Hot and Cold and Hot

[George K]

Our shower's been acting wonky for the last few weeks.

After an initial run of nice warm (very warm) water, after about 5 minutes, the water starts to cool down to almost room temperature. I would have thought it's a water heater problem, but turning the controls to the more "hot" setting restores the nice hot temperature, although the handle is now at a "warmer" setting than it was before.

The shower stall shares a wall with the bathtub, so I imagine the feed from the hot water heater is shared. When I run the water in the tub, there's no problem.

Any ideas?

[Jolly]

My guess?

Mixing valve.

[George K]

Yeah. Mine too. Just wanted some other opinions.

[LuFins Dad]

Menopause?