Firstly what area do you live in. Have you a user manual or any instructions with the van.
You could visit the Caravan and Camping Club web site and go to their technical department and browse through the maintainance section and print of Fact Sheets to assist you in your quest.
Can anyone help I am looking for a handbook on the Abbey Oxford County 1993 and Instruction booklet for Carver cascade 2 -watt heater and fire with blown air. Could you please let me know where or how to purchase them.