The Tank › Water temp varies for several minutes when use starts › Reply To: Water temp varies for several minutes when use starts
In the pasts when I have encountered this condition similar to yours it has always been a bad faucet letting cold water into the hotside of the plumbing. If this is the case then all you need to do is turn off every cold water valve under every sink and then test for hot water. If everything is good then turn one cold water valve on at a time and retest. Wait a few minutes in between turning valves back on for things to get cold again. Once the line goes cold you found your bad faucet.