Where is the blower relay on my BMW e46 1999 316i?

I asked question regarding heater probs on my bmw as it blows cold air. But the air is very slightly warm at times and was told it could be the heater relay!..Can any one give advise?Where is the blower relay on my BMW e46 1999 316i?You probably have some air trapped in the system.



Bleed it out by running the engine from COLD and turn on your heater to the hottest setting. Immediately open the bleed screw next to the radiator filler cap to let the air out, and only tighten when coolant starts coming out. Top up the coolant and repeat if necessary.Where is the blower relay on my BMW e46 1999 316i?If the heater puts out hot air when you're driving fast but the heater fan motor isn't working, it may be the resister that controls the fan speed. This is located on the drivers side just to the right of the gas pedal under the console trim. It's mounted in the heater box.

Make sure you have anti freeze in the radiator, if it's low you could have an air pocket in the heater core causing it not to heat up. Look for leaks if the level is down.Where is the blower relay on my BMW e46 1999 316i?Technically, there is no blower relay. What controls the speed of the blower fan is called a final stage switch or resistor pack. And if the blower works from low to high, and does not switch on or off intermittently, there is no problem with the final stage or the blower itself. It is attached to the right side of the evaporator/blower assembly, approximately where the left knee of the right front passenger is only a little farther forward, but hidden by a trim cover.

If it blows hot or ambient air even when you are using the aircon, then your aircon may have problems. Or, the heater valve may be sending hot coolant/water to the heater core when it is not supposed to do so (the heater valve is at the left side of the engine compartment, bolted on to the inner side of the fender well, switched on by a cable connector, and having 2 rubber hoses connected to it).

If it blows ambient air, not hot, not cold, then it is a problem with mixing of air inside the evaporator which is controlled by

ducts powered by stepper motors.