Oh no, HVAC issues...
08-18-2014, 04:11 PM
#48
Instructor
Join Date: Jul 2004
Location: The Netherlands
Posts: 234
Likes: 0
Received 0 Likes
on
0 Posts
The CCU fan runs constantly at ignition on, and up to 20 minutes after ignition off. There is no connection between this fan and the others in the car other than the above.
On all (not the very latest) 964 models, the minimum main blower fan speed is "1", even if the dial is set at 0.
Cheers,
Tore
On all (not the very latest) 964 models, the minimum main blower fan speed is "1", even if the dial is set at 0.
Cheers,
Tore
Last edited by Henriks 964; 08-18-2014 at 04:11 PM. Reason: typo
02-20-2016, 01:39 PM
#49
Rennlist Member
05-22-2017, 04:56 PM
#50
Instructor
The mixing chamber temperature sensor is a NTC for sure, not a thermocouple sensor. However, I am unsure of the NTC value, I expect it to be a normal 12,5kOhm type based on the car schematics information (12,5k @20 degC) and on the other sensors used in the HVAC system.
Cheers,
Tore
Cheers,
Tore
Did anyone find out it it is indeed a NTC, and what value?
I found this one:
B57164K0103J000
2904
B25/100 =4300K, R25 =10000Ω, TR =25°C, ∆RR/RR =±5%
@20dgr. Celcius:
Rnom[Ω] 12683ohm
Rmin[Ω] 11949
Rmax[Ω] 13418
https://www.conrad.nl/nl/epcos-b5716...ks-500622.html
That might do the trick?
Seems silly buying a new sensor for approx. € 160,- while it really is only a € 0,50 component that failed?
05-22-2017, 08:29 PM
#51
Rennlist Member
I'd say that's the one. I have a spare HVAC harness with sensors, and I got correct ohms as per the spec. info from your link for the 4300K (0 deg C/ 35K ohm and ambient 27 Deg C/ 9.2K )
05-23-2017, 02:52 AM
#52
Rennlist Member
The sensor is indeed an 10k NTC, the above mentioned type will be fine.
You could choose a "water drop"-type sensor instead of the disc type. This is smaller and might have a faster temperature response. It could be easier to place into the plastic tube too. Soldering in a new sensor is done in a few minutes.
Cheers,
Tore
You could choose a "water drop"-type sensor instead of the disc type. This is smaller and might have a faster temperature response. It could be easier to place into the plastic tube too. Soldering in a new sensor is done in a few minutes.
Cheers,
Tore