Rheem Hybrid Water Heater Changing Modes
I recently had a 50-gal Rheem Hybrid water heater installed. This is the model currently sold at the orange big box store. I also have a PV system with an eGauge, so I can see real time energy use. I run the water heater in “heat pump” mode for maximum efficiency. The water heater occasionally goes into a “pre-warm” mode, which kicks in about 5KW of resistance heat, even though the water heater is supposedly in “heat pump” mode. Does anyone know why it does this?
On the Status screen, it says “pre-warm” status. The “pre-warm” 5KW kicks in for about 15-20 minutes then it turns off. Sometimes it does it after a shower, but I have also seen it happen in the middle of a steady state operation with no hot water being used.
I’d like to understand what is going on and to not have it do this, as I am OK with longer recovery times in order to save energy. Thanks for any insights!
Water heater installed in garage. Located in Seattle, WA.
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