Modine Recalls Over 6,000 Heat Pump Ventilation Fans Due to Fire Hazard Following $2.7M in Property Damage

Modine Manufacturing Company, in coordination with the U.S. Consumer Product Safety Commission (CPSC), has issued a voluntary recall for roughly 6,000 ventilation fans used in its commercial heat pumps. The recall specifically targets the OA/EA ventilation fans installed in Airedale by Modine ClassMate DX Cooling and Air Source Heat Pumps, as well as SchoolMate Water/Ground Source Heat Pumps. For school districts and facility managers, this means the units currently supplying heating, cooling, and indoor air quality management in their classrooms require immediate attention.[1][2]

The ClassMate and SchoolMate lines are single-packaged vertical unit ventilators, designed specifically for the acoustic and spatial constraints of school environments. By combining heating, cooling, and ventilation into a single footprint, these systems allow schools to manage climate control on a room-by-room basis without the need for extensive ductwork. The OA/EA (Outside Air / Exhaust Air) fans are critical components of this design, responsible for cycling fresh air into the classroom and expelling stale air to maintain high indoor air quality.[1][3]

However, the core safety issue stems from a vulnerability within the blower assembly's electronics. According to the CPSC and Modine, the ventilation fan motor can short-circuit if water comes into contact with the circuit board during operation. This electrical arcing can cause the units to overheat rapidly, presenting a significant fire hazard if left unaddressed.[1][2]

The mechanism of failure highlights the challenges of operating sensitive electronics in environments prone to moisture. While the exact source of the water ingress—whether from condensation, external weather conditions, or internal leaks—varies by installation, the result is consistent. When water bridges the electrical pathways on the fan motor's circuit board, it bypasses the system's intended resistance, leading to a surge in current that generates excessive heat.[1][3]

The recall was prompted by a series of thermal events linked directly to this defect. Modine has received 11 formal reports of incidents resulting in fires. While no injuries have been reported, these fires have caused at least $2.7 million in cumulative property damage. For a local school board operating on a tight maintenance budget, an unexpected fire in a mechanical room represents a catastrophic financial and operational disruption.[1][3]

The affected units were sold through independent dealers nationwide over a span of more than a decade, from August 2013 through January 2026. The heat pumps themselves were priced between $15,000 and $25,000, representing a significant capital investment for educational facilities. Additionally, the ventilation fans were sold separately as replacement parts for between $250 and $450.[1]

In total, the recall encompasses approximately 6,061 units sold in the United States, with an additional 735 units sold in Canada. The specific models affected include those with a ventilation configuration digit of C, D, or E for the CMD and CMP series, and H, J, K, N, or P for the SMG, SMW, and CMS series. The brand name "Airedale" is prominently displayed on a sticker on the front of the unit, while the exact model and serial numbers are located on the serial plate on the underside of the control unit.[1]

Facility managers and consumers are instructed to stop using the recalled heat pumps immediately. Because the units are often essential for maintaining classroom temperatures, Modine strongly advises that users temporarily disable the OA/EA ventilation fans or switch the internal disconnect to the "off" position until a certified technician can execute the final repairs. This allows the primary heating and cooling functions to continue operating safely while mitigating the fire risk associated with the fan motor.[1][2][3]

The company is providing written instructions for this temporary mitigation measure upon request, ensuring that on-site maintenance staff can secure the units without voiding warranties or causing further damage. Modine has stated that inspections and remedies have been ongoing since March 2026, indicating that the company identified the issue and began addressing it prior to the formal CPSC announcement.[2]

To permanently resolve the issue, consumers must contact their Modine distributor to arrange for a free inspection and service. Certified service technicians will inspect the units and either repair or replace the recalled heating and cooling ventilation fans at no cost to the consumer. Modine has implemented a comprehensive remediation plan to address the remaining affected units and is urging any facilities that have not yet been serviced to schedule an appointment immediately.[1][2]

The recall underscores the broader complexities of maintaining advanced HVAC systems in institutional settings. As schools increasingly rely on sophisticated heat pumps to meet energy efficiency and indoor air quality standards, ensuring the durability of electronic components against environmental factors becomes paramount. The push for electrification and higher efficiency often necessitates more complex control boards and variable-speed motors, which are inherently more sensitive to moisture than older, purely mechanical systems.[3]

Moving forward, the HVAC industry faces the ongoing challenge of designing more robust enclosures and applying protective conformal coatings to circuit boards exposed to the elements. For now, the immediate priority for school districts and facility managers remains identifying and disabling the affected Modine fans before further property damage can occur.[1][2][3]