Hayward Universal-HC Recall: Check Model HDFS400
Find the nameplate below the vent. If it says HDFS400, stop using the heater and contact Hayward for a free in-home inspection and repair.
If the nameplate below your Hayward Universal-HC heater’s vent says HDFS400, stop using the heater immediately and contact Hayward to arrange a free in-home inspection and repair by a qualified technician. The heater can produce high levels of carbon monoxide during operation, creating a risk of serious injury or death, according to the CPSC recall notice for model HDFS400.
What to do now if your heater says HDFS400
Take these three steps
- Stop using the heater immediately.
- Check the nameplate below the vent for HDFS400.
- Contact Hayward to arrange the free recall inspection and repair.
These are the actions specified in CPSC recall 26-777, dated September 17, 2026.
Do not restart an HDFS400 merely because it appears to run normally, displays no error code, or has not caused an obvious problem. The official instruction is to stop using the heater immediately, so recall verification takes priority over ordinary diagnostics.
Pause any plans to order replacement parts, adjust the heater, disassemble it, or attempt a repair. This recall concerns carbon-monoxide output during operation, not an ordinary no-heat fault. The qualified-technician remedy should come first.
How to identify the recalled heater
The decisive published identifier is HDFS400 on the nameplate below the heater vent. The CPSC says “HDFS400” appears at the top of the plate and “Hayward” at the bottom.
Use these published specifications as supporting identifiers, but do not substitute appearance for reading the nameplate:
| Identifier | Published description |
|---|---|
| Model | HDFS400 |
| Capacity | 400,000 BTU |
| Fuel type | Dual-fuel gas pool heater |
| Cabinet | Brown with a black top |
| Controls | Top-mounted digital control panel |
| Base | Molded base with integrated tie-down connections |
| Approximate size | 21 by 28 by 31 inches |
These model, capacity, design, and dimensional details come from the CPSC recall notice. The 400,000-BTU figure is the heater’s capacity, not the number of units recalled; the notice covers about 4,600 heaters.
The brown cabinet, black top, dimensions, and March-through-July 2026 sales period are supporting clues only. They do not establish recall eligibility by themselves. If the heater resembles the recalled product but has a different model number, contact Hayward rather than assuming it is included.
The published recall identifies HDFS400 specifically. It does not establish that every heater sold under the broader Hayward Universal-HC name is recalled.
Why Hayward recalled the HDFS400
An affected HDFS400 can produce high levels of carbon monoxide while operating, posing a risk of serious injury or death.
The CPSC reported no incidents or injuries. A trade-press report on the Hayward heater recall also reported no incidents and described the qualified-technician remedy. The absence of reported incidents or injuries does not override the immediate stop-use instruction.
Visible operation is not a recall test. Normal heat output, a clear display, or operation without an error code does not establish that an HDFS400 is unaffected.
How to arrange the free inspection and repair
Hayward offers a free in-home inspection and repair performed by a qualified technician. Use the manufacturer’s official HDFS400 recall page or one of these contacts:
- Phone: 855-500-5288
- Hours: Monday through Friday, 8 a.m. to 5 p.m. Eastern Time
- Email: HeaterInquiry@Hayward.com
Do not substitute an owner inspection, adjustment, disassembly, or repair for the published remedy. The official instructions call for an in-home inspection and repair by a qualified technician.
Ask Hayward’s recall representative what information is required and what process applies to your unit.
Recall scope and details the notices do not provide
The recall covers about 4,600 heaters sold nationwide through pool-equipment distributors, builders, and service professionals from March through July 2026. The reported sale price was about $5,600, according to the CPSC recall notice.
| Confirmed by the recall notices | Not provided on the reviewed recall pages |
|---|---|
| Affected model: HDFS400 | Serial-number range |
| Carbon-monoxide hazard during operation | Date-code or manufacturing-date range |
| Stop using the heater immediately | Defective component |
| Sales period: March through July 2026 | Inspection and repair procedure |
| About 4,600 units | Service scheduling time |
| Free in-home inspection and repair | Proof-of-purchase requirements |
| Work performed by a qualified technician | Replacement eligibility |
Because the reviewed CPSC and Hayward recall pages do not provide a serial-number or date-code range, do not rely on an unofficial range. If the nameplate says HDFS400 but the purchase date falls outside March through July 2026, do not use the purchase date alone to rule out the recall. Stop using the heater and ask Hayward to confirm whether the unit qualifies.
Installers and secondhand buyers should check the nameplate before reinstalling, transferring, or purchasing a heater. Its appearance and a seller’s estimate of its age are not substitutes for verifying the model number.
Obtain instructions through Hayward’s official recall channel or the qualified technician rather than inferring circulation guidance from the recall.
If the nameplate says HDFS400, stop using the heater and contact Hayward for the free inspection and repair by a qualified technician. Do not let apparently normal operation, the absence of reported injuries, or uncertainty about the purchase date delay recall verification.