar 12, 2008, 08:40 PM
    White-rodgers
    Digital comfort set II
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
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    #4

    Mar 12, 2008, 09:30 PM
    I need the real model number to look it up. Usually a F110-23b or some such number. If not accurate I cannot help.
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    pe425 Posts: 4, Reputation: 1
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    #5

    Mar 13, 2008, 04:11 PM
    The model is 1F90-51
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
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    #6

    Mar 13, 2008, 04:18 PM
    You need to take your thermostat out of the hold mode. Read all of this info about your t-stat.

    http://www.white-rodgers.com/wrdhom/...037_5099_B.pdf

    I am also tossing in the install manual just in case you need it someday.

    http://www.white-rodgers.com/wrdhom/...-5043rev_B.pdf
    pe425's Avatar
    pe425 Posts: 4, Reputation: 1
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    #7

    Mar 14, 2008, 09:39 AM
    But when I run the program and the t-stat goes to HEAT, after the temp in the program is reached, the T-stat turns off and the status is sent back to HOLD.
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    hvac1000 Posts: 14,540, Reputation: 435
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    #8

    Mar 14, 2008, 12:02 PM
    I am sorry the directions did not help you. If you read and followed the directions to remove the hold feature and the thermostat still will not work to your satisfaction then the thermostat is probably defective and you will need to replace it.
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