Warm water pulled out of warm air
The electric pool heaters we install and service are heat pumps aimed at water. A fan draws outdoor air across a coil, refrigerant soaks up the heat in that air, a compressor concentrates it, and a heat exchanger hands it to the pool water passing through. Nothing burns. The electricity runs the fan and the compressor, and the heat itself comes out of the air around the unit.
That makes it cheap to run on a mild day and slower on a cold one. When the air is warm and humid there is plenty of heat to harvest and the water climbs steadily. When a front pushes through and the wind picks up overnight, there is less heat in the air, output drops, and the pool sheds warmth off its surface faster than the unit can put it back. Owners notice it as a heater that seemed fine all fall and then could not hold the setting through one rough week.
That is normal behavior for the equipment. The fix is rarely a bigger heater.
The cover does more than the heater
Most of the heat a pool loses at night leaves through the surface, carried off by wind and evaporation. A cover stops most of that. On a cold, windy night a covered pool with a modest heater will usually finish the week warmer than an open pool with a larger one.
- Heater sized to pool volume and your swim months
- Its own circuit and breaker, planned from day one
- Placement with open air on every side
- Flow and pressure switches checked against the pump
- Scale and coil condition looked at on every visit
Equipment details are on our electric pool heater page, and finished jobs are in the gallery.
What gets settled before it ever heats
Size it to the pool and the calendar
Surface area and volume, how much shade the pool gets, whether there is a cover, and above all how many months you plan to swim. Someone who wants comfortable water from early spring through late fall needs more heater than someone who just wants the edges of summer stretched a few weeks. Both are reasonable goals, and they lead to different equipment.
A heat pump pool heater keeps warm water warm far better than it rescues cold water, which is why the cover counts as part of the system.
Run a circuit that fits
These heaters draw real current and need their own circuit with a breaker matched to the nameplate. That wiring belongs in the first conversation, because a new heater hung on a crowded panel or on wire that is too light is how breakers trip and terminals overheat. If the panel needs work, you hear about it up front.
Give it room to breathe
The unit pulls air in through its sides and pushes it out the top. Jammed against a wall, tucked under an overhang or boxed in by shrubs, it ends up breathing its own chilled exhaust and output falls off. Clearance gets planned before the pad is set.
Elsewhere on the Cypress Quarters list
- Heat pumps
The same equipment idea, heating and cooling the house.
- Refrigeration
Walk-in coolers, reach-ins and wine room units.
- Indoor air quality
Musty smells, filters and humidity inside the house.
- New construction HVAC
Equipment and ductwork planned at the framing stage.
More about the town is on the Cypress Quarters page, and the full coverage map sits under service areas.
Get a Straight PriceThat puddle is usually condensate
The coil in a heat pump pool heater runs colder than the air around it, and on a humid day it sweats the way a glass of ice water does. That moisture drips off the coil and out the bottom of the cabinet, sometimes enough to leave a real puddle on the slab. Owners see it and assume the heat exchanger is leaking pool water. Most of the time it is plain condensate, and all it means is the heater is working hard.
Telling the two apart takes no tools. Shut the heater off and leave the pool pump running for a few hours. If the dripping stops, it was condensate. Or dip one of your pool test strips in the water on the slab. Condensate shows no chlorine, and pool water will. If it reads like pool water, turn the heater off and call, because a leaking exchanger only gets worse with time.
The service calls we see most
Flow and pressure switch faults lead the list. The heater refuses to run unless enough water moves through it, so a dirty filter, a clogged pump basket, a half-closed valve or a pump set to a low speed can all show up as a heater error. Scale comes next, since hard water leaves mineral deposits on the exchanger and output fades. After that, fans that will not start, usually a capacitor or the motor.
Check these first
Clean the filter and the pump basket, make sure the valves are open, and look for leaves packed against the coil fins. If the error clears, you just saved yourself a service call. If it comes back, write down the code on the display before you phone.
The rating on the box assumes a warm afternoon
Heat pump pool heaters are rated under mild test conditions, so the number on the box describes a good day. On a cool night the same heater puts out noticeably less. Sizing that ignores this is how owners end up with a heater that is correct on paper and short in practice, right when they want warm water most. The better approach sizes against the coldest month you actually plan to use the pool, then asks whether a cover gets you there for less than the next size up.
How you run it matters as much. A heat pump heater is happiest holding a pool at temperature through the weeks you swim, letting the pump and heater top it up a little each day. Asking it to drag a cold pool up for one weekend of guests takes a long time and plenty of power, and it is the most common source of disappointment we hear about. Tell us how you plan to use the pool and the sizing follows from that.
When an older heater acts up, the same honest math applies as on any other equipment. A fan capacitor, a switch or a descaled exchanger can buy more seasons. A dead compressor in a cabinet that is rusting apart usually cannot. You see both paths with prices beside them and pick.
Who does the work
The person pricing the job owns the company, brings twenty years in the trade, and is the one who answers for the install afterward. Nobody earns a commission on a bigger unit. Heaters somebody else installed are welcome too, and the first visit says plainly whether the original sizing made sense.
Before booking, send the pool details: rough size, sun or shade, and whether it has a cover. Or just call and talk it through.
What pool owners ask before buying
If yours is not covered here, ring 561-339-5729. Somebody picks up day or night.
Will an electric heat pump heat my pool in January?
On most days, yes, if it is sized for that month and the pool is covered at night. On the coldest windy nights output drops and an uncovered pool loses ground. Sizing for the months you actually swim, plus a cover, is what makes winter swimming realistic.
Why does my pool heater show a flow error?
The heater shuts itself off when too little water moves through it. A dirty filter, a full pump basket, a closed valve or a pump running too slowly are the usual causes. Clean and check those first, and if the error stays, the switch itself may need testing.
Is the water under my heater a leak?
Usually it is condensate from the cold coil, which is normal on humid days. Turn the heater off for a few hours with the pump still running. If the dripping stops, it was condensate. Water that tests positive for chlorine points to a leak and needs a call.
Does a pool heater need its own breaker?
Yes. These units draw enough current to need their own circuit and a breaker matched to the nameplate. That wiring is planned as part of the install, so the heater never shares a circuit or overloads a panel that was already close to full.
Can you service a heater someone else installed?
Yes, and many of the heaters we look at were put in by somebody else. The first visit checks flow, wiring, airflow and scale, then you hear plainly what is worth fixing, what can be left alone, and whether the unit suits the pool at all.
Stretch the season on purpose
Tell us the pool size, sun or shade, and the months you want to swim. The sizing follows from that.
Send Brian the Job