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TROUBLESHOOTING
Residen al Hybrid Electric Heat Pump Water Heater Use and Care Guide • 23
PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
DRIP FROM TEMPERATURE &
PRESSURE RELIEF VALVE
(page 24)
1. Excessive water pressure
2. Add or service a thermal expansion
tank.
3. Non-functioning Temperature &
Pressure Relief Valve
4. Debris under valve seat.
1. Check water supply inlet pressure. If higher
than 80 PSIG, install a pressure reducing
valve (50-60 PSIG is the recommended pres-
sure.)
2. See “Water Pressure Increase Caused by Ther-
mal Expansion” section on page 7.
3. Replace the Temperature & PressureRelief
Valve
4. See “Drips from T&P Relief Valve Discharge
Pipe” section on page 24.
TROUBLESHOOTING CHART
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