I have a Rheem 90 gas furnace RGSA10EZAJS and The blower for the inside runs all the time I unhooked the thermstat wires to make sure it wasn't it I have also replacedthe IFC board but it still runs all the time and the furnace will not work I hope you can help Thank You

Is this the fan circulating air around the house or the fan circulating combustion gases through the furnace?

This is the blower fan for circulating air around the house

Are there any lights blinking on the control board? Sounds like you have an open limit. Check all limits to make sure they are closed.