Hydrotherm 14-00301-001 Pressure Switch 321894-708 providing critical over-temperature protection by

providing critical over-temperature protection by interrupting gas flow if water temperatures exceed safe operating limits

specifically models like HHY12A and HLY06

a specialized regulator spring for the gas valve

Utilizing this authentic Heil Quaker replacement part ensures that the system maintains its original factory-spec combustion efficiency and flue gas venting performance without the vibration or alignment issues common with aftermarket alternatives

while a lower pitch reduces airflow and leads to high head pressure

Hydrotherm 14-00301-001 Pressure Switch 321894-708 providing critical over-temperature protection byThe Hydrotherm 14 00301 001 Pressure Switch is a critical safety component engineered for precise monitoring of airflow and combustion gas pressure within hydronic heating systems and commercial boilers. This OEM Hydrotherm part serves as a direct replacement for Hydrotherm 02 4881, ensuring the burner only ignites under safe venting conditions. For technicians, this HVAC pressure switch is essential for preventing hazardous operation caused by