I apologize upfront for the bathroom humor this topic may draw, but I am seriously beginning to think I have a bathroom water supply piping defect in my 2018 Classic 33FB. I have two primary symptoms that lead me to believe my shower and toilet are plumbed solely from the Alde hot water tank.
Symptom 1: No matter how I adjust the temperature valve on the Alde (note: I have read the forum posts and direction on loosening the screw to allow for adjustment) I cannot adjust the water temperature at the shower mixing valve. In other words, whatever temperature it is set for at the Alde temperature valve is the only temperature I get regardless of the position of the shower mixing valve. This results in unbearable nearly scalding temperatures if I engage shower boost.
Symptom 2: After a beer and bbq dinner party, I engaged shower boost for hot washing dishes. Several guests were using the macerator toilet. I heard laughter in the bathroom and a guest then called me in and demonstrated a flush that resulted in a steamy event similar to a mild geyser at Yellow Stone. There was clearly steaming hot water feeding the toilet. My guess is that we had not seen the hot geyser phenomenon prior to that time because the toilet had not been used multiple times in a short period so as to draw hot water all the way to the toilet. The hot water has not affected the function of the toilet, but I do not risk burns by flushing when seated.
Another note.....the bathroom sink, outdoor shower and kitchen sink faucets function normally providing hot to cold water as desired.
I can live with the hot geyser toilet (it is a good source of humorous conversation during parties), but the inability to adjust the temperature of water in the shower is inconvenient and literally a pain.
Your advice is appreciated.