Noritz Water Heater Model No. N-063S-1 periodically does not supply hot water
(Theodore, AL, USA)
The Noritz Water Heater Model No. N-063S-1 periodically will not supply hot water to the faucet. I have to leave the faucet running and pull the Pressure Relief Valve 2 or 3 times and the unit kicks on and supplies hot water. This has been occurring for 3 months and it happens about twice a month. The unit is 4 years old. Please advise if you know what causes this malfunction.