Hermetic (H)

while the 237 Ohm resistor is connected across terminals B and R to facilitate the 4-20 mA signal conversion

it is a vital step in the burnout cleanup process to verify that all residual acid has been neutralized or removed from the system

forcing the draft inducer motor to work within its intended performance curve

For a secure seal on the 019-01029-002

Nordyne 626432R Limit Switch Hermetic (H)Ensure the safe and efficient operation of your heating system with the Nordyne 626432R Limit Switch. This genuine OEM furnace part is a critical safety component designed for HVAC high limit protection, effectively preventing the heat exchanger from overheating. Operating as an automatic reset limit switch, this part features a fixed temperature setting of 145F to 165F (L165 20F), meaning it opens the circuit at 165F and automatically closes once