Repairing a pool heater ensures you enjoy warm water during your swim season. Costs vary based on heater type, size, and issues. Here's a detailed breakdown:  
Average Repair Costs by Pool Heater Type 
| Heater Type | Repair Cost Range |
|-----------------|-----------------------|
| Electric        | $200–$1,200          |
| Natural Gas     | $150–$750            |
| Solar           | $50–$400             |  
Factors That Affect Costs
- Heater Type: Electric heaters cost more due to complex mechanisms, while solar systems are simpler and cheaper to fix.  
- Pool Size: Larger heaters with higher BTUs incur more expenses for repairs and maintenance.  
- Pool Type: Saltwater pool heaters can cost up to 50% more to repair than chlorine pool heaters.  
| Pool Type  | Repair Costs      |
|----------------|-----------------------|
| Saltwater      | $500–$1,500          |
| Chlorine       | $165–$790            |  
- Labor: Professional repairs average $80–$120 per hour.  
- Replacement Parts: Parts range from $20 to $600, depending on the issue.  
Common Repairs by Heater Type 
Electric Heaters
- Capacitor Replacement: $20–$75  
- Water Pressure Switch: $20–$50  
- Refrigerant Issues: Requires professional servicing.  
Natural Gas Heaters
- Flame Sensor Replacement: $20–$200  
- Gas Valve Replacement: $175–$600  
- Pressure Switch Replacement: $40–$60  
Solar Heaters
- Pump Replacement: $200–$500  
- Check Valve: $20–$30  
- Repair Kit for Panels: $50–$60  
Pool Heater Size and Costs
| Pool Surface Area | Heater Size (BTUs) | Cost Range |
|-----------------------|-----------------------|----------------|
| Up to 300 sq. ft.     | 50,000–106,000       | $1,300–$2,500  |
| 301–500 sq. ft.       | 106,001–250,000      | $1,700–$3,500  |
| 501–800 sq. ft.       | 250,001–400,000      | $2,000–$4,000  |
| 801–1,200 sq. ft.     | 400,001+             | $4,001+        |  
Repair vs. Replacement
- Repair Costs: $50–$1,500 (depending on the type and part).  
- Replacement Costs: Average $2,800 (higher for larger or solar systems).  
Heater Lifespans
- Gas Heaters: ~5 years  
- Electric Heaters: 5–10 years  
- Solar Heaters: 20–25 years  
Rule of Thumb: If repair costs exceed 50% of the replacement price, consider replacing the unit.  
DIY vs. Hiring a Pro 
| Heater Type | DIY Repair Costs |
|-----------------|----------------------|
| Solar           | $50–$400            |
| Gas             | $150–$750           |
| Electric        | $200–$500           |  
- DIY: Suitable for minor issues like cleaning collectors or replacing small parts.  
- Professional Repair: Necessary for refrigerant or gas line issues, costing $80–$120/hour.  
Tips to Save on Pool Heater Repairs
- Regular Maintenance: Annual servicing costs $100–$200 but prevents major breakdowns.  
- Troubleshoot First: Check filters, valves, and electrical connections before calling a pro.  
- Use Solar Covers: Improve efficiency for ~$120–$250.  
- Invest in Quality Parts: Prevent frequent replacements.  
Proper upkeep of your pool heater ensures a longer lifespan and fewer repair headaches.
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