Heater fan know not working - keeps blowing
#1
Heater fan know not working - keeps blowing
The fan speed knob is not working. Turning does not change fan speed (keeps blowing full blast), pushing off button only turns display off but fan keeps blowing at full tilt.
Any suggestions?
1991 NSX
Any suggestions?
1991 NSX
#3
Video of HVAC blowing, even when pushing 'off' or using fan speed button.
https://www.dropbox.com/s/38cwf6ebiy...45544.mp4?dl=0
https://www.dropbox.com/s/38cwf6ebiy...45544.mp4?dl=0
#4
#5
#6
Senior Moderator
@KraftwerkTurbo , this is a classic symptom of the climate control board going bad because of old solder. Contact Brian K at Acura NSX electronics repair to get it repaired.
PS, welcome to AZ!
PS, welcome to AZ!
#7
@KraftwerkTurbo , this is a classic symptom of the climate control board going bad because of old solder.
Blower HI relay NOT stuck.
ONLY pulling the Power Transistor turn fan off.
Previous owner had cut the old transistor but left in housing. zip tied new transistor in. Appears transistor housing touching metal (here: alu coolant/ac pipes?) creates a short.
Removed old transistor (what a PITA that is; could not get heater hose off, rear screws is a killer). Put new transistor (ouch! $$$) in. Running now.
Have 'brother' car (this one manual, other is auto) with similar issues. Will first test relay and transistor. Then will contact above mentioned Brian for quote; seems he is resident NSX climate control guru?
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#8
Senior Moderator
Brian is the man. Even better, he charges reasonable prices. Glad the transistor change worked!
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