It's usually the heater grid. Find an auto upholstery shop and see if they do repairs on seat heaters. Otherwise, you can go here: www.heatedseatkits.com
Rick
I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology. Visit my blog for cool articles and TSB's: http://free-auto-repair-advice.blogspot.com
because it's broke
doesnt have one
Heater core is leaking.
Could be: Low coolant in the radiator - or - thermostat stuck open - or - heater core plugged.
How do I adjust my emergency brakes on my 1999 ford expidition?
on the drivers side up by the accelerator pedal behind theengine cover or doghouse
wheres the bottom ac valve on a 1999 ford expidition
Parts and labor aprox $3400.
see owner's manual
Instualation of a heater core on a 1999 Ford Explorer V6, how do you install the heater core.
if it doesn't heat your heater core is most likely clogged and if it doesn't blow at all then the blower is messed up.
How much will it cost me to replace the heater core in my 1999 Mercury