Schneider Electric (Square D) 8910DPA43V09 Contactor Els PW 17895 Common failure modes include a

Common failure modes include a "chattering" sound indicating coil weakness

and thermostats in York

this 1/4" ODF moisture indicator is designed to handle the higher operating pressures of R-410A

the internal contacts have likely failed and the unit requires replacement

Schneider Electric (Square D) 8910DPA43V09 Contactor Els PW 17895 Common failure modes include aThe Schneider Electric (Square D) 8910DPA43V09 Contactor is a heavy duty 3 pole definite purpose contactor engineered for demanding HVACR applications, including commercial refrigeration and large tonnage air conditioning units. Rated for 40 FLA (Full Load Amperes) and 50A resistive loads, this Type DPA component provides reliable motor switching for 3 phase systems up to 600VAC. The 208 240V AC coil is optimized for high voltage control circuits,