Air Con Trouble - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Catdu · 08-22-2005, 05:53 AM

first time posting so dont flame the newbie! i just recently got a 1992 240SX. I bought it as is and there's a problem with the air-con. The air con only turns on when its on #4. it gets really cold but anyone know the problem? could it be the wiring?

vik · 08-22-2005, 08:23 AM

you need a blower motor resistor

gfisch · 08-22-2005, 07:15 PM

You mean the blower, right? You have the same problem wherther it is the AC or heat?

Then, yeah, its probably that resistor chip thats on the blower (or at least it is attached to the blower on the s14, i would assume its in the same on an s13), because on full power it is bypassed and on lower powers it is used to drop the current to the motor.

projectRDM · 08-22-2005, 08:27 PM

S13 resistor is a 4prong unit mounted in the front of the evaporator case, right behind the glovebox.

Catdu · 08-26-2005, 06:18 AM

thanks for the help! i've contacted my nissan dealer and said it would cost $30+ and it should be coming in 2 weeks. any installation tips would be helpful! thanks again!

gfisch · 08-26-2005, 07:11 AM

I think you should be able to get access to it if you just remove the glove compartment.

projectRDM · 08-26-2005, 08:49 AM

Quote:

Originally Posted by Catdu

thanks for the help! i've contacted my nissan dealer and said it would cost $30+ and it should be coming in 2 weeks. any installation tips would be helpful! thanks again!

Ouch, I could have sold you one for $20. Still, nothing better than a brand new one, so for the price it's decent.

Catdu · 08-26-2005, 07:33 PM

Quote:

Originally Posted by R240NA

Ouch, I could have sold you one for $20. Still, nothing better than a brand new one, so for the price it's decent.

well i searched the net for one but couldnt find any. the price is alright since shipping to guam costs alot. but it would be nice if u can tell me where i can get one for a lesser value

.

PhoebusApollo · 11-02-2005, 12:24 AM

I have a similar problem, but I don't get any response from the blower even at setting #4. However, if I turn the knob to anything but off the engine does start to load up as if it expects to have to work harder to run the HVAC.

Even though I have no response from the blower motor at any setting would this still be the resistor?

Also, the AC button does the same, the engine idles faster, but the AC unit never actually comes on and the blower stays off.

projectRDM · 11-02-2005, 08:46 AM

Check the motor first. The signal to the compressor is not related to the blower motor, and the motor plug is easy to get to without removing anything. Check it for power and ground, if it's good then move on to the resistor.

08-22-2005, 05:53 AM	#1
Catdu Join Date: Jul 2005 Location: Guam Posts: 22 Trader Rating: (0) Feedback Score: 0 reviews	Air Con Trouble first time posting so dont flame the newbie! i just recently got a 1992 240SX. I bought it as is and there's a problem with the air-con. The air con only turns on when its on #4. it gets really cold but anyone know the problem? could it be the wiring?

08-22-2005, 07:15 PM	#3
gfisch Zilvia Junkie Join Date: May 2001 Location: Warren,NJ / Baltimore,MD Age: 44 Posts: 576 Trader Rating: (0) Feedback Score: 0 reviews	You mean the blower, right? You have the same problem wherther it is the AC or heat? Then, yeah, its probably that resistor chip thats on the blower (or at least it is attached to the blower on the s14, i would assume its in the same on an s13), because on full power it is bypassed and on lower powers it is used to drop the current to the motor. __________________ Greg Fischer [email protected] '97 240SX SE '98 Ford Explorer XLT

08-26-2005, 07:11 AM	#6
gfisch Zilvia Junkie Join Date: May 2001 Location: Warren,NJ / Baltimore,MD Age: 44 Posts: 576 Trader Rating: (0) Feedback Score: 0 reviews	I think you should be able to get access to it if you just remove the glove compartment. __________________ Greg Fischer [email protected] '97 240SX SE '98 Ford Explorer XLT

11-02-2005, 12:24 AM	#9
PhoebusApollo Leaky Injector Join Date: Mar 2003 Location: Baltimore Age: 45 Posts: 53 Trader Rating: (0) Feedback Score: 0 reviews	I have a similar problem, but I don't get any response from the blower even at setting #4. However, if I turn the knob to anything but off the engine does start to load up as if it expects to have to work harder to run the HVAC. Even though I have no response from the blower motor at any setting would this still be the resistor? Also, the AC button does the same, the engine idles faster, but the AC unit never actually comes on and the blower stays off. __________________ MMM, Dido.... 1997 240SX SE S15 SR20DET

11-02-2005, 08:46 AM	#10
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	Check the motor first. The signal to the compressor is not related to the blower motor, and the motor plug is easy to get to without removing anything. Check it for power and ground, if it's good then move on to the resistor. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

08-22-2005, 08:23 AM	#2
vik Leaky Injector Join Date: Apr 2005 Location: dallas Posts: 78 Trader Rating: (0) Feedback Score: 0 reviews	you need a blower motor resistor

08-22-2005, 08:27 PM	#4
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	S13 resistor is a 4prong unit mounted in the front of the evaporator case, right behind the glovebox. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

08-26-2005, 06:18 AM	#5
Catdu Join Date: Jul 2005 Location: Guam Posts: 22 Trader Rating: (0) Feedback Score: 0 reviews	thanks for the help! i've contacted my nissan dealer and said it would cost $30+ and it should be coming in 2 weeks. any installation tips would be helpful! thanks again!