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Cabin Temp Sensor location 99 S70

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

dang5001
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Cabin Temp Sensor location 99 S70

Post by dang5001 » Thu Feb 28, 2008 12:42 pm

99 S70 AWD
Can anyone tell me where the Service A/C ECC Cabin Temp Sensor is located. Also, would I need a 2-pin or 4-pin connector?

Thanks



VCA
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Post by VCA » Thu Feb 28, 2008 1:05 pm

You see that grille next to your switches on the right-hand side of the steering wheel (to the left of the ECC unit?) It's behind there. To get to it, remove the radio, pop out the ECC module, pop out the switch next to that grille. Then put your hand through the opening for the ECC module, press the catches with your fingers and pull out to remove. There's a harness connector attached. Reverse those instructions to install. The sensor is part number 3524841 and runs about $100.


2008 S80 T6 AWD
1999 S70 GLT

Responsible for the care of a '92 960 and an '07 S60R

MadeInJapan
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Post by MadeInJapan » Thu Feb 28, 2008 3:10 pm

Like VCA insinuated, it is Volvo specific, but before you go replacing it, these sensors are prone to get crud in them (lint and the like). Try taking some compressed air and blowing it out if it's giving you problems. Btw, what is going on that you think you might need to replace it? Btw, it is fairly rare that these go bad. If you really need a replacement, try a junk yard first. I'd personally hate to pay $100 for one.


'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

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Post by dang5001 » Fri Feb 29, 2008 4:48 am

The lights are blinking on the Off/Recirc buttons. My freon was low, so I recharged the AC thinking that may th problem, but the lights stayed on. I called Volvo and they said that the cooling system sets a code when the lights flash and they had to scan it to find out what the problem was. I explained to the service guy that everything (ie blower, temp., etc.) was working correctly, but the lights were flashing. The service guy said that from his experience that usually meant the cabin temp sensor was going bad. So, I thought I would try and locate it clean it like you suggested. If the lights continue to blink after I blow it out, I guess I'll take it to the dealership and let them scan it for a code.

Also, is it true only Volvo can diagnose the AC problems from the blinking lights or is there another way? From researching this problem, I understand that there scan doesn't always indicate the right problem.

Thanks for the advise.



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Post by BEJinFbk » Fri Feb 29, 2008 12:29 pm

I've gotten the blinkies several times since I got my '98.
A short blast from a can of compresed air got it everytime!

The sensor has a very small fan that draws air in from
the cabin for a more accurate reading. With all that air
flowing past the sensor, it just collects bits of gunk.
You're probably just fine. 8)
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'98 V70 R - Well Equipped for Life Up North... ;)

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Post by dang5001 » Fri Feb 29, 2008 12:37 pm

Thanks.

I'll blow it out tonite and see what happens. If that doesn't work, I'll take it out and clean it like MIJ suggested.

I'll let you know how it works.



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Post by dang5001 » Sat Mar 01, 2008 1:12 pm

I blew it out and it works fine now.
Thanks



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Post by MadeInJapan » Sat Mar 01, 2008 2:29 pm

Nice to see another satisfied customer! :mrgreen:


'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

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