DavidG1305
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Sorry to post yet another 'new boiler' question. Hoping someone can help.
As part of a loft conversion, we replaced the old boiler system.
The old was a 'traditional' open vented boiler system with a pump and a hot water tank, a salamander shower pump and a Bensham thermostatically controlled shower mixer. The new is a Worcester Bosch (WB) 28CDi RSF combi in the loft.
Since installation (by a plumber working for the building contractor) the heating has been fine, but the 'hot' water has been tepid. The plumber went through the trouble-shooting routine, said that a flow sensor was defective and called WB. Today the WB guy came, tested everything. He says the sensor is fine but that we had a 'cross'leak'. He thinks that the shower mixer is allowing cold water up the hot side and into the taps (which he tested by switching off the hot supply and getting a good flow of cold water out of the bath hot tap).
The local bathroom place says this is a good quality mixer suitable for mains pressure and disputes the diagnosis. Any thoughts please - just trying to make sure i'm not getting dicked around and looking forward to a hot shower again.
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