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XC70 Climate Control Temperature Sensor - Replace or Repair?

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by abscate » Fri Jul 28, 2017 4:49 am

1999-2000 are the "bastards"

2001- is P2

A late calendar year 2000 build will be a P2
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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by Ms242245V70 » Wed Sep 04, 2019 10:50 am

I soldered the thermister wires at the tips and my thermister is now working. Ordered a new one from Mouser anyway. 2001 v70 t5

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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by DavidGP » Sat Oct 19, 2019 3:14 pm

Im trying to solve a similar issue....when I opened my CCM I found the resistor just split in two...isnt it supposed to have an actual resistance between the two wires?
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Screenshot_20191019-171420.jpg
Resistor

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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by abscate » Sun Oct 20, 2019 6:43 am

That is a very high value resistor.

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I don’t know if you can use a junkyard CCM but I would certainly try
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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by DavidGP » Sun Oct 20, 2019 7:10 am

Actually dug around the forums for a good hour and found out that people replaced/fixed this issue by getting a NTC Thermistor with similar values to fix the issue. Going to give it a shot this week, only 10$...

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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by firstv70volvo » Sun Oct 20, 2019 9:21 am

CCM notes and photos, includes thermistor replacement.

https://app.box.com/s/8m779rkh2pdglnxtcv69nsyhmnm8x1dt

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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by DavidGP » Sun Oct 20, 2019 9:37 am

Thanks :-) I already took everything appart though but that guide would have been usefull while doing it. Not that hard of a job but I guess Ill clean out the little fan while Im in there. Got my part on amazon, was 10$ for 100 NTC glass thermistors while a 10k value so technically should also work with plenty of spares...lol

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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by cn90 » Sat Feb 08, 2020 1:05 pm

My 2005 XC90 2.5T with 120K miles ...

In the process of cleaning the little vent (where the cabin sensor is located as in the video below), I damage the sensor. So far no issues with heat etc.

What do I need to do?
- Leave it alone?
- Is the sensor that crucial?
- Is the sensor available somewhere?

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2005 XC90 2.5T 110K+

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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by oragex » Sat Feb 08, 2020 2:56 pm

Broken thermistor will cause things like no rear windshield defrost, no heated seats, fluctuating or incorrect cabin heat - at least in auto mode, perhaps some more. The faster way is a walk to the junkyard, and undoing the black plastic piece that is housing the thermistor. I believe you can also get the sensor aftermarket (try to google the specs, perhaps 10kohm but needs other specs as well) however not sure how accurate or sensitive a cheap chinese one would be, so perhaps need to go with a good brand. The small fan behind the CCM will also be quite clogged. I made another video with more details accessing the thermistor


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Re: XC70 Climate Control Temperature Sensor - Replace or Repair?

Post by cn90 » Thu Feb 13, 2020 6:13 pm

Thanks,

There is an ebay seller selling the Thermistor for Volvo HVAC panel.
Already bought it.
Will install in my 2005 XC90 this weekend and report back.

PS: The radio for XC90 is one BIG piece, so it is a bit different than S60 HVAC panel, but the idea is the same...
2004 V70 2.5T 100K+
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