🏊Pool Pump

CAPACITOR FAIL

Pentair · Pentair WhisperFlo Single Speed Pool Pump

Pentair Pentair WhisperFlo Single Speed Pool Pump CAPACITOR FAIL Error Fix: Motor Capacitor Failure

The motor start/run capacitor has failed. The motor hums loudly but does not turn, or turns very slowly and then trips the breaker. The capacitor is usually mounted on top of the motor or in a bracket on the motor body. A visually swollen, leaking, or bulging capacitor has obviously failed. Test with a multimeter in capacitance mode — reading should match the label rating (typically 30-50 microfarads, 370V). Replacement capacitors cost approximately $10-25.

warning2 fixes available✨ Free fix available

Quick Answer

Error CAPACITOR FAIL on the Pentair Pentair WhisperFlo Single Speed Pool Pump means: Motor Capacitor Failure. The top-ranked community fix is “Test and Replace Motor Capacitor” (medium difficulty, ~30 min, DIY cost: $20-$25). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · pool pump

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many pool pump repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $150-$250.

Other Pentair Models with Error CAPACITOR FAIL

Pentair IntelliFlo VSF Variable Speed Pool Pump

pool_pump · 2 fixes

Pentair IntelliFlo3 VSF Variable Speed Pool Pump

pool_pump · 2 fixes

Pentair SuperFlo VS Variable Speed Pool Pump

pool_pump · 2 fixes

Other Pentair Pentair WhisperFlo Single Speed Pool Pump Error Codes

FROZEN VOLUTE

Freeze Damage — Cracked Volute

Impeller Obstruction

Pump Lid O-Ring Leak

Motor Bearing Wear

Motor Overheating

Shaft Seal Leak

Loss of Prime / Air Leak

2 fixes

People Also Ask About Pentair Pentair WhisperFlo Single Speed Pool Pump Error CAPACITOR FAIL

What does error code CAPACITOR FAIL mean on a Pentair Pentair WhisperFlo Single Speed Pool Pump?

Error code CAPACITOR FAIL on the Pentair Pentair WhisperFlo Single Speed Pool Pump means: Motor Capacitor Failure. The motor start/run capacitor has failed. The motor hums loudly but does not turn, or turns very slowly and then trips the breaker. The capacitor is usually mounted on top of the motor or in a bracket on the motor body. A visually swollen, leaking, or bulging capacitor has obviously failed. Test with a multimeter in capacitance mode — reading should match the label rating (typically 30-50 microfarads, 370V). Replacement capacitors cost approximately $10-25.

How do I fix error code CAPACITOR FAIL on my Pentair Pentair WhisperFlo Single Speed Pool Pump?

The most successful fix is "Test and Replace Motor Capacitor" (medium difficulty, ~30 minutes). Estimated DIY cost: $20-$25. HomeMD has 2 community-ranked fixes for this error.

Is error code CAPACITOR FAIL on a Pentair Pentair WhisperFlo Single Speed Pool Pump serious?

This error is rated warning severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Can I fix Pentair Pentair WhisperFlo Single Speed Pool Pump error CAPACITOR FAIL myself?

Yes — the top-ranked community fix ("Test and Replace Motor Capacitor") is rated medium difficulty and takes about 30 minutes. Tools needed: T25 Torx screwdriver, Digital multimeter with capacitance, Insulated screwdriver.

How much does it cost to repair Pentair Pentair WhisperFlo Single Speed Pool Pump error CAPACITOR FAIL?

DIY cost: $20-$25. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Pentair Pentair WhisperFlo Single Speed Pool Pump have?

The Pentair Pentair WhisperFlo Single Speed Pool Pump has 7 other known error codes, including: FROZEN VOLUTE (Freeze Damage — Cracked Volute), IMPELLER CLOG (Impeller Obstruction), LID ORING LEAK (Pump Lid O-Ring Leak), MOTOR BEARING WEAR (Motor Bearing Wear), MOTOR OVERHEAT (Motor Overheating), and 2 more.

Which other Pentair models have the CAPACITOR FAIL error?

Error code CAPACITOR FAIL also appears on 3 other Pentair models: Pentair IntelliFlo VSF Variable Speed Pool Pump, Pentair IntelliFlo3 VSF Variable Speed Pool Pump, Pentair SuperFlo VS Variable Speed Pool Pump. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Pentair Pentair WhisperFlo Single Speed Pool Pump have?

The Pentair Pentair WhisperFlo Single Speed Pool Pump has 7 other known error codes:

FROZEN VOLUTE — Freeze Damage — Cracked Volute (2 fixes)
IMPELLER CLOG — Impeller Obstruction (2 fixes)
LID ORING LEAK — Pump Lid O-Ring Leak (2 fixes)
MOTOR BEARING WEAR — Motor Bearing Wear (2 fixes)
MOTOR OVERHEAT — Motor Overheating (2 fixes)
SHAFT SEAL LEAK — Shaft Seal Leak (2 fixes)
WONT PRIME — Loss of Prime / Air Leak (2 fixes)

Which other Pentair models have the CAPACITOR FAIL error?

Error code CAPACITOR FAIL also appears on 3 other Pentair models:

Pentair IntelliFlo VSF Variable Speed Pool Pump (pool pump) · 2 fixes
Pentair IntelliFlo3 VSF Variable Speed Pool Pump (pool pump) · 2 fixes
Pentair SuperFlo VS Variable Speed Pool Pump (pool pump) · 2 fixes

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