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 Not Heating
Is the air blowing out of the top of the unit noticeably cooler than the surrounding air? (a 9°F to 12°F difference is typical)
If not, call AquaCal® for service at 800-878-0998.
Be sure all air coil surfaces are free from obstructions; low roof overhangs, landscaping, walls, fences, etc. The heat pump needs good airflow to operate at peak efficiency.
How long are you running your circulation pump each day? Cooler weather conditions, or heating to a higher temperature, may necessitate running the heat pump for a longer period of time. A pool blanket can be useful in permitting shorter run times, in turn leading to substantial energy cost savings.
What is the air temperature? Your heat pump may be in the defrost mode if air temperatures are below 50°F. The digital display will read “FS” if the unit is defrosting or air temperatures are too cold.