Ideal
Cylinder Thermostat / Sensor Misconfiguration
Thermostat fails to control hot water cylinder temperature accurately
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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
Incorrect cylinder sensor type selected, Poor contact of strap‑on sensor, Mis‑wired cylinder stat to thermostat, Insulation missing over sensor
How to Fix / Troubleshooting
Safety first: Isolate power before working on cylinder wiring or sensors. Hot water cylinders can be very hot; wear appropriate protection.
Steps:
- 1. Verify sensor type: In the thermostat installer menu, ensure the correct cylinder sensor type (NTC or on/off stat) is selected.
- 2. Check sensor mounting: For strap‑on NTC sensors, ensure they are firmly strapped to the cylinder metal surface and covered with insulation to avoid air temperature influence.
- 3. Inspect wiring: Confirm the cylinder stat or sensor is wired to the correct thermostat terminals as per Ideal's wiring diagram.
- 4. Compare temperatures: Use a thermometer on the cylinder surface near the sensor to compare with the thermostat reading. Adjust calibration if available.
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Repair Difficulty
Medium
3/5
Required Part
Ideal Cylinder Temperature Sensor
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