The faucets in my bath tubs are temp controlled.It is controlled to the point of taking cold showers.Can I adj

I bought this house new recently. I am told that it is code for the builder to put these in. Has anyone else experienced this? If so is there a way to adjust this or should I just put in new faucets? My sink faucets will put out really hot water according to what the hot water heater is set at. The faucets in the bath tubs will not get hot no matter what the hot water heater is set on. Any suggestions would be helpful! Thanks!