Product image pending

We track images separately from defect reports.

Home & Garden

Hayward H400FDN

3 source-linked failure reports. Most reported: Explosion / rupture. Typical failure around 4.7 yr.

Reliability signal — · Insufficient data · data confidence Very Low

3 confirmed failure reports

Reliability summary

What is likely to go wrong, when it happens, and how expensive it can be — from source-linked failure reports. Counts are reports in our database, not a population failure rate.

Reliability signal

—

3 confirmed failure reports · Insufficient data · Data confidence: Very Low

Need at least 5 confirmed failure-signal reports before showing an A–F grade.

Most common issue
Explosion / rupture
Typical first failure
4.7 yr
Median of confirmed reports with timing
Median repair cost
—
Reported costs only · market varies
Highest reported repair
—
Not a quote · costs differ by country

What breaks?

Failure types

Click a type in the reports section below to filter.

  • Explosion / rupture1 · 33.3%
  • Electrical shock / short1 · 33.3%
  • Fire / ignition1 · 33.3%

When does it break?

Failure timing

Months after purchase, using reports that included timing.

What does it cost?

Reported repair costs

Distribution of owner-reported repair costs— not a quote or guarantee. Labor and parts prices vary by country.

No reported repair costs yet for this model.

Median months to failure

56

Failure reports

3

View →

Median repair cost

—

Still recommend

—

% repaired

—

% mfr warranty

—

% extended warranty

—

% support helpful

—

Use these reports as a risk signal, then check current listings before you buy.

Search this model on Amazon

As an Amazon Associate, After Warranty may earn from qualifying purchases.

What breaks?

What breaks? · reports

Explosion / rupture

Swimming Pool Equipment (3262)

Government / agencyIndexed Oct 28, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20241222-10191-2147334440. Severity: Incident, No Injury. Matched catalog product: Hayward H400FDN. Source model text: W3H400FDN. Incident: Pool heater Hayward W3H400FDN explodes at start of heat cycle. Can't find a warranty company who will correct the problem (near [REDACTED]) or even respond. Heater is 1 week old (in-ground). New gas regulator installed but did not correct the problem. Did not find a recall on this model. Unit purchased by home owner, installed by a pool builder. No injuries. Please advise

UnverifiedEvidence ★★★★☆
View report details

Months until failure

Not stated

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

92%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

Electrical shock / short

Swimming Pool Equipment (3262)

48 months

Government / agencyIndexed Oct 22, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20170615-26529-2147399691. Matched catalog product: Hayward H400FDN. Incident: I have a 4 year old Hayward model H400FDN natural gas swimming pool heater, for an in-ground pool. I recently found the clear and painted power and temperature control plastic "lens" for the control panel, on the ground, having become unglued. The control panel has slots in it where rain can easily enter the circuit board, mounted directly beneath it, and connected to the electronic control buttons, causing the electronics to be exposed to water and creating a potential electrical shock hazard, as well as causing a short and failure of the circuit board. This is an incredibly poor design, and more importantly, a dangerous design, especially centered around a swimming pool, where barefoot bathers will come in contact with the electronic controls. In addition, a replacement for this is over $150. This could have easily been avoided had the design for the lens been large enough to be held in place by the surrounding bezel, which curiously has a foam gasket around it in an attempt to keep moisture out. I've emailed the company and the response was to merely purchase a replacement part at over $150 and they gave me retail pool dealers where I can purchase this part. Because of this poor design, and because of the potential of a shock hazard, I am contacting this office of The Consumer Product Safety Commission to look into the lack of safety inherent in this design.

UnverifiedEvidence ★★★★☆
View report details

Months until failure

48 months

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

92%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

Fire / ignition

Swimming Pool Equipment (3262)

64 months

Government / agencyIndexed Oct 16, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20260418-A2DBD-2147320414. Severity: Incident, No Injury. Product: Hayward H400FDN (Hayward Natural gas pool heater with OmniLogic automation added). Incident: Natural gas pool heater safety features failed and unit found engulfed in flames. Written to Hayward: Recently your product safety features on our pool heater failed and,had I not been home, my house would have burnt with my son and dog Inside. Luckily I heard it cut off before it reached the temperature I had it set to and rounded the corner to check why to see it engulfed in flames. The fire department made it in time to put it out before the house caught. I am facing expenses of over $50,000 to correct the damage after recently spending nearly $50k to install a spa and automation. We never got to use the spa one time. I also have a renewed $17,000 hurricane deductible.l because if this claim. No one at Hayward or my pool company seems to think they have any responsibility for why this happened, just bad luck. It still sits in a pile of melted rubber and metal as I try to figure out how to move forward. Weve had our pool maintenanced weekly by our pool installer and they claim its likely an internal failure if your product. They have given us another quote to install your products and I feel appalled by the thought of trusting your company again with my familys safety. They claim there is no maintenance needed on these, only troubleshooting. We had no error code. Unreal! I am awaiting the final costs of damages to the house, pool equipment, paint. All weve received are excuses, dismissal and expenses. As business owners, I am disgusted and discouraged at the lack of quality both product and customer service. Sad.

UnverifiedEvidence ★★★★☆
View report details

Months until failure

64 months

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

88%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

Compare nearby models

Similar products

Stay ahead of failures

Notify me about this model

Get an email when a new source-linked failure report is published for the Hayward H400FDN.

We only email when a new published report is added for Hayward H400FDN. No spam, unsubscribe by contacting support.

Contribute signal

Had a failure with this model?

Add your experience and help future shoppers understand what happens after the warranty.

Submit your experience