12V 5-8KW Diesel Heater Caravan Camper Van Air Motorhome Night Parking Hot Truck January 2, 2024 admin Comments are closed Working temperature of the heater: -40? +50? . 1 x Air Heater. 1 x Exhaust Pipe. With the air heater stopped working, press the “? ” button and keep pressing until the “HFR” appears on the screen. Continue reading