I have a 230V air-con unit in my boat, but the 12V coolant pump is on its own 12V switch and both need to be switched on seperately. If someone forgets to turn on the pump, I think the aircon unit could be damaged by running dry. How can I wire this so that turning on one system (eg the 12V pump switch) automatically turns on the other 230V circuit? I thought of using a relay, but I am not very electronically minded and would appreciate some advice with designing the circuit.
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2005 Beneteau Oceanis 423 Clipper
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