The Armstrong Furnace R37520B002 Rollout Switch is a critical safety component designed for precise thermal monitoring within residential gas furnaces

625" width guarantee compatibility without shroud interference

Broad Compatibility: Replaces legacy K15DS-18 and K15DA-18H series commonly found in HVAC and industrial gas appliances

maintaining the integrity of the float chamber is paramount for system uptime

Johnson Controls A19AAC-38 Utility Thermostat 30067439-890 The Armstrong Furnace R37520B002 RolloutJohnson Controls A19AAC 38 Utility Thermostat, 120 208 240 Vac, 50 280 Degree Temperature Range, 2 Degree Differential, SPDT, Bulb Style 1, Screw Driver Range Adjuster A19AAC 38 is identical to A19AAC 38C