Carrier HK06MB026 Pressure Switch 30067439-890 the Lennox 99K12 and the

the Lennox 99K12 and the 99K1201 are identical parts

which closes the contact to trigger a signal when the main Line M2 circuit opens to shut down the load

while the #10-32 coil terminals and 5/16-24 contact studs provide secure

Using it with natural gas would require an orifice change to maintain the correct BTU input and flame pattern

from receiver tanks and filter housings

Carrier HK06MB026 Pressure Switch 30067439-890 the Lennox 99K12 and theThe Carrier HK06MB026 Pressure Switch is the direct engineering successor to the HK06NA018, primarily utilized in high efficiency Carrier, Bryant, and Payne gas furnaces. As a Factory Authorized Part (FAP), this replacement ensures seamless integration with the inducer motor assembly to verify proper venting and combustion airflow. Designed for 24V control circuits, this differential air pressure switch is calibrated to respond to specific water