Decision Helper

Repair or Replace?

Don't throw money at a dying unit. Use our "50% Rule" Calculator to see if your cooler is worth saving.

Repair vs. Replace

Financial analysis for your aging unit

Unit Age (Years)8 Years

New (1y)Avg Life (12y)Ancient (30y)

Primary Issue

Est. Repair Cost ($)

The "50% Rule" Explained

HVAC professionals generally recommend replacing a unit when the cost of repairs approaches 50% of the value of a new system. However, with swamp coolers, we also strongly weigh Age and Rust because these factors predict future failures.

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Rust is Fatal Once the cabinet or pan rusts through, structural integrity fails. Patches rarely last more than one season.

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Motor Cascade Effect If a motor dies after 10+ years, the pump and bearing assembly are likely close behind. Multiple repairs add up fast.

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Water Damage Spreads A leaking pan doesn't just waste water—it rots roof decking and can cause thousands in structural damage.

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Efficiency Gains New units with variable-speed motors use 30-50% less electricity than old single-speed models.

Average Swamp Cooler Lifespan

15-20

Years with proper maintenance

8-12

Years with minimal maintenance

5-8

Years in harsh water conditions

Hard water, coastal salt air, and skipped winterization dramatically reduce lifespan.

Warning Signs It's Time to Replace

Visible rust holes in the cabinet or pan

Water leaking onto the roof or into ducts

Motor replaced twice in the past 3 years

Unit is 15+ years old with recurring issues

Musty or moldy smell that won't go away

Loud grinding, squealing, or banging noises

Unit struggles to cool even on mild days

Excessive mineral buildup despite cleaning

Signs Your Cooler is Worth Repairing

Unit is under 10 years old

No visible rust on cabinet or pan

First-time motor or pump failure

Repair cost is under $300

Issue is just pads, belt, or float valve

Regularly maintained and winterized

Frequently Asked Questions

How much does a new swamp cooler cost?

A quality roof-mounted unit costs $500-$1,500 for the unit itself. Professional installation adds $300-$800 depending on complexity. Total replacement (including removal of old unit) typically runs $1,000-$2,500. Window units are cheaper at $300-$700 plus installation.

What are common repair costs?

Pads: $20-$80 (DIY) or $75-$150 (with service call)
Pump: $30-$60 (part) or $100-$200 (installed)
Motor: $100-$300 (part) or $200-$450 (installed)
Belt: $10-$25 (DIY) or $50-$100 (with service)
Float valve: $15-$40 (part) or $75-$125 (installed)

Can I upgrade to a more efficient unit?

Yes! Modern units with variable-speed motors and rigid media pads are significantly more efficient than old aspen-pad models. Two-stage coolers automatically adjust output based on temperature. While they cost more upfront, you'll save on electricity and enjoy quieter operation.

Should I repair a unit with minor rust?

Surface rust on the exterior cabinet can be sanded and painted—this is cosmetic. However, rust on the pan (bottom) is serious because water sits there constantly. If you can poke through the rust with a screwdriver, replacement is the only reliable fix. Pan patches rarely last more than one season.

Is it worth repairing a 15-year-old cooler?

At 15 years, you're at the end of typical lifespan. Minor repairs (pads, belt, float) are fine, but investing $300+ in a motor or pump often doesn't make sense. Even if this repair works, other components are likely to fail soon. Consider the repair a "band-aid" that buys you time to plan and budget for replacement.

What's the best time of year to replace?

Late winter or early spring is ideal. Contractors are less busy, you may find off-season discounts, and you'll be ready before the first heat wave. Avoid emergency replacements in June-August when demand (and prices) peak and wait times are longest.