Control shows 'Sensor Open' or similar; temperature reading may show extremely low or negative value.

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

Broken sensor lead, Unplugged sensor connector, Sensor element failure, Loose terminal at control board

Safety first: Turn off power before working on control wiring.

Verify connections: Locate the reported sensor and ensure its connector is fully seated at both the sensor and control board.
Inspect for broken wires: Gently flex the cable while observing for cracks or breaks, especially near strain points.
Resistance test: Disconnect the sensor and measure resistance. Infinite resistance (open circuit) indicates a failed sensor that must be replaced.
Replace sensor: Install a new Weil-McLain compatible sensor and route the cable to avoid stress and heat.

Medium 3/5

NTC Temperature Sensor

Check Price on Amazon

We may earn a commission from links on this page.