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Vent Door Not Working

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.

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CEBirnley
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CEBirnley

Vent Door Not Working

Post by CEBirnley » Thu May 07, 2020 11:40 am

1998 V70
When the switch is selected to blow air out of the upper vents only, it still allows air to come out from the vents below the dash. Please advise as to what I need to search on the forum or advise on possible issues and the fix.

Thank you.
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BEJinFbk
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Re: Vent Door Not Working

Post by BEJinFbk » Thu May 07, 2020 12:44 pm

Dumb question - Are the vent roller wheels on each dash vent open?
'98 V70 R - Well Equipped for Life Up North... ;)

scot850
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scot850

Re: Vent Door Not Working

Post by scot850 » Thu May 07, 2020 1:36 pm

Question is why does it NOT ONLY blow up onto the windshield. Why does air still blow onto the floor? Which setting have you got the heating knob set to? Is it the one in the picture you attached?

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

CEBirnley
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Joined: Wed Aug 09, 2017 2:29 pm
Year and Model: 1998 V70 Base FWD
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CEBirnley

Re: Vent Door Not Working

Post by CEBirnley » Thu May 07, 2020 2:14 pm

FBK - trust me, no dumb questions. Yes, the vents are open.

Neil - I have the temperature knob sent to cool/cold. There is no air blowing onto the windshield. Yes, the attached picture shows the selector knob pointing toward the setting where air only comes out of the vents (not those pointing on the windshield, but those pointing on the passenger(s).

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BEJinFbk
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BEJinFbk

Re: Vent Door Not Working

Post by BEJinFbk » Thu May 07, 2020 6:41 pm

Should be the dash vents only, IIRC.
Probably a bad flap actuator/linkage/flapper
or it isn’t getting the correct command from
the ECC.

How does it do with the other air output directions?
Do both temp dials/flappers get results?
How about the recirc function?

If all of the other actuators/ flaps respond,
then your ECC is probably OK. Then you
can dig into the specific actuator/flap for
output diversion between floor,dash and
windshield.
'98 V70 R - Well Equipped for Life Up North... ;)

CEBirnley
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CEBirnley

Re: Vent Door Not Working

Post by CEBirnley » Fri May 08, 2020 12:09 pm

FBK

Everything else seems to be working, so I am thinking you are right about looking for issues with the flapper that diverts air to the vents blowing on passengers. thank you so much for the insight. I will be sure to reply with an update.

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BEJinFbk
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BEJinFbk

Re: Vent Door Not Working

Post by BEJinFbk » Fri May 08, 2020 1:22 pm

There are images and walk throughs about
all of the actuators around here someplace...
At work right now, but I’ll look this weekend.
'98 V70 R - Well Equipped for Life Up North... ;)

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