Slant/Fin Boiler Section or Heat Exchanger Leak

Boiler base or jacket shows rust and corrosion, with occasional dripping

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Corroded cast iron sections on Slant/Fin boiler, Failed heat exchanger welds, Long-term oxygen ingress from system, Condensate corrosion

Safety: Turn off power and allow boiler to cool. Leaking heat exchangers can lead to structural failure.

Steps:

1. Confirm source: Remove jacket panels to inspect the actual boiler block or heat exchanger. Look for active seepage.
2. Check for system oxygen sources: Open expansion tanks or frequent fresh water makeup accelerate corrosion.

Professional repair: Internal leaks usually require major repair or boiler replacement. Have a qualified contractor evaluate options.

Professional Required 5/5

Boiler Heat Exchanger

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