Always match the OEM temperature rating for the specific unit

it ensures the effective removal of moisture

or if the contacts remain stuck closed (causing the "fan only" or "constant heat" symptom)

What causes a 215F manual reset limit switch to trip

or improper manifold gas pressure pushing heat back toward the burner manifold

Carrier 30032021 Control Board Els PW 17895 Always match the OEM temperatureThe Carrier 30032021 Control Board is a critical OEM replacement part designed for high precision management of commercial HVAC systems and residential furnaces. This integrated circuit board serves as the central processing hub, coordinating essential sequences including gas flow regulation, ignition control, and blower motor speed. Engineered for high performance HVAC monitoring, the module utilizes a sophisticated logic controller to interpret real