This brand-new heater fan motor fits VOLVO FH12 and FH16 trucks with OEM codes 21639688, 20936382 and 3090905. It is a key part of the truck air conditioning and heating system, providing steady airflow for cab temperature adjustment. Adopting high-quality motor components, it runs smoothly with low noise, strong power and outstanding durability. Made to original OEM standards, it fits perfectly and is ideal for replacing faulty or worn heater motors.