Temperature Pressure Relief Valve

Hi,

The Temperature Pressure Relief Valve on my 9 year old AO Smith water heater has started to drip. It only does this when we use our central air. Any ideas on why or what I should do about it? I am planning on replacing the valve tomorrow, but find it curious that it only leaks when the air is in. The water heater is about 4 feet from the furnace, which is what circulates the air. It's a forced hot air system. Any help will be appreciated.

Thanks,

tj

maybe the air is pressuring in some way while, if this is the case, possible debris contained in the valve will start the leaking. In a case like this it may help to open and close the valve a few times in order to try to get rid of the debris.

Thanks, it turns out it was the water heater expansion tank. It had blown and wasn't regulating the pressure correctly. After replacing it, it turned out the Temperature Pressure Relief Valve wouldn't reseat and it was replaced also. Turns out the AC thing was just bad timing!

Thanks again,

tj