Check the blend door actuator.
It doesnt defrost particularly well.
if it doesnt have a rediator then fill it through the reservoir bottle
is the word that doesnt go with the sentence
my heat doesnt work in my2000 lincoln ls what causes this
it doesnt. you should get that checked it may be a problem with the relay
The compressor is coming on because you have the heater set to defrost. Take it off defrost and the compressor will not come on. I would suspect the compressor is locked up.
fuse
have your catalitic checked, it could be cloged.
only if it doesnt have fluid.
The fan motor has failed and will need replaced.
Have you checked the fuse and relay? - They are in the engine compartment above the passenger strut.
no it doesnt the site always is being checked by moderators and it has a renewed engine that is virus free