2002 Nissan Pathfinder air conditioner/heater problem!

I have a 2006 pathfinder and I find you have too turn it to max or hi it heats then
and then set it back to required setting

The 1997 Pathfinder does not have a Cabin Ait Filter. Not until 2001-2002 did Pathfinders come with CAFs. I have a 1998 Pathfinder and wasted 2 hours of my life I will never get back because some outfit on the Internet was listing a CAF for 96 and on Pathfinders they obviously had not done their research.

HERE'S A LINK TO THE BLOWER MOTOR,IT SAYS THE RESISTOR IS IN THE REAR OF THE HOUSING,2 SCREWS HOLD IT ON. Repair Guides Auxiliary Heating Air Conditioning Components Blower...HERE'S WHAT IT LOOK'S LIKE. Heater Blower Motor Resistor 2002 Nissan Datsun Pathfinder 2WD 6...

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.

your blower motor can getting shorted out or

Inside the container with the fluid !!!!!!

check your air filter first. If it hasn't been replaced before, it would prevent air flow and accurate metering to the MAF sensor.

Tune up? They went away in the 1980's.
Replacing of the plugs and air filter is about all that is needed.
Of course any shop will charge $100 for this with "added" features!

On a typical heater are several (4) in this case various size coils which look like springs.You have a break at those coils but not at # 4.

It's right next to the air filter in the intake hose.