Community Forums:

Hi!

I'm in the middle of a blower motor replacement. Things are going smoothly but I just encountered a problem that I'd like to solve before putting it all back together.

It's with the heater control module (recirc, defrost etc...).

There are only 4 vac lines going to it. Nothing at all is going to the side vacuum connection, which I assume would be the input.

Could someone tell me what should go where?

I have found the T connectors that go to the defrost, front feet, rear feet, and what I think is a vac line that goes to the recirculation (it goes above and behind the motor housing towards the firewall.

There is a vac line coming from the passenger side firewall, and it plugs into the vacuum reservoir on the right side. A line comes out of the vac reservoir on the left side, and that one goes to a T. From that T, one line goes to the valve that controls the right side rear foot well, and the other line goes to the control module foot air switch.

There is no line that goes to the left side rear foot well valve. That one is disconnected.

Also disconnected, as mentioned above, is the left "input" vacuum port on the heater control. Shouldn't the output from the reservoir go there instead of going to the T?

Perhaps someone did some funky work on those hoses in the past but they seem wrong.

I would really appreciate if someone could give me the low-down on how to connect this stuff starting from the vacuum reservoir output. My Bentley manual has no details on this.

Thanks!