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Expert Pool Heater Repair & Troubleshooting Services
Fast, Reliable Heater Repairs When You Need Them Most
Nothing disrupts your pool enjoyment quite like a malfunctioning heater. Whether your heater won't ignite, isn't reaching temperature, or is making concerning noises, McCool's Pools has the expertise to diagnose and repair the problem quickly. With nearly two decades of experience servicing all major heater brands throughout the Phoenix area, our licensed technicians have seen—and solved—every type of heater issue imaginable. We understand that heater problems often occur at the worst possible times, which is why we prioritize responsive service and efficient repairs that get your pool back to comfortable temperatures as quickly as possible.
Common Pool Heater Problems We Repair
Ignition and Flame Issues
When your heater won't light or the flame keeps going out, the problem typically lies with the ignition system, gas supply, or flame sensor. We diagnose issues with pilot assemblies, electronic ignition systems, gas valves, and flame sensors. We test gas pressure to ensure adequate supply, clean or replace dirty flame sensors, and repair or replace faulty ignition components. Many ignition problems can be resolved quickly with proper diagnosis and the right replacement parts.
Temperature Control Problems
If your heater runs constantly without reaching the set temperature, cycles on and off repeatedly, or overshoots the desired temperature, you're dealing with a control system issue. We troubleshoot thermostats, high-limit switches, temperature sensors, and control boards to identify the root cause. Sometimes the fix is as simple as recalibrating a thermostat; other times, component replacement is necessary. Either way, we'll restore proper temperature control so your pool heats efficiently and accurately.
Heat Exchanger Deterioration
The heat exchanger is the heart of your pool heater, transferring heat from the burner to your pool water. Over time, especially in areas with hard water like Phoenix, heat exchangers can develop corrosion, scaling, or leaks. We inspect heat exchangers for signs of deterioration, test for combustion gas leaks into the water, and determine whether repair or replacement is the most cost-effective solution. Heat exchanger problems require prompt attention as they can affect both heater performance and safety.
Pressure and Flow Problems
Heaters require adequate water flow and pressure to operate safely and efficiently. If your heater won't stay lit or shuts down unexpectedly, pressure switches, flow sensors, or circulation issues may be to blame. We check for restricted water flow, verify pressure switch operation, clean or replace flow sensors, and ensure your pump is providing adequate circulation. These problems often develop gradually and can be prevented with regular maintenance.
Venting and Combustion Issues
Proper venting is critical for safe heater operation. Blocked or deteriorated venting can cause dangerous combustion problems and may prevent your heater from running. We inspect vent pipes for blockages, corrosion, or improper installation. We verify adequate combustion air supply and check for sooting or incomplete combustion. Venting problems must be corrected immediately to prevent carbon monoxide hazards and ensure efficient, safe operation.
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Signs Your Pool Heater Needs Professional Repair
Heater Won't Start or Ignite
If your heater doesn't respond when you turn it on, or it attempts to start but won't ignite, don't waste time with trial and error troubleshooting. This could indicate problems with the ignition system, gas supply, electrical connections, or control board. Our technicians have the diagnostic tools and experience to pinpoint the issue quickly, often resolving the problem in a single service call.
Inconsistent Heating or Temperature Fluctuations
A heater that can't maintain steady temperature, keeps cycling on and off, or takes much longer than usual to heat your pool isn't operating correctly. These symptoms often indicate failing sensors, control issues, or developing heat exchanger problems. Left unaddressed, these issues typically worsen and can lead to more expensive repairs or complete heater failure.
Strange Noises During Operation
Unusual sounds like rumbling, banging, whining, or whistling indicate serious problems that require immediate attention. Rumbling or banging often signals combustion issues or scaling in the heat exchanger. Whining or whistling may indicate pressure problems or failing components. These noises aren't just annoying—they're warning signs of potentially dangerous conditions that should never be ignored.
Visible Corrosion or Leaking
Water leaks around your heater or visible corrosion on the cabinet, connections, or heat exchanger need prompt professional evaluation. Small leaks can quickly worsen, and corrosion indicates either water chemistry problems or component deterioration. We assess the extent of damage and recommend appropriate repairs before minor issues become major expenses.
Error Codes or Warning Lights
Modern heaters display error codes when they detect problems. While some errors can be resolved by resetting the heater, many indicate genuine issues that require professional diagnosis and repair. We interpret error codes correctly, diagnose the underlying problem, and perform the necessary repairs to restore reliable operation.
