Established in 2002, FibroPool designs and manufactures equipment and hardware for the swimming pool industry. We take pride in utilizing industry leading technologies to create some of the most energy-efficient and user friendly products on the market.

Pool Heaters Troubleshooting

Have you cleaned your filter lately? 
• Monitor your PSI reading on your filter’s pressure gauge. If the PSI is too high, clean your filter. 
• Increasing pressure goes hand in hand with the decrease of water flow. 

Is your pump basket dirty? 
• Check your pump’s strainer basket. Remove the basket and remove the debris with a hose. 
• Ensure the pump basket and lid are in good conditions. No cracks. 

Do you have too many water features operating at once? 
• Your pool pump only moves a certain number of GPMs, therefore, too many water features can dramatically decrease your water flow. 
• If possible, replace the motor with a larger one. 
• Close water features, or alternate them, until the pool heats to the desired temperature. 

Defective Pressure Sensor/switch  
• The purpose of the pressure switch is to ensure that water is flowing through the unit before it allows the heater to turn on. 
• The pool pump must be ON and your filter clean for the switch to close and allow voltage to pass through. 
• Test the voltage reading on the pressure switch with a multimeter. 
• Replace the pressure switch if necessary.

Are you using the low settings on your variable speed pump? 
• For operation, heaters require a minimum GPM flow. If you are running your variable speed pump on the low setting, make sure you meet the minimum GPMs for your heater. 

Is your pool water chemistry consistently and accurately balanced? 
• Poor water chemistry is one of the leading causes of equipment failure, especially pool heaters. 
• Test your water before adjusting your chemical levels. If unsure, please refer to the heater’s manual for the recommended chemical levels. 

Have you inspected the pressure sensor, thermal regulator, and/or the high limit switch? 
• Inspect these parts for corrosion, scaling, and/or any electrolysis issues. 
• If the pressure sensor, thermal regulator, or high limit switch is faulty, corroded, or defective - replace it. 

Have you cleaned your filter? 
• A dirty filter can cause low pressure and as a result, cause the heater’s pressure switch to turn OFF. A dirty filter can prevent a heater from firing and it can also cause your heater to shut off before warming the water to the desired temperature. 

When’s the last time you have inspected and cleaned the heat exchanger? 
• Deterioration of the heat exchanger can impact your heater’s operation. Inspect your heat exchanger for chemical or sanitizer damage.