Have HVAC Questions? Ask an HVAC Expert for Answers
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If that is happening check the batteries on the thermostat and change them it may be as simple as that, if you do not have a battery powered thermostat you may have something wrong with the furnace, so I would go and check the control board inside the furnace to see if any error codes are flashing on it and report back to me.
Can you get someone to the house that can?