Our Heater Repair Process
Comprehensive Diagnosis
Proper heater repair starts with accurate diagnosis. We don't guess or replace parts hoping to solve the problem. Our technicians systematically test ignition systems, gas pressure, water flow, electrical components, and control systems to identify exactly what's wrong. This methodical approach saves you money by ensuring we address the real problem, not just symptoms.
Clear Communication and Options
Once we've diagnosed the issue, we explain what we've found in terms you can understand. We outline your repair options, provide clear pricing, and help you make informed decisions. If your heater is old and experiencing multiple problems, we'll be honest about whether repair or replacement makes more financial sense. We never pressure you—we educate you and let you decide.
Quality Repairs with Proper Parts
We use manufacturer-specified parts or quality aftermarket equivalents that meet or exceed original specifications. We don't cut corners with cheap substitutes that will fail prematurely. Our goal is lasting repairs that restore reliable operation, not quick fixes that create callbacks. Most heater repairs are completed in a single visit, getting your pool back to comfortable temperature as quickly as possible.
Testing and Verification
After completing repairs, we thoroughly test your heater's operation. We verify proper ignition, confirm accurate temperature control, check for proper venting and combustion, and ensure all safety systems function correctly. We don't consider the job complete until we're confident your heater will operate reliably and safely.
Heater Brands We Service
Our technicians are experienced with all major pool heater manufacturers and models, including:
Gas Heaters
- Pentair Mastertemp: One of the most popular and reliable gas heater lines, known for efficiency and durability
- Jandy JXi: Advanced heaters with digital controls and excellent performance
- Hayward H-Series: Time-tested heaters with a reputation for longevity
- Raypak: Commercial-grade quality in residential sizes
- Teledyne Laars: High-efficiency heaters popular in larger installations
Heat Pumps
- Pentair UltraTemp: Energy-efficient heat pumps for year-round pool heating
- Jandy Pro Series: Reliable heat pump technology with digital controls
- Hayward HeatPro: Popular heat pump line with various efficiency ratings
- AquaCal: Premium heat pumps known for quiet operation and efficiency
Regardless of your heater's brand, age, or model, we have the expertise and access to parts needed for quality repairs.
Why Choose McCool's Pools for Heater Repair
Experienced, Licensed Technicians
Pool heater repair requires specialized knowledge of combustion systems, gas appliances, and pool equipment. Our technicians aren't just pool cleaners who dabble in repairs—they're trained professionals with nearly two decades of experience diagnosing and repairing pool heaters of all types. They understand the intricacies of different heater designs and stay current with evolving technology.
Honest, Transparent Service
We believe in straightforward communication and fair pricing. If your heater is old and facing expensive repairs, we'll have an honest conversation about whether replacement might be more economical. We provide detailed explanations of problems and clear pricing before beginning work. Our goal is long-term relationships with satisfied customers, not maximizing profit on a single service call.
Efficient Diagnosis and Repair
Years of experience have taught us to diagnose heater problems efficiently. We arrive prepared with common repair parts and can often complete repairs in a single visit. When special-order parts are needed, we expedite the process and return promptly to complete the repair. We respect your time and understand you want your heater working as soon as possible.
Comprehensive Warranty Coverage
We stand behind our work with comprehensive warranty coverage on repairs. We also assist with manufacturer warranty claims when applicable, handling the paperwork and coordination so you don't have to. This commitment to backing our work gives you confidence that repairs will last.
Preventive Maintenance Insights
While repairing your heater, we'll alert you to any other potential issues we notice and provide guidance on preventive maintenance that can help avoid future problems. Many heater repairs could be prevented with proper water chemistry and regular service—we help you understand how to protect your investment.
Get Your Pool Heater Working Again
Don't let heater problems keep you from enjoying your pool at the perfect temperature. McCool's Pools provides expert heater diagnosis and repair services throughout the Phoenix area, backed by nearly two decades of experience and a commitment to quality workmanship. Whether you're dealing with ignition issues, temperature control problems, or mysterious error codes, our licensed technicians have the knowledge and skills to identify and resolve the problem efficiently. Contact us today to schedule heater repair service and get back to comfortable pool temperatures quickly.
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(623) 323-9044
