Lochinvar Keypad Failure / Stuck Buttons

Heater display is on but unresponsive; buttons do not change settings.

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

Failed keypad membrane, Moisture intrusion into control panel, Damaged ribbon cable

Safety: Turn off power before removing the control panel.

Steps:

Inspect panel: Remove the front bezel and check for signs of water ingress or condensation on the display and keypad.
Dry components: Gently dry any moisture with a soft cloth and allow the panel to air dry completely before reassembly.
Check ribbon cable: Ensure the cable between the keypad and control board is fully seated and not damaged.

If the keypad remains unresponsive, the display/keypad assembly will likely need replacement.

Medium 3/5

Display / Keypad Assembly

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