Why does the RAV adapter included in the accessories not fit? Y. Beenen Updated February 02, 2024 16:15 Follow If you use the larger RAV adapter, the small black pin may need to be placed on the valve to compensate for the length. Related articles The radiator actuator shows E1 in the display, what to do? Is it possible to register the DuoFern radiator actuator in advance and install it at a later date? Radiator actuator - do I get an info when the battery is almost empty? What are triggers?