top of page
Sunset Sailboats

Pool Heat Pump Troubleshooting 


Ensure the set temperature is higher than the current water temperature. (see owners manuals for more details)

 Check breaker or disconnect out by the heat pump to make sure it is in the "ON" position.
Check to make sure the breaker in main panel that feeds power to the disconnect or sub panel out by the pool equipment is in the "ON" position.

Running Not Heating 


Unit is running but it is not heating enough -
How many hours per day is the unit operating? Remember that the heat pump only operates while the pool pump is running. In cooler outdoor temperatures set the time clock to permit 12-24 hour per day operation. After the desired temperature is reached, return the unit to normal operation of 10-12 hours per day to maintain your temperature.



Check that there is water flow to the unit. Most units will have a light indicator with "flow" or "flow error" or the display panel will read "flow".
  If the heater reads "flow" check the following:

  • Check the pool pump is running.

  • Check that the pool pump filter is clean.

  • Check the valves to the heat pump are open.

  • Check that bypass valves (if fitted) are correctly set.



Unit is running and there is lots of water. Air source pool heat pumps can condensate between 3-5 gallons per hour.  A leak in the pool heat pump will present it's self if its running or off. 

  • Shut off pool heat pump

  • Run filter pump only for 10 hours

  • Check back to see if pad is dry

If all of the points above are checked and the Heat Pump is still not working, then call for service at



When calling for a service call please provide the following information:

  Make & Model
  Serial Number (if readable)
  Approximate date of install

bottom of page