Gas heaters typically last 8 to 12 years. Heat pumps often last 10 to 15 years. Lifespan depends on how often the heater runs, water chemistry, and whether it receives annual service.
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817-779-8006
Pool Heater Repair
Your pool heater controls when you can use your pool and spa. When it fails, water stays cold or the unit will not run. We repair, service, and replace pool heaters across Dallas–Fort Worth. If your heater will not fire, hold temp, or run safely, you should stop using it and call a licensed technician.
Common Signs Your Pool Heater Needs Repair
Pool heaters rarely fail without warning. Most issues show up before the unit stops working.
You may need service if:
- The water feels colder than normal when you first enter.
- The heater will not turn on or shut off.
- The unit turns on, then shuts off again.
- The heater runs but never reaches the set temperature.
- You see water leaking near the heater.
- The unit fails to ignite at all.
If you notice any of these, continued use can cause more damage.
Pool Heater Maintenance and Lifespan
Regular service helps prevent breakdowns and early failure. Some tasks are safe for homeowners. Others are not.
Homeowner maintenance you can do:
- Keep leaves and dirt away from the heater.
- Clear debris under the unit if visible.
- Trim plants so air can flow around the heater.
- Keep rodents away from wiring and panels.
Professional maintenance includes:
- Checking gas valves and ignition parts.
- Testing temperature input and output.
- Inspecting electrical safety controls.
- Preparing the heater for freeze events.
Gas and electrical work should not be done by homeowners.
Pool Heater Installation and Replacement
Some heaters cannot be repaired at a fair cost. In those cases, replacement is the safer option.
Common heater types:
- Natural gas heaters
- Propane heaters
- Pool heat pumps (electric)
What we review before replacement:
- Pool size and water volume
- Distance from the gas meter
- Gas line size and pressure
- How often you heat the pool or spa
We install and service major brands, including Pentair, Hayward, Jandy, and RayPak
Why Hire a Licensed Pool Heater Technician
Pool heaters use gas, electricity, and water at the same time. Mistakes can cause fire risk, gas leaks, or equipment damage.
A licensed technician:
- Follows Texas safety rules
- Meets manufacturer repair standards
- Protects your equipment warranty
- Knows when a unit should be shut down
If you feel unsure working near gas or electrical parts, do not attempt repairs.
Recent heater work includes a leaking header found and repaired in Willow Bend, Plano, and a new Jandy unit installed alongside the filter and blower in Westridge, Weatherford. Out west we traced a gas supply fault in Monticello, Colleyville and descaled a heat exchanger at Harbor Lakes in Granbury, where hard water shortens their life.
More on heaters: common heater problems, electric versus gas, and how to make yours last longer.
Call for Pool Heater Service
Do not run a heater that will not fire or hold temperature. This can damage the unit and create safety risks.
Call WaterTex Pools to schedule pool heater repair or installation.
Same-day service may be available. One-year workmanship coverage included.
Pool Heater FAQs
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How long does a pool heater last?
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What size pool heater do I need?Heater size depends on pool volume, desired temperature rise, and how fast you want to heat the water. A 400,000 BTU gas heater works for most residential pools in the DFW area. Heat pumps are sized by BTU output and work best when matched to pool surface area. We measure your pool and calculate the correct size before recommending a unit.
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Should I choose a gas heater or heat pump?Both options work well in the DFW climate, but gas heaters are often the more practical choice. Gas heaters heat faster, cost less upfront, and are easier to service, while heat pumps can be installed but typically require an HVAC technician for internal repairs and maintenance.
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How much does pool heater installation cost?A full heater replacement typically runs $3,500 to $5,200 or more, depending on heater type, gas line distance, electrical requirements, and site access. Gas heater installations cost more if a new gas line is needed, and heat pump installations may require an electrical panel upgrade. Repairs start with our $150 service call, which covers diagnosis and the first hour of labour and goes toward the work. You get a written estimate after we inspect your equipment pad.
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Why is my pool heater not turning on?Check that the pump is running and the filter is clean first. Most heaters will not fire at all without proper water flow.
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Why is my heater running but not heating?This usually points to a fouled heat exchanger or a failed sensor. Scale from hard water is the most common cause in North Texas.
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How do I reset my pool heater?Switch the power off at the breaker for a minute, then switch it back on. If it faults again straight away, stop and have it looked at.
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What makes a pool heater fail?Scale build up, poor water flow, and rodents getting into the cabinet. Most failures trace back to something upstream of the heater itself.