Check to see if the a/c compressor is not locked up first..........
removal of heater hose from engine to fire wall
There are a couple of reasons why a 1999 Oldsmobile Alero ac heater to stop working. The heater coil may need to be replaced or the HVAC blower motor may need to be replaced.
Could be low on freon,
Possibly a relation to the blower motor/ heater door accuators.
The AC and heater are completely different subsystems. The heater relies on heat generated by the engine and circulated by the engine coolant (radiator fluid) while the AC uses a belt driven compressor and separate fluids. Their only normal commonalities are the blower motor (which you said works), the ducting and the control head.
There is a fuel leak in the engine compartment. Have a mechanic look at the engine.
Is your radiator fluid full?
Mine is doing the same thing, keep having to pull fuse to stop it
No. You may be leaking engine coolant from the heater core or leaking refrigerant oil from the AC evaporator.
no , the heater core provides heat to the interior for the passengers
You ned to put caulking around the top joint of the heater AC box where it mounts to the fire wall.
If you have a plugged AC condensation drain, clear water will back up and end up on the passenger floor. If the heater core is leaking engine coolant you will have engine coolant end up on the passenger floor.