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No A/C after dashboard work - '97 ECC

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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RedBrickCollector
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Year and Model: 1997 850 T-5 Wagon
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No A/C after dashboard work - '97 ECC

Post by RedBrickCollector »

Had some dashoard work done and immediately after, I had no compressor engagement. Fan works fine, blinking light stops after a little while.

I've checked and double checked the harnesses of the ECC unit itself, can't see any unplugged harnesses but I very well could have missed something. Any ideas what it could be or what to check?
'97 950 T-5 Wagon
'89 and '95 Daihatsu Feroza

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misha
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Year and Model: '97 850 2.5 20v
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Post by misha »

Exactly what kind of work was performed on dashboard?
Blinking ac/rec lights informs you that there is a fault stored in ECC module.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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jreed
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Year and Model: '97 Volvo 855 GLT
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Post by jreed »

There is a little blue relay next to the power stage... shown near the center of the photo below -- that would be worth checking to make sure it's seated correctly and working OK.
Ac relay volvo 850 ECC.jpg
Ac relay volvo 850 ECC.jpg (85.66 KiB) Viewed 77 times
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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