Can't adjust the hot and/or cold water in the shower to get a consistent temperature. Have a solar edwards hot water boosted by a wood fired pot belly and run by a Davey pressure pump. When in the shower water goes cold so then we try to adjust with hot water and it suddenly goes really hot. You just have to "look" at the taps for it the be too hot or cold.
Have had 2 plumbers to check, cannt find a reason, told us to learn to live with it.
Had Davey pump checked and seems to be all good.
We have 2 bathrooms that it happens in and we have also changed the shower head in both rooms twice.
Help please this is driving us nuts.

First, tell us what brand / model faucet you have. Is it pressure balanced / temperature controlled faucet ? You can also snap a pic of it and post it here. Back to you. Milo