Fondital
Short Cycling in DHW Mode
Water heater cycles on and off rapidly when a hot tap is open, causing unstable temperature.
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Safety Warning
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.
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Possible Causes
Oversized burner for low flow, Faulty modulation control, Partially blocked DHW flow sensor, Incorrect minimum gas setting
How to Fix / Troubleshooting
Safety: Avoid scalding; water temperature may fluctuate.
- Increase flow: Open the hot tap more fully to increase flow and reduce cycling.
- Clean flow sensor: Remove and clean the DHW flow sensor to ensure accurate flow measurement.
- Professional adjustment: A technician can adjust minimum gas rate and check modulation to reduce short cycling.
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Repair Difficulty
Medium
3/5
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