I just went through this problem and the fix was relatively easy.. but expensive. First make sure the fan motor is still good by running jumper wires to the fan motor plug .. positive on the right pole. If the fan turns on, it's probably the blower motor control module which is a small panel on the top of the blower box with two plugs on it's top. Remove the 3 screws, unplug the 2 cables and lift out the module. Install and reconnect the new module. I removed the negative battery terminal first to avoid any possible shorting. Next as an extra precaution I did a computer reset.
Reconnect the battery terminal, put the car in park with emergency brake on. Start the car and let it idle ..NO ACCELERATION for 15 minutes or when the engine temperature reaches 200. Next, put your foot down on the brake pedal and hold it for 3 minutes as the engine idles. Now, with your foot still on the brake, put the transmission in "Drive" and turn the A/C control to "auto". Let it run another 3 minutes, then shut the engine off and the car in "Park". When you restart the car the computer will be reset, and all your electronic information panel will be reset. Your gas "miles to go before empty" light should read "LO". After the car is driven a while the computer will update all the information
Turn it off.
Heater coil
This is an indication that your heater core is leaking. To stop the leaking you will have to replace the heater core or stop using your heater.
Please be more specific ... heater gives off heat, then cold air OR The heater fan runs for awhile then stops running
A bad Mass airflow sensor - on any GM vehicle that is equipped with one - will DEFINITELY stop the engine from running.
If you are not getting heat out of the heater, there are only a few things that could be wrong. The first is low coolant. You can't get heat without coolant running through the heater. If it is low, sometimes it has to be bled of air bubbles. If both heater hose running to the heater are hot, you have circulation. If not the heater could be plugged or not getting the coolant to circulate. There is also a damper in the heater system to stop cold air from bypassing the heater and that needs to be checked.
could be the blower motor, a fuse, or a bad wire.
your serpentine belt came off probably I just bought a 1996 Eldorado with this same problem. The car won't overheat because there is another belt and tensioner on the other side of the engine for this. Check the belt tensioner the spring probably broke causing the serpentine belt to be loose and fling off.
You stop running by slowly slowing down the rate of your running. Or basically, you slow down until you stop.
If the sentence is: "Alex, stop running." Then the verb would be "stop."
heater core
Open hood . Disconnect blower module located near blower fan. Disconnect, if blower shuts off, repalce module