2002pathfinder fan control amplifer blows out after working 15 minutes

Possible fan relay

might be just a fuse,or take it to a dealer

Does the fan work at all? If it does work but only on one speed, then the resistor block is shot and needs replacing. If the fan does not run at all, then one of three things may be wrong, the fuse, the control, or the blower motor........and the fuse should be in the interior fuse box.

I'm fairly sure that model still uses a vac control for the hvac. You may have a vac leak in one of the lines, the main controller, or one of the blend doors. The blend doors are under the dash and may be difficult to reach.

For the screeching noise you need to replace the blower motor and for the blower motor speed you need to replace the blower motor resistor.

i need to find my blower resister in a 2003 pathfinder

Your heater blower fan unit is in need of replacement.
It's a difficult job so take it to a service center.

The problem is that they have a resistor in between the wiring and the blower motor. it is usually located under the dash near the blower housing. It is a small square type gadget. It is a little hard to get at. But it can be done. If it's not under the dash it is in the wiring on the under the hood. But mostly it's on the cab under the dash.Just replace it.Good luck.

need heater blower resister that controls blower speed.

It is the resistor located between the blowermotor and the wiring . Usually located under the dash on the blower housing or in between the radiator and the blower motor. In the wiring. It is a small gadget. Not a resistor as in TV resistor. It controls the speed of the blower fan. Replace that. If it does not work replace the blower motor. But I am fairly confidemt that could be the problem.