High temperature switch limit exceeded 194ºF
- Try reset. If F00 repeats, create a demand for hot water. (DANGER: Take caution to prevent scald injury.) If water is above 194oF, test upper and lower temperature sensor with an ohmmeter. (Refer to resistance chart, this section.) Replace bad sensor. If water is below 194ºF, test high temperature switch and wiring with ohmmeter. Switch should be closed at this point. If not, replace switch.
- If unit reset successfully, let the appliance run and go into the status menu to check the upper and lower temperature sensor. If either display reading does not make sense, check appropriate sensor with ohmmeter. (Refer to resistance chart, this section.) Replace bad sensor. Do an OHMs reading on both sensors to check continuity.
