heat &a/c vacuum

Aaron Johnson said
yes i think they are.mine has 3 vacuum lines coming thru firewall,1 to vacuum cannister and it goes to engine and then
2 to heater water valve

Thats how my car is. The solid black hose is vacuum supply. And the black/red stripe and black/white stripe go to the valve. Currently my valve will open but it won't shut by itself. There isn't any vacuum supply to it.