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    sdholly5's Avatar
    sdholly5 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 21, 2012, 09:53 AM
    Why would my digital hvac thermostat go blank on the screen
    I have a robertshaw digital non-programable hvac thermostat, no batteries. The overflow condensation switch tripped the unit off. We fixed this but now my thermostat goes blank when I switch it to the AC. The unit continues to run and I must manually turn it off. What could be my problem. All worked fine until the unit was cut off by the sensor.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #2

    Jul 21, 2012, 10:38 AM
    That float switch interrupts power to the thermostat to stop making water(cooling the house).
    I would try to turn off the Breaker to the Air Handler and back on, hopefully it will reset.
    Many Digital need batteries?
    I take it you corrected the clog.
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