Carrier HH18HA150 Limit Switch 319852-301 maintaining high system efficiency and

maintaining high system efficiency and protecting the compressor from liquid slugging

replacing the faulty lead with an OEM 48G63 will typically clear the fault and restore modulating functionality

For boilers with tankless coils (warm start)

Direct compatibility with Wilbur Curtis WC-37123 for seamless field replacement

Carrier HH18HA150 Limit Switch 319852-301 maintaining high system efficiency andThe Carrier HH18HA150 150F Limit Switch is a critical OEM safety component engineered for precise thermal monitoring in HVAC furnaces and residential air handlers. As a veteran grade L150 40F limit control, this switch is designed to open on rise when the heat exchanger reaches a threshold of 150F, effectively interrupting the burner circuit to prevent thermal stress or equipment damage. It features an automatic reset mechanism that closes once