Shanghai Bursten Industrial Co, Ltd.
How to clean a boiler heat exchanger?
2025-12-16
Cleaning a boiler heat exchanger involves safely shutting down the unit, accessing the exchanger (often requiring burner removal), using a vacuum for loose debris, and then applying a chemical descaler or specialized cleaner (like phosphoric/oxalic acid or citric acid) via a flushing or soaking method, but for deep cleaning or if unsure, hiring a certified professional for Cleaning-In-Place (CIP) is recommended due to safety risks like carbon monoxide.
DIY (With Caution)
Safety First: Turn off power and gas supply to the boiler and allow it to cool completely.
Access the Exchanger: Remove burner assemblies and cover plates carefully.
Dry Clean: Use a shop vac (crevice tool) to remove loose soot, dust, and debris from the fins/tubes.
Wet Clean (For Mild Buildup):
Use a manufacturer-approved descaler or a dilute acid (like phosphoric/oxalic acid or citric acid).
Gently spray or brush the cleaner onto the exchanger, ensuring proper water flow control if using water.
Flush thoroughly with clean water.
Check Manufacturer Guidelines: Some boilers use specific brushes (nylon only) or methods; avoid harsh tools that scratch the surface.
Professional Cleaning (Recommended)
Chemical Flushing: Professionals use powerful descalers circulated through the system (Cleaning-In-Place) to remove scale and sludge.
Power Flushing: High-pressure water dislodges heavy debris.
Specialized Tools: They have access to specific brushes, chemicals, and knowledge to dismantle and clean sealed components safely.
When to Call a Pro
If you see soot, smell gas, or your carbon monoxide detector goes off.
For sealed boilers or complex systems where disassembly is risky.
If dry cleaning isn't enough and you're uncomfortable with chemical flushing.
Contact us
TEL: 008613781822862
ADD: Building 1, No 115, Lane 1276, Nanle Road, Songjiang District, Shanghai 201611, China
Address:Building 1, No 115, Lane 1276, Nanle Road, Songjiang District, Shanghai 201611, China
Tel：008613781822862
WeChat ID：mary681987