Why did my new furnace ignitor fail shortly after installation

The Honeywell 30735489-002 is a high-performance

Water Hammer Resistance: The inverted bucket design is inherently resistant to damage from hydraulic shocks

It is a best practice to replace these components during the inducer assembly swap to maintain a gastight seal

Carrier 110000272 Limit Switch 318423-701 Why did my new furnaceThe Carrier 110000272 Limit Switch is a critical high limit safety component engineered for precise thermal regulation in Carrier, Bryant, and Payne heating systems. This OEM replacement part is calibrated as an L165 40F limit switch, meaning the internal contacts are designed to open at 165F to prevent heat exchanger damage and automatically reset once the temperature drops to 40F. Featuring a robust snap action mechanism and a double break contact