Why does my heater “cycle” on and off?
- Inadequate water flow caused by a dirty filter or closed valves.
- External bypass needs adjusting.
- Reversed water connections.
- Water pressure switch is out of adjustment.
- It is also possible that the thermostat is out of calibration.
Why doesn’t my heater reach my desired temperature?
- The thermostat may be set too low.
- Inadequate gas supply.
- Malfunctioning thermostat.
- You are losing heat faster then you are adding it. (If the heat loss in the pool is greater than the heat input, the heater might be too small or you may need a thermal barrier). Use a thermal barrier to help prevent heat loss
Why would my heater be leaking?
- The heat exchanger may be leaking because,
(1) Chemical imbalance.
(2) Sanitizer damage.
(3) Winter freeze damage.
(4) Failed joints. - Regardless of the reason, a service company must be contacted to inspect the failed exchanger. Contact Preferred Pools and Spas for examination.





