| Hey Thomas,
All heaters have a T & P ,(temperature and pressure) valve installed on them.
I asked," Do you have a backflow preventer or a check valve installed on your water service? Is your water hotter then usual?" Please answer.
We have determined it's the heater relief valve and not the AC haven't we? No, your heater isn't about to go bad. As long as any heater holds water and doesn't leak it's worth repairing cost wise. If it is the heater you need one of two things. A new T & P valve or a expansion tank installed on the cold water supply. Regards, Tom |