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Possibly the plugs either aren't connected properly or incorrectly plugged. Recheck the plugs. Also check fuses, maybe one blew while it was being plugged. The work should have been done with the battery disconnected for that reason.
I assume your heater setting is electric control, if so either your defrost and floor heat switch failed or wire problem.
For the air not hot, check the heat control valve on the top of the hose it should be in front of the firewall. I don't know your car is using mechanic valve or electric control valve. Anyway check there first.
Good luck.
Fan as mentioned, but can be a fuse, or fan speed control. If you can get to plug on fan can feed power and ground to see if it runs. Common for the speed control to go bad. Some models have a ceramic block with a coil in it. The coil consumes power to allow slow speed fan meeting. They get hot and burn up.
If the ac is turned on and it comes threw the defrost,then it is not the cooling fans,but check them to see that they are coming on,and they are turning fast,the control head is more likely the problem.
i believe this is a vacuum operated system. if there is a problem with the vacuum supply to the control unit, it will automatically default to defrost. i would start by checking the vacuum source lines. good luck!
I would think the door you hear flapping is the door that controls the airflow across the heater coil - and the fan keeps blowing the door closed, preventing the airflow from going across the heating coil. I don't know whether this vehicle is vacum controlled or cable controlled - so either it's a disconnected cable, or a leaking vacum line.
I would suggest replacing the blower motor resistor. When this component fails the blower will only work on one spped or none. This is a very common issue with all automotive models
wow...here it is spring and no one answered either of you? Is there a large volume of air when fan is on high? Where is it going? Or do you not hear anything from the fan? The 240 has an awesome heater. On high it would heat a small home! If no sound, your blower motor is dead assuming the fuse is good. If you hear the fan blowing, figure out where the air IS going. Note that the only way to turn the dash vents off is with the white Oreo dials. To defrost, only that button should be pressed in and dash vents off. Behind the dash switches there is a maze of short vacuum hoses. Often times, people monkey w/ these and reconnect them incorrectly. Haynes manual or Chilton's have proper diagrams. It could be that the vacuum hose coming from the manifold and entering the firewall is split on the under side and not visible, also.
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