Carrier HT01AH851 Transformer 321702-401 also known as the Berko

also known as the Berko L130F temperature limit switch

Smith 100110278 Gas Valve is an essential OEM replacement component designed for high-efficiency residential and commercial water heating systems

protecting expensive motor windings from premature failure

A veteran tech will use a manometer to measure the actual draft pressure at the switch port

0 Cv valve body is engineered for long-term durability in professional environments

Carrier HT01AH851 Transformer 321702-401 also known as the BerkoThe Carrier HT01AH851 is a high capacity 1000VA control power transformer engineered for demanding industrial and commercial HVACR applications. Designed for versatile power distribution, this unit features a dual voltage primary 240 480V side and a 120 240V secondary output, providing the necessary step down for control circuits, contactors, and high draw relays. As a genuine OEM HVAC replacement part, it ensures precise electrical characteristics