Carrier HH19ZA190 Limit Switch 321894-709 allowing technicians to clear sediment

allowing technicians to clear sediment or replace internals without dismantling the entire iron body assembly

this adjustable motor pulley ensures reliable power transmission and maintains proper belt tension in demanding commercial air handlers

How do I troubleshoot a pilot that will not stay lit

and MK-573-51

Carrier HH19ZA190 Limit Switch 321894-709 allowing technicians to clear sedimentThe Carrier HH19ZA190 Limit Switch is a critical safety component engineered for precise thermal monitoring in residential and commercial HVAC furnace systems. This temperature actuated switch is designed to protect equipment and ductwork from overheating by interrupting the electrical circuit when the high limit threshold is reached. Specifically calibrated with a 190F Open and 150F Close thermal profile, it serves as a reliable flame rollout switch