Johnson Controls A19AAC-4 Temperature Control 30067439-890 the 1687-9 is the designated

the 1687-9 is the designated manufacturer replacement for the discontinued 1687-11 model

or visible vibration are key indicators

40" WC and the switch does not close (continuity test)

This OEM York furnace pressure switch features a Single Pole Normally Open (SPNO) configuration and is factory-calibrated to a -

Always verify the specific configuration of your current manifold before installation

Johnson Controls A19AAC-4 Temperature Control 30067439-890 the 1687-9 is the designatedThe Johnson Controls A19AAC 4 is a heavy duty, mechanical temperature control engineered for precision in HVACR applications. Built with a Single Pole Double Throw (SPDT) switch, this line voltage controller acts as a versatile solution for both heating and cooling equipment setups. The unit features a setpoint range of 0 to 80? F, specifically designed for low to medium temperature monitoring where a 5 degree F fixed differential is required for