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Hi, I have a Potterton Promax Combi HE Boiler and recently been experiencing problems with the hot water not being that hot, lukewarm at the best sometimes. I have found that if I run the hot water tap much slower it tends to be much hoter. Is this just due to cold weather outside? I have...

Hi, I was wondering if someone could possibly help out with the wiring of my new nest Thermostat I currently have a standard set up with a Promax Combi Boiler with its own timing clock etc built into the front, which connects to a budget thermostat...