If your pool heater is not heating in Melbourne, start with a few simple checks. Confirm the heater has power, the set point is above the pool temperature, and the pool pump is running. Many no-heat calls come from one of these basic issues.
Start With the Basics
Before you call for service, look at the easy things. A pool heater needs steady power, a working thermostat, and water moving through it. If one of those is missing, the unit may shut off or stay cold even when the equipment is fine.
- Power. Check the breaker and the disconnect near the heater. Look for a tripped switch. Do not open the electrical panel or the heater housing yourself.
- Thermostat. Make sure the set point is above the current water temperature. A setting that is too low will keep the heater off.
- Pump. The heater needs water flow. If the pump is off, on a timer that has ended, or running slowly, the heater may not start or may shut off for safety.
- Filter. A dirty pool filter slows water flow. Clean or backwash it, then check the pressure gauge and the flow again.
How Heat Pump Pool Heaters Work
Many pool heaters in Melbourne are heat pumps. A heat pump pulls warmth from the outside air and moves it into the pool water. That means airflow matters a lot. The fan and coil need clear space to pull in air and push it out.
Heat pumps work best on mild days and warm nights. On a cool, windy night, the unit may run longer and heat more slowly. That can be normal for a while. If the heater runs for a long time and the water never warms, it is time to look closer.
Check Airflow Around the Unit
Walk around the heater and look at the space around it. Leaves, grass clippings, pool debris, stacked chemical buckets and shrubs can block the air intake. Keep open space on the sides and top of the unit, and follow the clearance in the owner's manual.
Check the fan too. If it is not spinning, or if it sounds loud or rough, shut the system off at the disconnect and call for service. Do not poke at the fan or the coil with tools.
Read the Display and Error Codes
Many heaters show a code on the control panel. Write the code down before you reset anything. Codes often point to issues such as low water flow, a sensor problem, or a pressure fault. The owner's manual lists what each code means for your model.
A reset may clear a code once. A code that comes back is a sign the problem is still there. Repeated resets can hide a real fault. If the same code returns, stop and call for help.
Common Mistakes That Cause No Heat
Some problems look like a broken heater but are really simple mistakes. Knowing these can save you time and a service call. Watch for the issues below, because they show up often in coastal homes and busy backyards.
- Timer set wrong. Some pool systems run the pump on a timer. If the timer is set to short hours, the heater may never get enough time to warm the water.
- Chemicals stored too close. Chemical buckets, hoses and yard tools placed next to the unit can block airflow. They can also make it hard to reach the controls during service.
- Power switched off by mistake. A separate heater switch may be turned off after cleaning or storm prep. Check every switch before you assume the heater has failed.
Salt air, sand and humidity add wear to the outside of the unit. Rinse the cabinet gently with a garden hose now and then. Keep the area clean and dry, and avoid spraying water into the controls or electrical parts.
Storm season is another time to check the heater. Wind can blow debris into the fan. Heavy rain can leave water in the cabinet. After a storm, walk around the unit, clear any debris you can reach safely, and confirm the power switch is on.
Gas Smell Is an Emergency
Some pool heaters run on gas. If you smell gas near the unit, do not flip any switch and do not light anything. Leave the area right away. Call your gas provider and 911 from a safe place. Then call a technician once the area is safe.
When to Call a Technician
Call for service if you have checked the power, thermostat, pump, filter and airflow, and the heater still does not heat. Also call if you see a repeated error code, a burning smell, water leaking from the unit, or unusual noise.
CoolWave Air Conditioning & Refrigeration handles pool heater service for homes and businesses. We are based in Palm Bay and serve Melbourne, West Melbourne, Malabar and Grant-Valkaria. We also serve Vero Beach, Sebastian, Port St. Lucie and Fort Pierce. Read our pool heater service page to see what we handle. For local details, see our Melbourne area page.
Need help with a pool heater that will not heat? Call CoolWave at 888-922-8966 for an estimate. We offer 24-hour service, so you can reach out as soon as the problem starts.
Frequently Asked Questions
Why is my pool heater running but not heating the water?
Check the set point, the pump, and the filter first. Make sure water is flowing through the heater. Also check that the air around the unit is clear. If it still does not heat, call for service.
Should I reset my pool heater?
A reset may help once. If the same code comes back, the problem is still there. Write down the code and call for help when it repeats.
Can I fix a pool heater myself?
You can check the power, thermostat, pump, filter and airflow. Do not open the electrical panel or the heater housing yourself. Call a technician for repairs.
Do you handle pool heater service in Melbourne?
Yes. CoolWave serves Melbourne and nearby areas in Brevard, Indian River and St. Lucie counties. Call 888-922-8966 to talk with our team.