You need to remove the dash panel. It will allow you to get access to many connectors and it will be easier to remove the harness.
your heater will be cold, or your engine can over heat. your car can take a long time to heat up. Your inside heater will be cool, or your engine temp. will over heat.
The heater core is located behind the dash inside the heater core box with two ports, an inlet and an outlet port protruding through the firewall into the engine compartment.
It is in the fire wall behind the heater box.
There isn't a block heater, unless the previous owner installed one.
ennngine heater is located at rear end of engine oil cooler on side of engine underneath the mainifold follow your engine oil heater plug in wires back to it and ; disconnect wire harness from heater. using correct wrench unscrew heater from oil cooler. install new heater, reattach wire harness PS . before you buy heater, check that harness is not bad heater and harness do not come togehter when u purchase but heater is about 46 bucks, harness is 78 bucks
Get a manual on your car and do the job correctly.
If you have a plugged AC condensation drain, clear water will back up and end up on the passenger floor. If the heater core is leaking engine coolant you will have engine coolant end up on the passenger floor.
Behind A/C and heater control panel, in center console.
It's part of the heater core assembly so it's behind your glove box
i JUST GOT A QUOTE FROM THE DEALER FOR A 2002 ECLIPSE SPYDER - REPLACE THE HEATER CORE = $950 PLUS TAX go to regular mechinic core is around 30. to a 100. dollars
Under the hood. Attached to the engine block
Remove and engine block expansion plug. Insert the block heater. Seal the block heater. Attached the wiring harness to the block heater.