How Much Does It Cost to Replace a Pool Pump Motor? (2026 Pricing)

Your pump housing is fine but the motor is dead, humming, or tripping the breaker. So now you're asking the big question: what's this going to cost? Here's real 2026 pricing, based on the parts we actually sell every week.

What does a pool pump motor replacement cost in 2026?

Plan on $400 to $900 for the motor itself, plus $150 to $350 in labor if you hire someone. Most homeowners land somewhere between $600 and $1,100 all in.

The spread comes down to horsepower and motor type. A basic single speed motor sits at the low end. A variable speed motor or a full motor and drive assembly sits at the top. As one real example, the Pentair 354821S 1 HP single speed motor runs $449 and fits both WhisperFlo and SuperFlo pumps.

How much is the motor by itself?

Here's what common replacement motors cost right now, using current prices from our own shelves:

• 1 HP single speed (Pentair 354821S, fits WhisperFlo and SuperFlo): $449
• 1.5 HP two speed (Afras, 56Y or 56C frame): around $390
• 2 HP single speed (Pentair 354815S, 56Y frame TEFC): $589
• 3 HP single speed (Pentair 354817S for WhisperFlo and WhisperFloXF): $763
• Variable speed motor (Pentair 350305S for IntelliFlo): around $720
• Variable speed motor and drive assembly (Pentair 353132S for SuperFlo VS): $1,122

Notice the pattern. Single speed motors are the cheapest fix. Once a variable speed pump needs a motor or drive, the price climbs fast, and that changes the repair vs replace math (more on that below).

What about labor? Can I do it myself?

A pool tech will usually charge $150 to $350 to swap a motor, and the whole job takes them an hour or two. If you're handy, this is a very doable weekend project.

The motor swap itself is mostly bolts and wire connections. The parts people forget are the small ones. Always replace the shaft seal when you change a motor (it's cheap insurance), and check the gaskets and o-rings while everything is apart. Reusing a tired shaft seal on a new motor is the fastest way to ruin it.

One safety note. Kill power at the breaker before you touch anything, and take a photo of the wiring before you disconnect it. If any of that makes you nervous, pay the tech. It's cheap compared to a fried motor.

Why do some motors cost twice as much as others?

Four things move the price:

• Horsepower. A 3 HP motor costs a few hundred more than a 1 HP motor, plain and simple.
• Single speed vs variable speed. Variable speed motors have magnets and electronics inside that single speed motors don't. That's why a motor like the 354821S is $449 while a variable speed assembly can pass $1,100.
• Frame and flange type. Square flange (56Y), C-flange (56C), and threaded shaft motors are not interchangeable, and some are pricier than others. Match what you have.
• OEM vs aftermarket. Genuine Pentair and Hayward motors cost more than off-brand ones, but the fit and warranty are usually worth it on a pump you plan to keep for years.

Should I replace the motor or buy a whole new pump?

Quick rule: if the motor costs less than about 60 percent of a comparable new pump, and the wet end is in good shape, replace the motor. If your pump is 10 or more years old, or the housing is cracked or leaking, put the money toward a new pump instead.

There's one more wrinkle in 2026. Federal efficiency rules pushed most new pumps to variable speed, so a brand new pump often costs $1,200 to $2,000 installed. That makes a $449 motor swap on a healthy single speed pump like a WhisperFlo look pretty smart. Your pump body, plumbing, and electrical all stay exactly where they are.

On the flip side, if you're already paying high electric bills, a failed motor can be a good excuse to step up to variable speed and start saving every month.

The short answer on 354821S and motors like it

For most in ground pools running a WhisperFlo or SuperFlo, a motor replacement in 2026 means roughly $449 for a 1 HP motor like the Pentair 354821S, a new shaft seal for a few bucks, and either a free afternoon or a couple hundred dollars of labor. That's usually half of what a full pump replacement would run, and your pool is back up the same day.

Pentair 354821S 1 HP WhisperFlo Single Speed Motor TEFC (208-230/115V, fits SuperFlo and WhisperFlo)

$449.00

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