Panasonic
Temperature Fluctuation / Hunting
Water temperature fluctuates between hot and cold during a shower on Panasonic water heater.
Advertisements
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.
Advertisements
Possible Causes
Low or varying water flow, Scale buildup in heat exchanger, Faulty outlet thermistor, Sticking modulating gas valve
How to Fix / Troubleshooting
Scalding risk: Test water temperature carefully while troubleshooting.
- 1. Increase flow:
- Open the hot tap more fully.
- Clean aerators and shower heads to ensure stable flow.
- 2. Avoid mixing at tap:
- Set the heater to a comfortable temperature (e.g., 40–42°C) and use mostly hot water, minimizing cold mixing which can cause hunting.
- 3. Clean inlet filter: Ensure the inlet filter is clean to maintain consistent pressure.
- 4. Descale heat exchanger: If the unit is older or in a hard‑water area, perform a descaling procedure.
- 5. If fluctuations continue: Have a technician check the outlet thermistor and gas modulation valve for proper operation.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Heat Exchanger
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements