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Join Date: Jan 2004
Location: Gahanna, Ohio
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Ventilation Switch?

Hi all,

1987 NA 944. Looking at Clarkes Garage HVAC-01 there is a B/W photo labeled "HVAC system controls".

Switch #1 is labeled "Ventilation Switch".

2 questions:
  1. Is that the button with a small "arrow" shape on it?
  2. What does it do?

Additionally, my A/C and/or heater only blow when the fan switch (#3 on the aforementioned photo) is set at "4".

It won't blow at all on settings 1-3. Any thoughts?


As always thanks in advance!

GHEN__

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'87 944
Old 09-30-2019, 12:25 PM
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Quote:
Originally Posted by GHEN View Post
Hi all,

1987 NA 944. Looking at Clarkes Garage HVAC-01 there is a B/W photo labeled "HVAC system controls".

Switch #1 is labeled "Ventilation Switch".

2 questions:
  1. Is that the button with a small "arrow" shape on it?
  2. What does it do?

Additionally, my A/C and/or heater only blow when the fan switch (#3 on the aforementioned photo) is set at "4".

It won't blow at all on settings 1-3. Any thoughts?


As always thanks in advance!

GHEN__
Q2, it’s the blower resisters, they will need replacing or cleaning by soaking in vinegar, search there is a tutorial in here. They are attached to the blower motor assembly under the hood and they are easy to get to.
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Mike A
9TECHNIK | TRANSAXLE ÄRA
1986 944 (Street); 1986 944 (Track); 1986 951; 1989 951 (3.0L 8V); 2000 996 Cab.
Old 09-30-2019, 01:59 PM
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Quote:
Originally Posted by 9FF View Post
Q2, it’s the blower resisters, they will need replacing or cleaning by soaking in vinegar, search there is a tutorial in here. They are attached to the blower motor assembly under the hood and they are easy to get to.
Thanks Mike!
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'87 944
Old 09-30-2019, 05:43 PM
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http://bit.ly/944-blower-Motor-cleaning-with-vinegar
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Mike A
9TECHNIK | TRANSAXLE ÄRA
1986 944 (Street); 1986 944 (Track); 1986 951; 1989 951 (3.0L 8V); 2000 996 Cab.
Old 09-30-2019, 05:58 PM
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That or the rotary switch is falling apart.
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1987 928S4
1992 968 cabrio
1994 968 cabrio - Supercharged
Old 10-01-2019, 08:05 AM
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Your question about the ventilation switch. The one with the circular arrows opens and closes the flaps to admit outside air. Otherwise know as a recirculate switch.
Old 10-01-2019, 03:35 PM
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Quote:
Originally Posted by djnolan View Post
Your question about the ventilation switch. The one with the circular arrows opens and closes the flaps to admit outside air. Otherwise know as a recirculate switch.
Thanks! Do you happen to know the part number?

GHEN

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Last edited by GHEN; 10-02-2019 at 03:10 AM..
Old 10-02-2019, 02:33 AM
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