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Posted by jim on January 09, 2004 at 11:47:03:
In Reply to: Re: Pressure remains too high posted by John on January 09, 2004 at 10:05:13:
: Here is another question: I turned off the fresh water supply to the system. The heat worked however the relief valve let out water because the pressure was over 25psi. I then let water out of the system to get the pressure down to 15 psi. But it keeps creeping back up to over 25 psi. What on earth is going on here?
Look at your expansion tank. It could be water logged and not allowing for expansion when the water heats up.