Laars Heating Systems 2400-020 Thermal Cut Out 321894-706 leading to high-pitched whining or

leading to high-pitched whining or a failure to reach 3350 RPM

Verify the part number against your unit's data plate or service manual

If your blower assembly or housing is damaged

Key Benefits Precise Airflow Control: The 5-speed design enables fine-tuning of CFM delivery to match system requirements

Acoustic Performance: Transitions fan speeds smoothly to minimize start-up noise and air turbulence in the ductwork

Laars Heating Systems 2400-020 Thermal Cut Out 321894-706 leading to high-pitched whining orThe Laars Heating Systems 2400 020 Thermal Cut Out is a mission critical safety component designed for high capacity and residential boiler systems. Engineered to function as a fail safe manual or automatic reset limit, this Laars TCO replacement monitors internal heat levels to prevent catastrophic equipment failure. Specifically compatible with the Laars Mark II 9600 series, including HWG and CB models (sizes 150 250), as well as H, HW, and HP