Ventilation Switch?

[GHEN]

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__

[9FF]

Originally Posted by GHEN

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.

[GHEN]

Originally Posted by 9FF

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!

[9FF]

http://bit.ly/944-blower-Motor-cleaning-with-vinegar

[Jfrahm]

That or the rotary switch is falling apart.

[djnolan]

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.

[GHEN]

Originally Posted by djnolan

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