The thermal fuse in the blower motor resistor pack has blown. This is a very common occurrence on this car. A replacement resistor pack costs about $18.
It is fairly easy to replace if you have mechanical experience. Search the web for "blower motor resistor replacement sebring 1999" and you'll find lot's of explanations of how to swap it out. One caution> DO remove the pack by taking out the two 8mm screws, THEN disconnect the connector. Trying to disconnect the connector while the pack is still in position will drive you nuts.
Spray the inside of the connector with silicone spray (from your parts store where you get the resistor pack, about $3 for a can) before putting the connector back together (don't get it on the resistor coils). This will make the connector slide together much easier.
sounds like you should try and replace the relay and see if works after that. could be a switch.
Loose connection?Bad switch?Flat spot in motor?
whats wrong with it
you have a bare wire touching on your blower motor
Get a new switch.
must have air in the cooling system
The neutral safety switch could be bad or the ignition switch is bad .
The switch is bad. Grease inside the switch has burned.
Does it turn over? Does it have spark? Fuel?
Sounds like it could be the actaul switch that's used to select the speeds. ADDITIONNAL INFO SEE DISCUSSION PAGE.
Could be a bad ignition switch
First disconnect your kill switch, if that is not it, check your plug cap, then if that is not it go on to your stator.