Electric Water Heater Bugs

Discussion in 'Tankless Water Heater Forum' started by RLB01, Mar 25, 2020.

  1. RLB01

    RLB01 New Member

    Jul 23, 2019
    i installed a Rheem Rtex18 electric on demand hot water heater. works fine with sink, but when we installed the tub the heater errors out when we turn the tub faucet on. the only diff in plumbing is the tub has a Watt mixing valve and the sink does not. dont see why that would matter. the error is "E5" dont know what that means. online resources say that error means combustion chamber or venting is dirty, but this is electric. HELP!!!
  2. fitter30

    fitter30 Active Member

    Feb 2, 2020
    Retired service tech
    Peace valley missouri
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