Johnson Controls A11D-4 Temperature Control Els PW 17895 extending the service life of

extending the service life of the solenoid assembly

ensuring a secure pin connection and housing fit

ensuring a perfect physical fit and proper clearance for the fan blade assembly

and HE220 humidifier models

While it could be a faulty switch

Johnson Controls A11D-4 Temperature Control Els PW 17895 extending the service life ofThe Johnson Controls A11D 4 Temperature Control is a heavy duty low temperature cutout freezestat engineered specifically to protect hydronic coils, cooling coils, and liquid handling pipes from icing and over cooling. This mechanical temperature control utilizes a 20 foot sensing element to detect the coldest point along its entire length, ensuring that localized freezing triggers the safety response. With a SPDT switch and manual reset