Heat Pump Not Running

• Is the display lit? If not, ensure the main breaker (located at the power supply panel) and the disconnect switch (located near the heat pump) are both turned ON.
• Does the display read “Flo”? If so , check to be sure that the ciruclation pump is operating and the filter is clean. There may also be a valve positioned incorrectly, allowing water to by-pass the heat pump; be sure water is flowing through the heat pump.
• Does the display read “OFF”? If so, the desired water temperature is set below 60°F. Raise the desired water temperature above the actual water temperature and the unit should start after a 3 to 4 minute delay.

>> Heat Pump Running but Not Heating | Troubleshooting Guide