HH18HA452 Roll Out Switch for Carrier Furnace, Replacement for Bryant Furnace Limit Switch HH18HA252, 95-320156, Flame Rollout Switch Part Number 4349806

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• 【Compatibility Description】HH18HA452 furnace limit switch, compatible with Carrier 58MCA, 340AAV, and 340MAV series, also for Bryant 340AAV 036040 CSA and for Payne 352MAV 048100 FCKA, can replace for old Carrier part numbers 95-320156, HH18HA252, etc.
• 【Function】Flame rollout switch with a core activation threshold of 250°F (approximately 121°C), it adopts a normally closed contact design. When the furnace temperature exceeds the standard due to flame rollout, air flow blockage, or heat exchanger malfunction, the contacts will disconnect quickly, cutting off the gas supply or heating circuit and thereby preventing fire hazards at the source.
• 【Material】Furnace limit switch for Carrier made of high-quality materials, it features moisture-proof and dust-proof properties. The overall material combination has passed rigorous environmental tests, enabling it to withstand vibrations and temperature fluctuations during furnace operation, thereby extending its service life.
• 【Installation Instructions】First, turn off the furnace power supply and gas valve. After recording the wiring configuration of the old switch, remove the mounting screws; then secure the new switch in the original position and make secure wire connections; finally, restore power and test the operating status. This is to avoid failure of the protection function caused by incorrect wiring or improper installation position.
• 【Perfect Service】If you have any questions about our HH18HA452 roll out switch, such as product quality, models, size, etc., please feel free to contact us, we will solve the problem for you as soon as possible within 24 hours.

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