Switch problem? Cables disconnected?
The heater motor speed resister is burned out.
it has a partially clogged heater core.replace the heater core
The blower motor speed resistor is burned out.
you need a new blower motor resistor
Yes there is, but it only operates the high speed function.
The blower motor speed resistor is burned out.
If it has only high speed, the blower motor resistor has to be replaced to get all speeds back.
i can turn the blower speed on low and the air gets warm , but not hot . then i can turn it to high and it get even cooler Check your thermostat, it may be stuck.
Because the resistor between the heater swithch and the heater motor is not functioning. Usually mounted on, in or near the heater enclosure. Its a common repair, and can be done by the do-it-yourselfer.
Your heater will blow cold air only.
It is the resistor, replace it.
The most likely problem with the heater blower on your 2003 Sable is the blower resister. The resister can go bad and cause you to only have one speed.