Should You Replace a Leaking Pool Heater This Fall or Wait Until Spring?

As the pool season comes to an end, many homeowners start thinking about closing their pools and waiting until next spring to deal with pool heater problems.

But what happens when an older pool heater is already leaking because of a cracked heat exchanger?

On October 1, 2026, AirPro Heating & Cooling replaced two aging Raypak pool heaters in Oakville, Ontario. Both heaters had cracked heat exchangers and were actively leaking water.

With the swimming season coming to an end, both homeowners faced a similar question:

Should the leaking pool heater be replaced this fall, or is it better to wait until spring?

There is no single answer for every situation. The right decision depends on the age and overall condition of the heater, the extent of the damage, repair costs, parts availability, and how soon the heater will be needed again.

Two Aging Raypak Pool Heaters With Cracked Heat Exchangers

The two service calls were separate jobs, but the problems were very similar.

Both existing Raypak pool heaters had cracked heat exchangers and active water leaks.

The heat exchanger is one of the most important components inside a gas pool heater. It transfers heat to the pool water while keeping the combustion process separated from the water system.

When a heat exchanger develops a crack, water can leak from the heater. Depending on the location and extent of the damage, there may also be visible corrosion, rust, water staining, or other signs of deterioration around the heater.

A proper inspection is important to determine where the water is coming from and whether the existing heater is still a practical candidate for repair.

For an older pool heater, a major component failure also raises other questions.

Is the heater otherwise in good condition?

Are replacement parts still available?

How much would the repair cost?

Are other components showing signs of wear or corrosion?

These factors can make the decision between repair and replacement more complicated.

Job 1: Raypak Pool Heater With Water Leakage

The first service call involved an aging Raypak pool heater with a cracked heat exchanger and active water leakage.

The photos below document the condition of the existing Raypak heater, including the water leakage and corrosion around the failed heat exchanger, followed by the new Rheem installation.

Before — Aging Raypak Pool Heater

Leak & Corrosion — Cracked Heat Exchanger and Water Leakage

After — New Rheem P-M266A-EN-C

Job 2: Another Aging Raypak Heater With a Cracked Heat Exchanger

The second service call involved another older Raypak pool heater with a similar problem.

Again, the heat exchanger had cracked and the heater was actively leaking water.

The photos below document the condition of the existing Raypak heater, including the water leakage and corrosion around the failed heat exchanger, followed by the new Rheem installation.

Before — Aging Raypak Pool Heater

Leak & Corrosion — Cracked Heat Exchanger and Water Leakage

After — New Rheem P-M266A-EN-C

What These Two Jobs Show

These were two separate service calls, but the decision-making process was very similar.

Neither homeowner was simply replacing a pool heater because it was old.

The existing heaters had a specific major problem: cracked heat exchangers with active water leakage.

Once a major component such as the heat exchanger fails, the age and overall condition of the heater become important.

If the rest of the equipment is in excellent condition and the repair is reasonable, repairing the existing heater may still be an option.

But if an older heater already has significant corrosion or other aging components, spending a substantial amount on one major repair may not make sense.

That is why the repair-versus-replacement decision should be based on the actual condition of the equipment rather than simply its age.

Why Replace a Leaking Pool Heater in the Fall?

At the end of the swimming season, it can be tempting to simply shut the heater down and wait until spring.

In some situations, waiting may make sense.

However, replacing an older heater with a major failure before winter can have some practical advantages:

• The existing problem is resolved before the heater sits unused for the winter.

• You do not have to start the next pool season with a known equipment failure.

• The replacement can be planned before the busy spring pool season.

• The new heater will be ready when the pool is opened.

• There is more time to plan the installation instead of dealing with a failure when the heater is urgently needed.

That does not mean every leaking pool heater should automatically be replaced in the fall.

The condition of the heater and the homeowner's plans for the next pool season still matter.

When Waiting Until Spring May Make Sense

Waiting until spring can be reasonable in some situations, particularly when the heater is relatively new and the problem is repairable.

Age of the Heater

A relatively new heater with one repairable problem may be worth repairing.

An older heater with a major component failure can be a different situation, especially if other components are also showing signs of wear or corrosion.

