On 07/16/2017 08:44 AM, sammy wrote:
my blower runs all the time and the furnace kicks on even though the
thermostat is set to low and switch set to off

How warm is it inside? Is is a gas furnace with the pilot light burning?
Sometimes that's enough to trip the thermal switch to turn the blower
on. If so, turn the pilot off and relight it in the fall.