ATAG Internal Water Leak

Furnace leaks water from the bottom of the casing

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

Leaking plate heat exchanger, Dripping automatic air vent, Faulty pump seals, Loose compression fittings on ATAG hydraulic block

Safety first: Isolate power. Water inside the appliance can contact live parts.

Remove the front panel and inspect for visible drips while the system is pressurised.
Check around the pump, automatic air vent, and hydraulic block for signs of corrosion or wetness.
Tighten accessible compression fittings gently; do not overtighten plastic components.
If the plate heat exchanger is leaking (water tracks from its body), it must be replaced by a technician.
Dry the area thoroughly and monitor for further leaks.

Hard 4/5

ATAG plate heat exchanger

Check Price on Amazon

We may earn a commission from links on this page.