cause i left my btoy on it
sounds to me like your blowe moter is shorted out. u can use a test light to check for power at the motor,if you can also pull fuse out of fuse box to check fues BUT the blower motor will notstop heater working if no heat ,it is your heater core
by melting it
find the wire/plastic holder that is melting and replace it, ethly amines smell fishy andare given off by melting /smouldering plastics. bicarbonate of soda in a small cup will absorb most smells.
It is possible that melting plastic in a dishwasher or other appliance can create toxic fumes. It largely depends on the type of plastic which is being melted. The best bet would be to properly ventilate the area and go into another area of the house until the smell is gone.
If it's a sweet smell then its probably a heater core leaking antifreeze.
No, because you'll be melting plastic, and melting plastic does create toxic fumes.
Smell
A bad smell coming from the heater in a vehicle can indicate a bad heater core. One way to check this out is to see if the smell is worse when you sit in the passenger seat. If it is, there is a good chance the heater core is bad.
plastic cover for heater motor
no
by melting plastic
A fuel leak. A coolant leak, coolant has a sweet smell. An exhaust leak. A burnt clutch. A burnt rubber smell, from a slipping accessory belt/tensioner or rubber contacting the exhaust. A Moldy smell with the A/C on from a dirty/moldy evaporator. An oil leak, if it is leaking near the exhaust manifold, from say the valve cover. A smell from burnt brakes from a faulty brake caliper. A burnt plastic smell, from plastic melting against the exhaust( wiring loom, or plastic bag on catalytic converter). A. mildew smell caused by a water leak, clogged evap case drain, flogged sunroof drain.