Temp is controlled by a blend door in the ducting in the passenger side. A small motor opens and closes the door to regulate heat in cab. The motor arm fits in a square hole in the door, the common problem is the square hole breaks out, and the door needs to be replaced.
In my 98 E350 6.8 it is under the dash. you have to pull the dash off to change it
The "Related Question" below is an extensive discussion on the 1999-2003 temperature control valve / heater control valve. It is likely the information will be similar to the 1997 / 1998 Windstar
I need a diagram on where is the low pressure valve on a 1999 expedition
The evaporation system control valve on a Ford E350 van is typically located near the fuel tank, often mounted on or near the canister that houses the evaporative emissions control components. Depending on the model year, it may be positioned along the vapor lines that connect the fuel tank to the canister. For precise location details, it's best to consult the vehicle's service manual or a repair guide specific to your model year.
glowe plugs on 1996 ford e350 .7.3 diesel are under valve cover
where is the heater control valve for a 1997 ford expedition
under the driver seat.
This is not a job you can do at home so where the valve is doesn't matter. Take it to a shop.
On a Ford E350, the heater control valve is typically located in the engine compartment, near the firewall. It's usually connected to the heater hoses that run from the engine to the heater core. You may need to remove the air intake duct or other components for easier access, depending on the specific engine configuration. Always consult the vehicle's service manual for precise location and replacement instructions.
230 deg. F.
its an expansion valve and it is located in the black box ( in the rear unit)
To change the heater valve on a Ford E350, first, ensure the engine is cool and disconnect the battery. Locate the heater valve, which is typically found near the firewall, and disconnect the hoses attached to it. Remove any mounting bolts or clips securing the valve, then replace it with the new valve, reattach the hoses, and secure everything in place. Finally, reconnect the battery and check for leaks before starting the engine.