It is typically mounted on the furnace vestibule panel or the blower housing

While some Allied or Armstrong units share platforms

The model A-AS4105 has a nominal holding capacity of approximately 4

The Alco X-11873-B5B cage is built to maintain system stability under varying load conditions

replacing part 4ACE2556A without modification

Weil McLain 389-900-229 Sensor Freon It is typically mounted onThe Weil McLain 389 900 229 Sensor is a critical 10k ohm NTC component designed for multi functional integration within hydronic heating systems. Engineered for high accuracy thermal feedback, this Universal 3 In 1 Sensor serves as an outdoor reset sensor, an indoor strap on supply sensor, or a specialized well sensor depending on your installation requirements. When utilized as an outdoor sensor, it allows the boiler control to modulate water