Hi there,
We have an ASHP fitted about 2 years ago and for the past year(ish) we have had problems with the water coming out tepid at best for some outlets but others have no problems at all. So en-suite shower has never had a problem but the taps are v temperamental. Other shower v temperamental but the taps are usually fine. All very frustrating in a house with multiple taps/showers but we can only use one shower and sometimes hunting around the taps to find hot water! All taps have mixers on them and most are less than 8 years old. Please help!