It says that when using a combi boiler you have hot water on demand and that it takes precedence over CH.
However, when the room thermostat clicks in the CH, the pump starts to circulate the CH water but does not immediately fire up the boiler - consequently the water in the heat exchanger cools down. If you now turn on the hot tap, the boiler will fire up, but the water from the tap remains at the same temperature as that in the exchanger i.e. cool or, if you catch it at the wrong moment, cold.
Should it do this?
Thanks for any advice.
However, when the room thermostat clicks in the CH, the pump starts to circulate the CH water but does not immediately fire up the boiler - consequently the water in the heat exchanger cools down. If you now turn on the hot tap, the boiler will fire up, but the water from the tap remains at the same temperature as that in the exchanger i.e. cool or, if you catch it at the wrong moment, cold.
Should it do this?
Thanks for any advice.
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