What is the contact rating for this pressure switch

offering improved thermal resistance and electrical stability

Common Questions: Is the 24L18 compatible with newer R410A systems

making it a standard choice for professional boiler safety upgrades

Carrier HH680610 Step Controller 318973-401 What is the contact ratingThe Carrier HH680610 Step Controller is a critical Factory Authorized Part designed to manage the staging sequence in multi stage heating and cooling equipment. As a high precision HVAC step controller, it facilitates incremental capacity adjustments by activating small heating or cooling stages based on real time temperature fluctuations. This sophisticated modulation prevents system short cycling and optimizes energy consumption across multi stage