Carrier HH22HA236 Rollout Switch

The Carrier HH22HA236 Rollout Switch is a critical safety component designed for high-efficiency gas furnaces and packaged units. Rated for a fixed trip point of 225 degrees Fahrenheit, this SPST (Single Pole Single Throw) switch provides indispensable protection by detecting dangerous flame rollout or excessive heat buildup near the burner assembly. This manual reset rollout switch is engineered to open the electrical circuit upon reaching its temperature threshold, requiring a technician to physically inspect the heat exchanger and venting before restoring operation. This "manual-only" logic prevents the system from cycling under unsafe conditions, such as a cracked heat exchanger, blocked flue, or failed inducer motor.

As a factory authorized OEM replacement part, the HH22HA236 ensures exact fitment and calibration for a wide range of Carrier, Bryant, and Payne equipment. Its robust construction is built to withstand rigorous thermal cycling, ensuring the furnace safety limit remains reliable over years of service. Professionals prioritize this 225F limit switch for its precise response time and compatibility with most modern heat exchangers, though it is not intended for use with 48DJ/LJ or 580B/C models. When troubleshooting a "limit lockout" or "rollout switch open" error code, this genuine component restores the integrity of the combustion safety circuit.

• 225°F Thermal Protection: Precisely calibrated to trip at 225 degrees Fahrenheit to prevent fire hazards and internal component damage.
• Manual Reset Safety: Forced manual intervention ensures that the root cause of the rollout is diagnosed before the furnace resumes operation.
• OEM Compatibility: Designed specifically for Carrier, Bryant, and Payne units to maintain original equipment safety specifications.
• SPST Configuration: Direct single pole single throw action provides a clean break in the safety loop for immediate system shutdown.
• Durable Construction: High-grade materials designed for the high-heat environment of the burner compartment.

What causes this rollout switch to trip repeatedly?
Repeated tripping is usually a symptom of an underlying airflow or combustion issue, such as a soot-clogged secondary heat exchanger, a restricted exhaust vent, or insufficient gas pressure. It is imperative to check for these obstructions rather than just resetting the switch.

Is the HH22HA236 compatible with all Carrier models?
This switch is compatible with the vast majority of Carrier heat exchangers but should not be used in Carrier 48DJ/LJ or 580B/C models, which require different thermal specifications.

How do I test if the rollout switch has failed?
With the power off, use a multimeter to check for continuity across the terminals. If the switch is reset but shows an open circuit (no continuity), the internal bimetal disc has likely failed and the part requires replacement.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.