Originally Posted by bxclnt
My other answer seems more appropriate since I have discussed the matter with two Master plumbers and received the same answer. Thank you.
I'm not sure you can see the other answer, think you can, but anyway, I do believe since the furnace provides domestic hot water, the mixing valve is the problem. It will be interesting to see what happens when the new system - new natural gas boiler is installed.
The one other apt. Downstairs does not have heat provided as it has a wall system, and that apt. Also gets scalding water from the cold outlets only when I use my heating that is provided from the landlord's furnace. Thanks again. I'll rate.