Volvo S60 XC70 XC90 Cabin Temp sensor Testing and Cleaning 2001-2009

As in the title, I show where this small sensor is located, the small fan behind, how to clean it and how to test it with a multimeter. When this small sensor goes bad, it can cause problems with cabin heating/cooling, and also with some Climate Module buttons such as the heated seats, rear window defrost, etc However, before replacing it, test with a multimeter to make sure it's indeed the actual problem. Otherwise, the CCM software may have been corrupted (usually after a battery drain or when the car battery is replaced without having the key in POS II). See comments section for more information

[@scottm5425]

thanks for telling us the fan runs for ten minutes as I thought it was faulty and going to drain my battery!

[@jupitersjunk4718]

I replaced the thermister that I purchased from you. That did not solve the problem I’m having. I still do not have AC on drivers side. And the temperature is stuck on the hottest temp on drivers side. Also the vent in stuck on feet.

[@Peppermint1]

I'm not the Ebay seller, only posted the link. Do you happen to measure the old thermistor ? If the sensor was working fine, it is possible the problem is corrupted CCM software. A Volvo owner who had similar issues, eplaced the CCM with a used one - he was lucky to find one with the same software/year see last post on this page www.matthewsvolvosite.com/forums/viewtopic.php?f=9&t=17478&start=10

[@eleanorbeasley8109]

How do change ambient temp gauge from celcius to temperaure?

[@zmanvideo1]

thank you for posting this, can you use compressed air in a can to clean the sensor?

[@Peppermint1]

I would say the problem with blowing instead of sucking air, it that all debris will fly into the small fan behind and may stuck it even more. Reason why I recommend a vacuum cleaner

[@zmanvideo1]

@@Peppermint1 ok, thank you, I will use a vacuum cleaner,

[@Peppermint1]

CCM disassembly th-cam.com/video/Zis5WN_if60/w-d-xo.html
An Ebay seller has what appears to be a sensor replacement (haven't tried myself). But before replacing your sensor, test it with a multimeter to be sure it's indeed the problem www.ebay.com/itm/2003-2014-VOLVO-XC90-S80-S60-XC70-V70-HVAC-Thermistor-8651244-30782330/274266146616?epid=1217840281&hash=item3fdb894738:g:5fMAAOSwP45eRd7k#rwid
It is possible sometimes rather the CCM software gets corrupted. If you can find a used one from the same year and with the same software, it should work plug & play - see the last comment in this forum discussion www.matthewsvolvosite.com/forums/viewtopic.php?f=9&t=17478&start=10

[@artoohafling6512]

is the sensor soldered to the ccm board or does it plug into some pins? i think you solved my heated seats issue.

[@Peppermint1]

See the two wires, are soldered to the board - just remember which goes where