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have someone check your starter out i had the same trouble and it was my starter
The heater fuse for a 1993 Geo Tracker is located in the fuse box that is inside the engine compartment on top of the battery. It would also be a good idea to check the wires on the heater relay that is on the passenger side of the engine compartment on the fender wall. It is just behind the washer fluid receptacle.
What temp. thermostat did you put in? Try a higher temp. one. or check to see if heater core is clogged
Check for vacuum leak or bad vacuum motor Check selector control
You will need to check the vacuum for the air door operations first and then check to make sure that the doors are working correctly in the dash...........
I'm sure you are talking about the passenger side. The heater core must be leaking. That is the only thing that will allow antifreeze into the cab. Check and make sure that the heater hose's that clamp to the heater core out under the hood is tight. If they are then replace the heater core.
no fuse check your anti-freeze level
That's an interesting problem i would test the coil, if that's not the problem i would check the wires for a short and high restance,
if it works intermittently, check the wiring/plug connections under the seat. If it never works, change the relay/ and or fuse. also check the plug behind the seat heater button on the door.
Check to make sure that the engine coolant is full. The thermostat must be working properly as well as the water pump. The hoses going to the heater core should be warm from the water if the climate control is working on the heat side.
more than likely the coolant level is low otherwise check that the thermostat is functioning properly. if neither of those seem to be the prolem than you possibly have a blocked or bad heater core
Check the blower motor resistor as it controls the fan speeds. Also check the blower motor as it will burn out resistors if its drawing to much amperage