Most likely a plugged core. You can try flushing it, but you may end up replacing it.
Replacement of the heater core on a 1993 Mazda Protege is going to first require the removal of the entire dashboard. Once that is removed then the heater control box will need to be removed and disassembled in order to get access to the heater core inside.
try going on ebay!
The heater on the 03 Mazda Tribute is going in and out. What is the problem and how can it be fix?
battery may be dying and altenater may be going out
It Is underneath the dash on the drivers side, You are going to have to stick your head up underneath sometimes to find it.
not likely. the 1997 Mazda protege is a different chassis than the 1999 protege (BHA to BJ, respectively). the two transmissions between the two generations are also different, the BHA utilizing the FB4A-EL automatic transmission and the BJ utilizing the FN4A-EL automatic transmission. they also have different engines. you're better off going to a junkyard and pulling a auto trans from a third generation protege (1999-2003)...that would work. if you have any further questions, you can follow this link: www.protegefaq.net hope this helps!
Check out this site: http://www.clubprotege.com/wil/howto/seatbeltlight/
if your horn wont go off its a short to power or faulty conector
Probably have a burned out resistor. These are not expensive and usually easy to change. They are locaded near the heater fan motor and have a plug going to them of 3 to 4 wires... Unplug it then remove the screw(s) & pull it out. Replace in reverse order.
the heater core is going out
Possibly low of fluid. If it is not low, then have the transmission and filter changed and see if this helps.
I had this issue just a few months ago. Your clutch is going out. I had the flywheel and slave cylinder replaced on my '96 Protege (stick-shift) to fix it.