Common Service Questions What causes this limit switch to trip frequently

Durable construction maintains alignment in high-cycle VAV terminal unit applications

ensuring the flame signal remains stable and the 100208085 burner assembly operates within manufacturer specifications

remove the regulator cap and turn the adjustment button clockwise to increase the outlet pressure or counter-clockwise to decrease it

2A current rating and a 250V AC voltage rating

Carrier HH18HA493 Limit Switch Common Service Questions What causesReplace your faulty safety sensors with the Carrier HH18HA493 Limit Switch, a precise furnace limit control designed for Carrier, Bryant, and Payne residential heating units. This genuine OEM replacement part is a disc style, normally closed (NC) safety device that monitors the heat exchanger and inducer housing temperatures. To prevent heat exchanger cracking or component failure, the switch is calibrated to open the circuit at 200F if overheating