AC fan speed dial help needed

[RobinFrench]

Fan dial only blows at max speed. No speed inbetween.

 

[KooLaid]

Contact member "BrianK". It's your CCU going funky. Cheap fix though.

Courtesy of Briank's website:

"Q: My unit is starting to go on and off, on lower fan position control knob. The closer I get to high maybe mid ways it will blow
out air. Is this the capacitors going bad or gone bad. It doesn't do it all the time. My unit still displays everything. Thanks and
how much do you charge for repairs.

A: The fan running only running on high or only at the highest or lowest setting temperature setting is one of the most
common problems with the NSX Climate Control Units. 95% of the time the problem is in the control unit and 5% its the power
transistor for the blower motor."

http://nsxe-repair.com/

http://www.nsxprime.com/forums/showthread.php?t=75087&highlight=CCU+repair

 

[OneRedNSX]

http://nsxe-repair.com/

Climate Control Unit FAQ's

Q: My unit is starting to go on and off, on lower fan position control knob. The closer I get to high maybe mid ways it will blow
out air. Is this the capacitors going bad or gone bad. It doesn't do it all the time. My unit still displays everything. Thanks and
how much do you charge for repairs.

A: The fan running only running on high or only at the highest or lowest setting temperature setting is one of the most
common problems with the NSX Climate Control Units. 95% of the time the problem is in the control unit and 5% its the power
transistor for the blower motor.


Q: I see your many posts (on NSXprime.com) concerning electronics for our cars, I seem to recall noting awhile ago that you
repair bad climate control boards? I have one which just a few days ago started the "only blow on High" problem. Would you
consider repairing mine?

A: I would be happy to get your CCU back in working order.


Q: Brian, I just picked up my 94 this last weekend. I noticed that the defrost was not coming out of the vents. The CCU seems
to be doing it's job, but the vent was not shifting under the dash. I looked under the RH side and noticed that one of the
motors was disconnected. Of course, I assumed that there was probably a problem with it, but I plugged it in anyway. It solved
the problem at first, but after I started the car the next time, the switching motor continued to click, click, click until I selected a
defrost setting and then it would stop. If I selected the center vent, it would shift just fine, but the clicking from the motor would
start back up again. Have you ever heard of this?

A: The motor could be bad or at least the feed back that tells it where it is. There could also be a problem with the CCU itself.
Run the test procedure and see what it reports. The procedure is in the FAQ's on NSXprime.com and let me know what you
get. http://www.nsxprime.com/FAQ/DIY/climate_control.htm


Q: I believe my climate control circuit board has gone bad. Both heating and cooling are not functional right now (comes on
once in a while for short duration). Do you currently have a good one to send to me and I'll remove mine and send it to you?

A: Sometimes the CCU's will start turning themselves on and off and when that starts happening it's time for a rebuild. I have
rebuilt control boards on hand that I sell on an exchange basis or I can fix yours it's up to you.