1. The cold water inlet dip tube may have fallen off at that moment after whichincoming cold water commingles quickly with the exiting hot water.
2. When the water is suspected of being warm, turn the dial up a little and then turn it back to where it was. If the heater kicks on and then stays on for more than ten minutes then the controller and thermostat assembly needs replacing.
2. When the water is suspected of being warm, turn the dial up a little and then turn it back to where it was. If the heater kicks on and then stays on for more than ten minutes then the controller and thermostat assembly needs replacing.