Fuel Fired Booster Heater (G2257926): Overview

WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

Depending on model specification and market, the vehicle may incorporate auxiliary heating in the form of a Fuel Fired Booster Heater (FFBH). The FFBH boosts the temperature of the engine coolant supplied to the climate control assembly.

Fuel for the FFBH is taken from the vehicle fuel tank, through a fuel line attached to the fuel pump module. A FFBH fuel pump supplies the fuel at low pressure to the FFBH. In the FFBH, the fuel is burned and the resultant heat output is used to heat the engine coolant, which is circulated through the climate control assembly by a FFBH coolant pump.

FFBH operation is automatic while the engine is running. Where timed climate control is incorporated, the FFBH can be selected to operate (depending on the ambient air temperature) while the vehicle is parked using the Touch Screen (TS) or a remote control.

Vehicles with timed climate control also incorporate:

A FFBH receiver for communication with the remote control.
A changeover valve that allows the climate control coolant circuit to be isolated from the engine coolant circuit to reduce the warm up time of the passenger compartment.