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

    Jun 19, 2007, 06:45 AM
    Thermostat display is blank
    I have a Honeywell programmable thermostat and the display is blank. We had a bad storm and the power went out. I have checked the breaker and reset it. The blower will come on when I switch it to ON, but nothing else works. Can someone help?
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #2

    Jun 19, 2007, 08:42 AM
    Try turning off power to Air handler for maybe 30 seconds.
    I would change battery in Thermostat.
    atanner's Avatar
    atanner Posts: 3, Reputation: 1
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    #3

    Jun 19, 2007, 08:48 AM
    Thermostat does not have a battery.
    esquire1's Avatar
    esquire1 Posts: 2,483, Reputation: 209
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    #4

    Jun 19, 2007, 08:55 AM
    Do you have a multimeter? You need to check for 24 volts at thermostat. I have seen transformers blow with storms. Or you may have a 3amp or 5 amp fuse (looks like auto fuse) in the circiut board inside the airhandler. This fuse could be blown.
    atanner's Avatar
    atanner Posts: 3, Reputation: 1
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    #5

    Jun 19, 2007, 09:17 AM
    I have 24 volts at the thermostat.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #6

    Jun 19, 2007, 10:11 AM
    Did you remove power to Air handler and turn back on?
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
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    #7

    Jun 19, 2007, 04:41 PM
    Check for loose connections at the furnace and thermostat, it sounds like you may have a loose 24 volt or common wire.

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