Should you repair or replace your pool pump?
Updated August 2026
← Every repair-or-replace call
A pool pump under 8 years old with a sound wet end is worth repairing, since a motor runs $150–400 and a shaft seal or capacitor $20–60; once the housing cracks or the repair tops half of a $500–1,500 installed replacement, buy the new pump. Pumps serve 8–12 years, and their failures split into two halves: the motor at the back, which is a standard part any pool shop swaps, and the wet end at the front, which is plastic that either holds pressure or does not. There is a 2026 wrinkle worth knowing. A variable-speed pump uses a fraction of the power an old single-speed burns, so replacing sometimes wins on the electric bill alone.
The short version
Separate the pump into its two halves before you price anything. The motor bolts to a standard frame and costs $150–400 to replace, and the consumables in front of it, a $20–50 shaft seal, a $20–60 capacitor, a lid O-ring, an impeller, sit in the same tier. None of that argues for a new pump under 8 years. The wet end is where the verdict flips: a cracked housing, a stripped volute, or a basket lid that leaks no matter which O-ring you fit means the plastic has aged out, and repairs there do not hold. Stack the 50% rule and the energy math on top. If the fix approaches half of a $500–1,500 installed pump and the old unit is a single-speed running hours a day, replacement is the stronger call.
Your situation, decided
| Situation | Verdict | Why |
|---|---|---|
| Motor hums or will not start, pump under 8 years | Repair | Usually a $20–60 capacitor; have it tested before ordering a motor |
| Water dripping from behind the impeller | Repair | A $20–50 shaft seal, a routine wet-end service |
| Motor bearings screaming, housing in good shape | Repair | A $150–400 motor bolts straight to the existing wet end |
| Housing or volute cracked, pump losing prime | Replace | Seals will not hold on cracked plastic at operating pressure |
| Single-speed pump past 8 years needing a motor | Replace | A variable-speed unit pays back on power the old pump wastes |
| Pump froze and split over the winter | Replace | Ice usually cracks the wet end and the motor end together |
What each path costs
Repairs typically run $20–400; a replacement is $500–1,500 installed installed. Pool pumps last 8–12 years. Motor and seal work pays through year 8; past that, or with a cracked wet end, a variable-speed replacement is the better spend. Price your own number on the home maintenance cost calculator before you commit either way.
The repair-or-replace call is easy when you know the unit's age and service history. OnOtto keeps both, plus the maintenance that delays this decision for years.
Start your home's service log, freeFrequently asked questions
Can I replace just the motor and keep the pump housing?
Yes, and it is the most common pool-pump repair there is. Motors mount to a standard frame, so a shop pulls the old one, fits a $150–400 replacement with a fresh shaft seal, and reuses the wet end and plumbing untouched. It only pays if the housing, impeller, and diffuser are sound and the pump is early in its 8–12 year life. On an older single-speed, compare that motor price to a full variable-speed pump before you commit.
Is a variable-speed pump worth the higher sticker price?
For most pools running several hours a day, yes. A single-speed pump runs flat out whenever it is on, while a variable-speed unit turns the water over slowly for far longer at a fraction of the wattage, which is why federal efficiency standards pushed large single-speed pumps out of new sales. The $600–1,500 installed price is offset by the monthly bill and by much quieter operation. If your pump is already failing, that is the moment to upgrade, not after you have paid for a motor.
Why does my pump lose prime or run with air in the basket?
Air is getting in somewhere on the suction side, and that is a repair every time. Check the pump lid O-ring first, then the drain plugs, the union fittings, and the skimmer water level; a dry O-ring at $8–20 is the usual answer. A clogged skimmer or pump basket starves the pump the same way. Running dry cooks the shaft seal within minutes and can crack the housing, which is how a $20 O-ring turns into a new pump. The pump checklist lists the weekly looks.
What kills pool pumps early?
Running dry and freezing, in that order. A starved pump overheats its seal fast, and a pump left full of water through a hard freeze splits the wet end outright, which no repair fixes. Clearing baskets, keeping the water above the skimmer mouth, and winterizing the pool handle both risks. Regular pump service catches a weeping seal before the bearings rust, which is the difference between a $30 part and a $300 motor.