Turn the heat

The four levers from top to bottom are:

1. The windscreen air flow. Left is closed, right is open. (There's a little windshield symbol attempting to depict this.)

2. The air temperature. Left is no heat, right is maximum heat.

3. The footwell air flow. Left is open, right is closed. (There's a little arrow pointing down, implying air down there)

4. The rear ceiling air flow. Left is open, right is closed. Rear ceiling air is not heated. (Again, there's a little picture trying to convey this.)

The dash air flow is controlled directly on each dash vent. Up is closed, down is open. Dash air is NOT heated in '87 & older vans. Dash air can be heated (via the 2^nd lever) on '88 & newer vans. (Some late 87 vans had the dash heat.)

The door 'vents' are air exit vents that allow air to exit the van when opened. Forward is open, rearward position is closed. (This applies only to '87 & older vans. '88 & newer have air exits at the back end of the rear-side windows that are always open)

Colors are used in the vent symbols as follows: Blue is cold. Red is hot. White is variable from cold to hot. Thus the rear ceiling vent symbol is blue, depicting that only cold air is available there.

All of these air vent controls operate independently except that closing one air outlet will naturally cause more air to flow from the open vents.

Note that none of the levers control as an 'OR' function like: left for dash air -OR- right for foot air. They are all just simple open & close of one device only.

There are no 'recirculate' controls. If you want air flow, it must come in from outside the van. If you want NO air flow, just close each vent independently.