Hi

I have a Rheem Electric hot water system, Model: 11102502
I turned the power off for 10 days since I was not at home
I have turned the power on last night. The display looks OK with the following stats:
Temp: 42*C
PRIORITY: Green LED on
Hot water Volume: 18l

PROBLEM:
When the hot water tap is turned on the display alternates between the following:
C2 & 11

Check that model #and get back to us, Rheem does not show that #