Principle Of Operation - Ford Transit Owner's Handbook Manual

• Switch the programmable fuel
fired heater on for approximately
10 minutes at least once a month,
all year round. This prevents the
water pump and heater motor
from seizing.
• To avoid corrosion, make sure the
coolant in your vehicle contains at
least 10 % antifreeze all year
round.
• Make sure the coolant level is
between the MAX and MIN
marks on the reservoir to prevent
air locks. See Engine coolant
check (page 137).
• Programmable blower operation
begins when the coolant reaches
a certain temperature. In this
mode, ambient temperature has
no effect.
• In continuous heater operation,
the unit senses the ambient
temperature. If this is above 5°C
(41°F) the programmable fuel fired
heater heater will not activate.
The programmable fuel fired heater
operates independently of the vehicle
heater by heating the engine s
coolant circuit. It is fed from the
vehicle fuel tank. It may also be used
while the vehicle is in motion to help
the vehicle heater warm up the
interior more quickly.
It is possible that when the
programmable fuel fired heater is
activated, exhaust fumes may come
from under the sides of the vehicle.
This is normal.
Climate control

Principle of operation

Before operation
will reduce battery life or even flatten
the battery.
Before activating or programming the
heater, prepare the following
settings:
•
•
•
•
70
CAUTION
Turning the blower switch to a
position other than position one
Set the vehicle heater
temperature control to maximum.
Turn the blower switch to position
one.
Switch on the recirculated air
before turning the ignition off. Wait
at least five seconds for the
ventilation system to close the
outside air vents.
Open all the cabin air vents.