no hot water in tub in unused bathroom?
I have a large house 4 bathrooms one bathroom no one ever uses the tub. Well I had a lot of company and this bathroom was used and no hot water in the tub what can cause this the sink had hot water? I also have 2 hot water heaters and one of them has some corrosion on the top what I think is a vent pipe. I don't know how to tell if it is working
or not. The bath hadn't been used in 13 years but I still don't understand why no hot water. What can I do to fix problem?