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The RCD hh22ha236 is a single-pole single-throw (SPST) rollout and limit switch rated at 225 degrees F, designed for use in gas furnaces and heating systems. This manual-reset safety switch monitors burner flame rollout conditions. When abnormal heat or flame rollout is detected and the switch trips, the system shuts down and requires a manual reset before resuming operation. Licensed HVAC technicians install and service this component as part of routine furnace safety maintenance or diagnostic repair work.
This switch is suited for residential gas furnace applications where flame rollout protection is required. It mounts in the burner compartment area and responds to elevated temperatures caused by blocked flue passages, cracked heat exchangers, or other combustion airflow problems. When compatibility is confirmed by part number cross-reference, it serves as a direct OEM-style replacement in Carrier and related heating equipment lines.
Listed in the input as a Carrier parts and accessories replacement. Confirm fitment by cross-referencing the OEM part number hh22ha236 against the furnace model nameplate before installation. No additional compatible model numbers were provided in the product data.
Installation should be performed by a licensed HVAC technician. Before replacing this switch, shut off power to the furnace at the disconnect or breaker and turn off the gas supply. Investigate the root cause of any rollout trip event before resetting or replacing the switch, as repeated tripping indicates an underlying combustion or venting problem that must be corrected. Follow applicable local codes and manufacturer service procedures during replacement.
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