or rattling noises during the furnace startup sequence often indicate a cracked or unbalanced inducer fan wheel

this Fenwal ignition module maintains consistent operation in high-vibration and moisture-prone HVAC environments

Smith natural gas water heaters and boilers that require a #34 orifice for correct BTU input

and Payne fan coil series including FA4B and FB4C models

Quiet Operation: Soft-start capability eliminated the "thump" associated with motor startup

Aaon S21398 Burner Bracket 320788-702 or rattling noises during theThe Aaon S21398 Burner Bracket is a precision engineered OEM replacement part designed to ensure the structural integrity and precise alignment of burner assemblies within high performance Aaon HVAC systems. As a critical component for maintaining safe and efficient combustion, this burner mounting bracket provides the necessary stability to prevent operational vibration and misalignment, which can lead to inefficient fuel consumption or equipment