Cost of the Repair

The cost of repairing a major component should be considered together with the age and overall condition of the heater.

If a significant repair is likely to be followed by additional repairs, replacing the heater may become a more practical option.

Parts Availability

Parts availability is another consideration with older pool heaters.

If replacement parts are difficult to obtain, a repair may take longer or may not be practical depending on the specific heater.

Overall Condition

A cracked heat exchanger is an important failure, but it is not the only thing to consider.

A technician should also look at the overall condition of the heater, including corrosion, controls, ignition components, burners, sensors, water connections, and other major components.

What About Pool Heater Prices Next Spring?

Some homeowners may consider waiting because they expect equipment prices to change.

There is no guarantee that pool heater prices or installation costs will increase next year. However, there is also no guarantee that today's equipment pricing and availability will remain the same next season.

For that reason, the decision should primarily be based on the condition of the existing heater and your plans for the pool, rather than assuming prices will be higher or lower next spring.

Repair or Replace a Leaking Pool Heater?

There is no single answer that applies to every pool heater.

Repair may make sense when:

• The heater is relatively new.

• The rest of the equipment is in good condition.

• Replacement parts are available.

• The repair cost is reasonable for the age of the heater.

• There are no significant additional problems.

Replacement may make more sense when:

• The heater is older.

• The heat exchanger has failed.

• There is significant corrosion.

• The heater has had repeated problems.

• Multiple major components are beginning to fail.

• Replacement parts are difficult to obtain.

• The repair cost is difficult to justify compared with a new heater.

A proper inspection can help identify the actual problem and give the homeowner the information needed to make an informed repair-or-replace decision.

Pool Heater Repair and Replacement in Burlington, Hamilton and Surrounding Areas

AirPro Heating & Cooling provides pool heater repair and replacement in Burlington, as well as pool heater services in Hamilton, Ancaster, Dundas, Stoney Creek, and surrounding areas.

Our pool heater services include diagnosing heating problems, investigating water leaks, checking heat exchangers and other components, repairing equipment when appropriate, and installing replacement pool heaters when replacement makes more sense.

If your pool heater is leaking, showing signs of corrosion, failing to heat properly, or has a suspected cracked heat exchanger, the first step is to determine what is actually wrong with the equipment.

From there, you can consider whether repairing the existing heater or replacing it is the better option.

Need pool heater service in Burlington, Hamilton, or a surrounding area?

Call AirPro Heating & Cooling at 905-962-9077.

Frequently Asked Questions

Can a cracked pool heater heat exchanger be repaired?

In some cases, a heat exchanger problem may be repairable, depending on the heater design, the extent of the damage, parts availability, and the overall condition of the equipment.

For an older heater with significant corrosion or other problems, replacement may be worth considering instead of investing in a major repair.

Is it safe to keep using a leaking pool heater?

An actively leaking pool heater, especially one with a suspected cracked heat exchanger, should be professionally inspected before continued operation.

The cause and location of the leak should be identified first. Continuing to operate equipment with a significant water leak can potentially lead to additional damage.

What causes a pool heater heat exchanger to crack?

Heat exchanger failures can have several possible causes, including corrosion, scale buildup, water-flow problems, freezing conditions, and long-term wear.

The exact cause depends on the heater and its operating conditions, so the equipment should be inspected rather than assuming one specific cause.

How do I know whether to repair or replace my pool heater?

Consider the heater's age, overall condition, repair cost, parts availability, and whether other major components are also showing signs of wear.

A relatively new heater with one repairable problem may be a good repair candidate, while an older heater with a failed heat exchanger and significant corrosion may be more practical to replace.

Should I replace a leaking pool heater before winter?

If an older heater has a major failure such as a cracked heat exchanger and an active water leak, replacing it before the next pool season can be worth considering.

However, the decision should be based on the actual condition of the heater and the available repair and replacement options.

About This Pool Heater Replacement

Service: Pool Heater Replacement

Equipment Removed: Raypak Pool Heater

Problem: Cracked Heat Exchanger and Water Leakage

Replacement: Rheem P-M266A-EN-C Digital Pool Heater

Capacity: 266,000 BTU/h

Fuel: Natural Gas

Date: October 1, 2026

Job Location: Oakville, Ontario