DescriptionWhale Expanse (LIN) Extension AK1912 communication PCBThe Whale Expanse PCB Lin Extension (AK1912) is a replacement PCB compatible with Whale Expanse LIN water heaters regularly installed in caravans, motorhomes and van conversions.6 screws included.The Whale Expanse PCB Lin Extension (AK1912) is compatible with is compatible with following Whale Expanse water heater models;Whale Expanse Gas-Only Onboard LIN Set A: SETWL8201AWhale Expanse Gas-Only Onboard Lin Set A: SETWL8201DWhale Expanse Gas-Only Underfloor LIN Set A: SETWL8211AWhale Expanse Gas-Only Underfloor LIN Set D: SETWL8211DWhale Expanse Gas-Only Underfloor LIN Set E: SETWL8211EWhale Expanse Gas-Only Underfloor LIN Set F: SETWL8211FWhale Expanse Gas-Only Underfloor LIN Set G: SETWL8211GWhale Expanse Gas & Electric Onboard LIN Set A: SETWL8202AWhale Expanse Gas & Electric Onboard LIN: WL8202ORWhale Expanse Gas & Electric Underfloor LIN Set A: SETWL8212AWhale Expanse Gas & Electric Underfloor LIN Set D: SETWL8212DWhale Expanse Gas & Electric Underfloor LIN Set E: SETWL8212EWhale Expanse Gas & Electric Underfloor LIN Set E: SETWL8212FWhale Expanse Gas & Electric Underfloor LIN: WL8212URUsed byElddis Caravans & Motorhomes Bailey of BristolAuto-TrailSwift Group