Ford Kuga

 Service Manual

Auxiliary Climate Control » Auxiliary Climate Control (System Operation and Component Description)
Component Description

Electric Booster Heater

The electric booster heater consists of three individual heating elements, which are incorporated into a single housing. It is controlled by the generic electronic module (GEM), taking into account the following factors:

Detailed illustration of fuel-fired heater

Flame sensor

If the flame goes out independently during operation of the booster heater, a restart is carried out. If the booster heater does not ignite within 90 seconds of fuel delivery or if the flame goes out within 15 minutes of starting, a lockout will be implemented by the flame sensor.

Lockout can be cancelled by switching the booster heater off then on again, although this may only be repeated at most 2 times.

Overheat Sensor

The overheating sensor enables the fuel-fired booster heater module to determine the coolant temperature, protecting the heater from overheating. The overheating sensor is installed next to the coolant temperature sensor under a cover on the top of the fuel-fired heater.

In the event of overheating (lack of water, poorly ventilated coolant circuit), the fuel supply to the heater is interrupted and a lockout occurs. After the cause of the overheating has been eliminated, the heater can be restarted by switching it off and on again, if the coolant temperature is below 70C.

If the heater overheats ten times in a row, the control unit is locked.

ECT

The fuel-fired booster heater module uses the temperature sensor to determine the coolant temperature, which it then uses to set the starting and stopping time. The coolant temperature sensor is installed next to the overheating sensor under a cover on the top of the fuel-fired heater.

Water pump

The coolant pump is located on the holder for the fuel-fired heater on the bulkhead in the rear of the engine compartment. The coolant pump is driven by a built-in electric motor and circulates the coolant in the engine cooling system. The delivery rate for the pump is 820l/h at a delivery pressure of 0.1 bar.

Fuel pump

The fuel required for the fuel-fired heater is taken from the fuel system by a fuel pump fitted in the fuel tank and is delivered to the heater via a fuel line.

The fuel pump is an electric piston pump which meters the corresponding fuel volume for the fuel-fired heater according to a cycle set by the fuel-fired heater module.

System Diagram

System Operation

Component Description