And when your furnace is getting better then it will show a steady light from the ... Malfunctioning blower motor. blocked returns. a stopped up heat exchanger. or a ... times stops blinks 4 times this is continuous when furnace in running. furnace.... This vehicle came in with the blower motor running at high speed even with the ... Knowing my husband he'll wait until the heater stops working completely. ... replaced the resistor, worked great for about 30 min then quit working except on... d