First, What Kind of Heater Do You Have?
Most pools in Palm Bay and across Brevard County run a heat pump pool heater — it works like an air conditioner in reverse, pulling warmth out of the outside air. Gas heaters and electric resistance heaters exist too, but heat pumps dominate here because our air stays warm most of the year. The type matters because the failure points are different.
The Heater Runs but the Water Never Warms Up
With heat pumps, this is often an airflow or refrigerant issue — dirty evaporator coils, a struggling fan, or low refrigerant charge. It can also simply be undersized equipment fighting a cold snap: heat pumps lose output as the outside air temperature drops. If the unit heated fine last season and now can't keep up, it's worth a professional look rather than longer run times.
The Heater Won't Turn On at All
Check the simple things first: the breaker, the thermostat setting on the unit, and the pool pump. Most heaters refuse to fire unless the pump is running with enough water flow — a clogged filter or skimmer basket can drop flow below the pressure switch's threshold and the heater will sit there doing nothing, by design. If the pump is running, the filter is clean, and it still won't start, the problem is usually electrical or a failed sensor.
It Short-Cycles — On, Off, On, Off
Rapid cycling usually points to a flow problem, a failing pressure switch, or a refrigerant issue on heat pumps. Short-cycling is worth fixing promptly: every restart puts extra wear on the compressor, which is the most expensive component in the unit.
Ice or Heavy Condensation on the Unit
Heat pumps produce condensation in normal operation — a puddle under the unit on a humid day is usually fine. Actual ice on the coils is not. Icing points to airflow or refrigerant problems and the unit should be shut off and inspected before the compressor is damaged.
Why Refrigeration Experience Matters for Heat Pumps
A heat pump pool heater is a refrigeration circuit: compressor, coils, refrigerant, pressure controls. Diagnosing one properly takes the same skills as diagnosing an AC system, and Florida requires a licensed contractor for refrigerant work. CoolWave Air Conditioning & Refrigeration (FL license CAC1816907) services pool heaters alongside AC and commercial refrigeration across Brevard, Indian River & St. Lucie counties.
What You Can Do Before Calling
Clean the skimmer basket and filter, make sure the pump runs its normal schedule, confirm the heater's set temperature is above the current water temperature, and reset the breaker once. If it still won't heat after that, further poking around tends to do more harm than good — get it looked at.