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Baxi direct hot water only when TWO faucets are running?
I have a Baxi Luna DuoTec 40GA. Here's what I've discovered: When I run the kitchen tap alone, there's no call for hot water. Nothing registers on the boiler. It's as if I haven't turned on the water. But if i run the kitchen tap AND the bathroom tap simultaneously, boiler fires right up and runs hot water to both no problem. Similarly, running only the shower [head] will not trigger a call for HW. But the shower head AND a faucet will immediately fire up the boiler and produce HW continuously. Running the bathtub spout alone is enough (volume?) to trigger the DHW. Any theories? It seems clear that the system now needs a minimum to fire up.