Jan 2013. Yes very experienced. Multiple issues. Bad thermostat. Burned contacts on timer.
Let's break it down.
1) Water heater tripped:
29th the electric water heater reset button was tripped because ECO detected high heat from very-hot-water, or nearby burned wire, or loose wire, or bad thermostat.http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
2) Description of water heater:
40 gallon Rudd (Rheem), 2 thermostats and 2 elements indicates ordinary 240Volt water heater.
More information shows on label on side of tank, including valtage rating (208-240), and element wattage (usually 4500 watts).
Rheem-Ruud serial number, 3rd and 4th digit are year of manufacture.
3) Solution for water heater:
Tripping ECO reset button, Very hot water, and sometimes not-so-very-hot ... sounds like bad thermostat, and/or bad element. Replace both thermostats, and see if problem persists. Then replace elements if needed.
4) Information about timer:
Water heater circuit has 40 amp T103-Timer, which is plenty heavy for ordinary 240Volt household water heater that draws 19-22 amps.
T103 timer has repair parts, and can usually be repaired unless overheated contacts caused melting, but that can also be worked around in some circumstances, or the internal mechanism replaced by buying T103M mechanism-only and snapping into existing box.http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timers.html
5) Solution for timer:
Attach photo of inside of T103 timer, and I can assess what steps will most likely fix the timer.
Maybe the timer is not connected to water heater.
If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7