Carrier HT680056 Transformer 320735-701 A failing switch often results

A failing switch often results in ignition lockout or "pressure switch stuck open" error codes

Flexible Differential: Wide adjustment range prevents short-cycling in high-load commercial environments

The 100RB series is built with a rugged brass body and stainless steel internal components to withstand the vibrations of a condensing unit

This Parker fluid control component is built for reliability in harsh environments

Broad Compatibility: Direct replacement for various Bryant and Payne switching relays

Carrier HT680056 Transformer 320735-701 A failing switch often resultsWhen you're out in the field and find a secondary side with no voltage, the Carrier HT680056 Transformer is the reliable OEM replacement part you need to restore the 24V control circuit. Built specifically for Carrier, Bryant, and Payne equipment, this 40VA HVAC transformer handles the step down from a 120V primary to a steady 24VAC secondary output. It is a critical component for powering furnace control boards, ignition modules, and 24V thermostats.