I'm unsure how to use this feature I have read instructions but very vague. I assume I drive along with the tap open on heat exchanger this then heats up and then warms the heating system. But nothing really happens should I be doing something else ? There is a pump but if I have read instructions correctly that's to warm engine while van is stationery.
Thanks for anybtips hints or suggestionscin advance Paul
Thanks for anybtips hints or suggestionscin advance Paul