check and see if the thermostat been removed
check to see if the heater core has been bypassed. if the heater core was leaking at some time in the past, the previous owner may have bypassed it (with a 2 dollar hose bypass kit) instead of actually fixing the leak. this was the case on my 1990 xj6.
See related link. Click on Owner Guides The owners manual ( which includes the fuse panel diagram ) can be viewed on-line
Check Owner's Manual. If you do not have one. Check Related links below.
Check the fuses first and the blower relay.
Check the fuses first. look in owners manual for location of fuse box.
The air blower and the cruise control are completely powered by separate fuses. It is possible that both have blown fuses.
Blower Motor FusesStraight from the Owners Manuals1986-1995 - Relay #A and B in the engine compartment distribution box (See "Related Questions" below)1996-1999 - Fuse #13 (inside box) and relay #11 (engine compartment)2000-2005 - Fuse / relay #3 and fuse #8See "Related Questions" below for more information about fuses boxes in the Taurus / Sable.Answer According to the Owners Manual, the blower motor relay/fuse is in the engine compartment fusebox, #11See "Related Questions" below for more
Check your owner manual. If you need a copy of a FREE manual. Click on the Related Links below. Check under fuses.
you probably need a new blower motorCheck the fuses too -See "Related Questions" below for more
Check Owner's Manual. If you do not have one. Check Related links below.
Check Owner's Manual. If you do not have one. Check Related links below.
It could be the blower fan resistor or the relay
You did not mention the kind of car. Check the fuses and relay to be sure you have power. Also you have a blower motor resistor and the fan motor. Grounds are just as important as the power source.