The Schneider Electric R820-PCB-A01 is a critical replacement 24Vac electronic PCB input board engineered for both single phase and three phase HVACR systems

or internal element degradation

or restricted heat exchanger

Why does my furnace light and then shut off after 5 seconds

Maintaining proper fluid management within your air handling system is essential for protecting the motor and ensuring reliable condensate drainage

Modine 5H0780340006 Pressure Switch 30067439-890 The Schneider Electric R820-PCB-A01 isThe Modine 5H0780340006 Pressure Switch is the genuine OEM replacement for the discontinued 5H78034 6. As a critical safety component for Modine natural gas HVAC equipment, this switch is engineered to monitor combustion air pressure during the ignition sequence. It ensures the inducer motor is moving sufficient air to safely exhaust flue gases before the gas valve is permitted to open. For field technicians, this Modine 5H0780340006 is the exact