Chaffoteaux Intermittent Heating / Cycling

Water temperature fluctuates between hot and cold during a shower.

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

Inconsistent water flow, Partially blocked plate heat exchanger, Faulty flow sensor, Oversized tap flow compared to heater capacity

Safety: Beware of sudden temperature changes causing scalding.

Stabilize flow: Avoid mixing hot and cold at the shower mixer while testing. Run only hot and adjust at the heater.
Clean inlet filter and aerators: Remove debris that can cause fluctuating flow.
Descale plate heat exchanger: Restore proper heat transfer and reduce cycling.
Check flow sensor: Clean or replace the DHW flow sensor if it gives intermittent signals.

Medium 3/5

Plate Heat Exchanger

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