Harness - Low Voltage ErP. PLEASE NOTE: This is compatible with boilers which have a serial number beginning ADH and ADP. If you have a boiler with a serial number beginning AAZ or ACH, you will require harness ICB318001.
GB24 SII ErP-Boilers with s/n beginning ADH or ADP
GB30 SII ErP-Boilers with s/n beginning ADH or ADP
GB30 SII ErP-Boilers with s/n beginning ADH or ADP
