My a/c will only work on 4 speed and not on 1-3, does anyone know what the problem may be?

 

Yes i had this exact problem. What it is is a blow motor resistor is blown out. This means taht the AC flow can't be held back and therefore only works on 4. I took it into the dealer and they fixed it for $120 and about 1.5 hours

 

Your resistor block is fried. It's about a $30 part from your local Nissan dealer. It's located in the HVAC ducts under the glove box. There is a connector on it with several wires coming off it. I think only one maybe 2 screws hold it in place.

Change that and fan speeds 1,2,3 will work once again.

P.S. If you buy the part it may be easier for you to see it under the dash when it's already in your hands.

 

Adding on to njmaxseltd

Do it yourself, it is held down by two screws.

1) Move the passenger seat all the way back so you have more room to look underneath.

2) You will see it behind the glove box, on the right side. The wiring harness will connect to this 'rectangular-shaped' part that's held in by two screws. Disconnect the wiring harness connector first (there's a release latch to unlock the connector), then undo the screws.

3) Install the new part in reverse order.

Even if you don't know what you're doing, it shouldn't take you more than 5 minutes.

 

Great, thanks a lot! I will do it next week

 

I just did this repair today. Cost $32.50. It took about 10 min. All you need is a phillips head screwdriver. It is located under the dash behind the glove box. The hardest part is getting into position to get at it. Simple repair.