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Hi, I'm laying electric underfloor heating on a new concrete floor with terracotta tiles on top. We have minimal head height, so having to go for 6mm insulation board. I see the board is supposed to be bonded with tile adhesive to the concrete floor. We really need every millimetre we can...

Hi all, Model: Baxi 105e (not instant) Symptom: when turning on hot water (CH turned off), I get hottish water, but also start to get CH. I notice that both the microswitches come on. If I select just CH, just the top one comes on. I've searched the forums, but there doesn't seem to be any...

Boiler = baxi 105e gas combi Shower unit = Bristan Cardinal thermostatic 'Good' mains water pressure (don't know what bar or anything like that I'm afraid). I just installed a thermostatic shower, and now all our hot water (from all taps) comes out warm, not hot! If I isolate either hot or...

Hi, I have a Worcester Heatslave 15/19 Combi Oil fired boiler. When either the central heating or hot water is triggered, the pump kicks in, then when the burner starts a noise starts which sounds a bit 'worn bearing'-like. Removing the burner box cover on the boiler makes the sound louder...

Hi, Worcester heatslave 15/19 oil-fired combi boiler. This morning the flue started giving out a little bit of black smoke. It wasn't much, but quite smelly. The boiler is still working, but I was wondering about cleaning out the burner. I've got the instructions for it, which says that the...

Hi all, Can't quite find my problem here, and I have searched, honest... First off, it's a Worcester 15/19 Oil fired combi. Problem: Hot water ON, CH ON. Hot water *very* hot. Rads cold. Switching the valve thing so that it holds on CH resolves the problem. This suggests that the valve...