The draft inducer blower is on all day, there is a red light in the ctrl panel when the burners come on, the burner will shut off when the blower fan comes on.  will not reach temp. 70  I replaced the thermostat and cleaned the flame sensor. do i need to replace the flame sensor.

Tools & Hardware - Others - Omega - Trane Furnace Draft Inducer Blower 115 Volt Variable Speed...