When troubleshooting intermittent ignition failures or "no flame sensed" codes

preventing thermal overload and maintaining mechanical integrity

If the boiler continues to fill or fails to heat

Why is my burner flame yellow or roaring

Carrier 305078-751 Heat Exchanger Cell 321894-706 When troubleshooting intermittent ignition failuresThe Carrier 305078 751 Heat Exchanger Cell is a critical replacement component designed for high efficiency thermal transfer in residential and light commercial gas furnaces. Engineered for precise fitment in Carrier, Bryant, and Payne furnace models, including the 394G and 58GS series, this individual cell kit effectively restores the primary heating circuit's integrity. As a genuine OEM furnace part, it ensures the combustion process remains