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Everyday Pool Heater Leaking Water Troubles We Handle

We have seen every way a pool heater can develop a leak. Here are the problems our clients contact us about most often.

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Water Dripping From Inlet or Outlet Fittings

Thermal expansion and contraction over multiple seasons can loosen threaded fittings at the inlet and outlet connections until they begin to drip. Left alone, the slow drip works its way into the cabinet and reaches the control board and gas components. We inspect, reseal, and tighten all external connections and test under operating pressure to confirm the repair holds.

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Pool Heater Pressure Relief Valve Dripping

A pressure relief valve that drips constantly has either reached the end of its service life or has debris in the seat preventing it from closing fully. Running a heater with a compromised relief valve is a safety concern because the valve can no longer respond correctly to pressure spikes. We test system pressure, replace the failed valve, and confirm the new valve seats properly under real operating conditions.

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Water Leaking Inside the Pool Heater Cabinet

Internal leaks are often caused by corroded heat exchanger tubing, worn bypass valve seals, or loose internal plumbing connections not visible from the outside. This type of leak tends to cause corrosion damage to surrounding components before it is discovered. We open the cabinet, trace the internal leak source systematically, and replace only the components that have failed.

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Corrosion Staining on the Pool Heater Cabinet

Brown or green staining on the outside of the heater cabinet usually indicates a slow internal leak that has been seeping through the unit for some time. By the time staining appears on the casing, the leak has typically been running long enough to cause corrosion on nearby components. We trace the internal source, assess the extent of the corrosion damage, and recommend the most cost-effective path to a lasting repair.

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Pool Heater Heat Exchanger Pinhole Leak

Aggressive pool water chemistry gradually dissolves the copper tubing inside the heat exchanger until a pinhole forms and water begins bypassing containment. This type of leak allows pool water and combustion gases to potentially mix, which is both a water quality concern and a safety issue. We perform a pressure test to confirm heat exchanger failure and provide a clear comparison of repair versus replacement costs.

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Pool Heater Bypass Valve Leaking

The bypass valve controls water flow around the heater when circulation is needed without heating. The valve stem seal can wear over time and begin to weep water at the valve body. Ignoring a bypass valve leak allows water to reach internal electrical components and causes progressive corrosion. We replace the valve or reseal the stem depending on the condition of the assembly.

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Pool Losing Water Faster Than Evaporation

If your pool water level drops faster than normal evaporation rates account for and there are no visible exterior leaks, the heater heat exchanger may be allowing water to escape through a breach in the tubing. This is a less obvious presentation of a heat exchanger leak that often goes undiagnosed for a full season. We use a pressure test to isolate the heater as the source and assess the extent of the exchanger damage.

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Pool Heater Leaking After Winter

Pool water left in the heat exchanger during winter expands as it freezes and can crack both the tube walls and the header casting. This damage often does not present until the first spring startup, when operating pressure makes the cracks active leaks. We assess the full extent of the freeze damage and determine whether a partial repair or full exchanger replacement is the right solution.

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Same Leak Keeps Coming Back

A leak that returns to the same spot after a previous repair usually means the repair was incomplete, the root cause was not fully addressed, or the surrounding material has degraded further since the original work. We run a fresh diagnostic, test the full exchanger under pressure, and determine whether a more comprehensive repair or a full exchanger replacement is the right answer to stop the recurring failure.

Reviews

What Our Customers Say

★★★★★

Found the leak fast, fixed same day

I noticed water pooling under my pool heater and called Winnipeg Service Pros the next morning. The technician arrived on time, found a cracked fitting at the inlet connection within the first ten minutes, and had it repaired before noon. He also tested the rest of the system and explained what to watch for going forward. Really solid service.

★★★★★

Diagnosed a heat exchanger issue I had no idea about

The technician from Winnipeg Service Pros opened up the cabinet and found corrosion on the heat exchanger that was already causing a slow internal leak. He showed me exactly what was happening and walked me through the repair versus replacement options without any pressure. We went with the repair and the heater has been running perfectly since. Very knowledgeable team.

★★★★☆

Great work, had to wait a day for the part

The technician identified the failed pressure relief valve quickly, but the exact replacement part had to be ordered in and arrived the next day. Not a big deal, and they came back first thing the following morning to finish the install. Repair came in at a fair price and the system has been leak-free since. Would use them again.

★★★★★

Thorough and honest diagnosis

I called expecting to hear I needed a new heater. The Winnipeg Service Pros tech showed up, did a full inspection, and told me the leak was just a loose outlet fitting that had worked itself apart over the season. He fixed it in under an hour and even tested the water chemistry before leaving. Appreciated the straightforward approach.

★★★★★

Professional from start to finish

The technician was professional and clearly experienced with pool heater systems. He traced the leak to a bypass valve seal that had worn out, explained what caused it, and replaced it cleanly. After the repair, he ran the heater through a full cycle to confirm everything was holding. No surprises on the bill either.

★★★★★

Saved my pool season

My heater started leaking right at the start of swimming season. Winnipeg Service Pros had someone out within a day, and the technician repaired a corroded inlet connection and replaced a dripping relief valve in one visit. The pool was back up to temperature by that evening. Really glad I called them when I did.

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