Pool Heater Repair in Lake Havasu City, AZ

Heater faults sort into five groups: no fire, fires and quits, runs but stays cold, leaks, or damaging the pool. Each group has its own short list of causes. Most of them get checked in the first fifteen minutes.

The checklist starts outside the heater. System switch on, thermostat above the water temperature. Pump running with enough flow to close the pressure switch. Gas valve open, and on propane, fuel in the tank. Plumbing valves open and any heater bypass set right. Half of no-fire calls in Havasu end there. The usual culprit is a filter so loaded after a dust storm that the pressure switch never closes, and cleaning the filter fixes the heater.

If flow is fine, the fault moves inside. A failed igniter, a flame sensor fouled by dust, a gas valve that will not open, or a control board. Clicking or sparking without ignition is a job for a technician, not a reset button.

A heater that fires, runs a few minutes and quits before the water warms has a flow problem or a scale problem. Low flow lets the exchanger overheat and trips the high-limit switch. The causes are a dirty filter, a partly closed valve, a bypass out of adjustment, or reversed water connections. Scale inside the exchanger does the same thing from the inside, because the water cannot carry the heat away fast enough. In Havasu that scale is calcium carbonate. It forms fastest on the hottest surface in the system, which is the exchanger tube. The error code on the display tells us which safety tripped. The water chemistry tells us why.

Older heaters with a standing pilot have their own list. A pilot that will not light points at low gas pressure, poor air supply or bad venting. One that needs relighting every week often has a sprinkler aimed at the heater, or roof runoff dripping into it. Units against a wall or in a windy spot may need a high-wind stack. Electronic ignition heaters replace the pilot with a spark or a hot surface igniter. Those igniters are a wear item we carry. The burner chamber runs near 1,100 degrees, so spider webs and dust in the tray change the flame.

Water under a heater has three sources. A heat exchanger pinholed by low pH, or by chemicals fed upstream of the heater, is the expensive one. That leak shows up at every start. A leak only while the burner is lit is usually condensation. Heating very cold water, a missing bypass, or too much flow from an oversized pump all cause it, and the fix is plumbing, not a new exchanger. Winter freeze damage shows up at spring start-up. It is rare here, but not unheard of after a hard January night. Header gaskets and drain plugs are the cheap third source.

Black on top of a heater or dark exhaust means low gas pressure or starved air and venting. Both need correcting before the heater runs again. A warped or buckled jacket points the same way, plus downdraft. Copper-colored stains appearing in the pool after a heater problem mean the exchanger is corroding. The usual causes are low pH or a chlorinator plumbed before the heater instead of after it. Chemicals go in after every piece of equipment, and the heater is the piece that pays when they do not.

A heat pump moves heat from the air into the water. On a 45-degree January morning in Havasu it has little to move, so it runs long. That is not a fault. Compressor trips, fan motors, refrigerant leaks and flow switches are. Solar heaters fail at the valves and the controller more than at the panels. A diverter stuck in bypass, a sensor reading wrong, or an air leak at a roof fitting. We repair both. When a heat pump cannot keep up with a Havasu winter spa, the conversation turns to gas, on our pool heater installation page.

Most heater repairs in Havasu could have been a service call in September. A pre-season pool heater service clears the burner tray and venturi of dust and nests, checks the igniter and flame sensor, tests the pressure switch, confirms gas pressure and venting, and looks at the exchanger inlet for scale. It also catches the loaded filter that would have kept the heater from firing on the first cold night. For spa owners who heat from October to April, that one visit is the cheapest heater work of the year.

Calcium is the first reason. Water heats as it passes through the exchanger. Calcium gets less soluble as water warms, and the exchanger surface runs hotter than the water. So scale forms there first and thickest. A scaled exchanger costs more to run, trips its safeties, and eventually corrodes. Keeping calcium hardness in range and the saturation index balanced is heater maintenance. That is why our weekly pool service tests for it.

Idle time is the second. Most Havasu heaters run October through April and sit the rest of the year. Dust settles in the burner tray, insects move into the venturi and the vent, and gaskets dry out. The third is sun on the cabinet, which cooks control boards and wiring insulation. The fourth is spa duty. An attached spa asks a heater for a 30-degree rise in an hour. Havasu heaters run hard when they run at all.

The exchanger decides most of it. On a gas heater, the exchanger is the heart and the most expensive part. If it is scaled but sound, we descale it. If it is pinholed on a heater under ten years old, a new exchanger can make sense. On a fifteen-year-old unit with a corroded exchanger and a discontinued board, a new heater is the honest answer. That is on our pool heater installation page. Igniters, sensors, pressure switches, gas valves and boards are repairs at any age as long as parts exist.

Sizing matters too, and so does the bypass. Many heaters run with too much or too little water through the exchanger, because the external bypass was never set or an oversized pump overruns it. Too much flow erodes the tubes and causes condensation. Too little trips the safeties. Setting it is part of every repair.

The heat a pool needs is gallons times 8.33 times the temperature rise in degrees, in BTUs. Evaporation is about half of all heat loss. One inch of evaporation from a pool takes about 15 degrees of heat with it. A heater that cannot keep up may be fine and simply fighting an uncovered pool in January. A cover is the cheapest heater repair there is, and the Department of Energy says the same.

The same JM Pool Service tech who runs the weekly route and installs heaters. One insured person who knows the Raypak pressure switch that sticks, the Pentair sensor that drifts, and which Jandy board fails first in the sun. Because the tech sees the pad every week, a heater that short-cycles in October got its filter cleaned in September. If a part has life in it, you hear that. If the exchanger is done, you hear that with both numbers, repair and replace. Spa-side heater trouble is also on our spa repair page. The rest of the pad is on our pool repairs page.

Gas is not a place to guess. A heater that has been under water does not get restarted. A heater that smells of gas gets the manual valve closed before anything else. Propane is heavier than air and pools in the cabinet when it fails to light. A sudden ignition of that pool is how heaters hurt people. We follow the manufacturer’s procedure every time.

Our pool heater repair covers Lake Havasu City and about fifteen miles around it. That means the Island District, Downtown, Southside, Southgate, Acoma, Kiowa-Amberwood, Vista Del Sol, Village Parc, the Medical District, the Refuge, North Pointe and out toward the Foothills. If you searched “pool heater repair near me” from anywhere in Havasu, this is the route. The full list is on our pool service area page.

Heater repair is one part of our pool repairs work. Pool heater service through the winter comes from the same truck. So does pool pump repair when flow is the fault, and pool filter cleaning when a loaded filter is why the heater will not fire.