Common Problem
Pool Heater Not Heating? Common Causes and Next Steps
Heater issues generally fall into ignition problems (won't fire) and performance problems (fires but no heat). Both should be diagnosed by a qualified provider.
Most likely causes
- Low gas pressure
- Dirty flame sensor
- Scale on heat exchanger
- Bad thermistor or high-limit switch
What to do now
Verify filter pressure is normal and the pump is running. Then consider scheduling a heater diagnostic. Do not bypass safety switches.
FAQ
Ready to submit a pool repair request?
Serving Naples and surrounding communities.