Heating and ventilation system - description
The heater is of the type which utilises waste heat from the engine coolant. The coolant is pumped through the matrix in the heater casing where air, force-fed by a duplex radial fan, disperses the heat into the vehicle interior.
Fresh air enters the heater or the ventilator ducts through the grille at the rear of the bonnet lid. Air is extracted from the interior of the vehicle through outlets at the rear edges of the doors.
There are differences between the heater used on Base models and other versions in the Escort range. On Base models, a twospeed fan switch is used instead of the threeposition switch used on other versions. On all models except the Base version, central and side window vents are incorporated in the facia panel.
The heater/ventilator controls are of lever type or rotary type on later models, operating through cables to flap valves which deflect the air flowing through the heater both to vary the temperature and to distribute the air between the footwell and demister outlets.
See also:
Fluid leak check (Every 6000 miles (10 000 km) or 6 months)
1 Visually inspect the engine joint faces,
gaskets and seals for any signs of water or oil
leaks. Pay particular attention to the areas
around the rocker cover, cylinder head, oil
filter and sump ...
Throttle housing - removal and refitting
Note: During manufacture the throttle plate is
adjusted so that it is fractionally open, to avoid
the possibility of it jamming shut, and it must
not be repositioned. Idle speed adjustment is
prov ...
Diagram 3: 1980-86 Ancilliary circuits all models
Diagram 3: 1980-86 Ancilliary circuits all models ...