I am NOT a plumber nor do I pretend to be one. So here it goes...my son was taking a shower in his bathroom and he called me in to say that when he puts the hot on there's barely any water but when you add more cold the pressure is full throttle coming out of the shower head.
I checked this myself today and he's right there was very little hot water coming out of the shower head even when it was all the way over to hot, but the more cold you added the higher the water pressure came out of the shower head.
Now, I remember seeing something like this on TV and I "believe" I remember seeing that they said it was something called a mixing valve is bad and needs replacement.
If this is true, should I just replace the whole shower fixture or just the mixing valve? The fixture is probably about 10-11 years old and its those contractor grand pieces of crap. Or is there something else I should look at doing?