Locked is not the same as broken
Community equipment often has deliberately limited controls, and some units are managed centrally, so a control that will not respond may be doing exactly what the facility asked of it. Establish whether the control is locked or managed before treating it as a fault.
What you are seeing
- The setting cannot be changed at all.
- The dial or panel appears to make no difference to the temperature.
- A display is dim, flickering or unresponsive.
- The unit cycles on a schedule that does not match the setting.
- The interior light stays on with the door closed.
- Not this fault: A completely dead cabinet is a start fault - read the will-not-start page.
- Not this fault: A warm cabinet with a correct setting belongs on the cooling page.
Most likely causes, in Direct Supply order
- Control deliberately locked or limited by the facility — Why ranked: First on this equipment. It is a specification rather than a fault, and it explains a control that will not respond at all.
- The unit is on a managed or scheduled circuit — Why ranked: Second: a cabinet that cycles on a schedule is being controlled externally, and no adjustment on the appliance will change it.
- Door switch stuck, leaving the light on and warming the cabinet — Why ranked: Third. A light that never goes off is a continuous heat source inside a small compartment.
- Thermostat sensor displaced from the airflow — Why ranked: Fourth. Once the sensor is out of position the control loses any relationship to the compartment temperature.
- Thermostat or control board failure — Why ranked: Last, and what remains once the lock, the schedule, the switch and the sensor position are all confirmed.
What to check, in order
- Ask whether the control is locked or set centrally for this unit. — Because: On community equipment this is the first question, and it resolves most control complaints on the spot.
- Close the door on a torch and check no light shows around the seal. — Because: A light left on warms a small compartment continuously and is easy to miss.
- Record the compartment temperature at two different settings over two days. — Because: On any control, measured behaviour is the only real evidence.
- Note whether the unit stops and starts on a repeating schedule. — Because: A schedule points at external management rather than at the appliance.
Checks you can do safely
- Check with facility maintenance whether the control is locked or managed. — N: 1 — Tools: None — Time: quick
- Press the door switch by hand and watch the interior light respond. — N: 2 — Tools: None — Time: quick
- Set the control to a mid position and record the temperature after a day. — N: 3 — Tools: Thermometer — Time: one day
- Change the setting one step and record again after a further day. — N: 4 — Tools: Thermometer — Time: one day
- Check the thermostat sensor is in its clip and in the airflow. — N: 5 — Tools: Torch — Time: quick
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Never spray cleaner at a control panel; liquid behind a membrane makes an intermittent fault permanent. Do not defeat a facility control lock; report the need instead. Never bridge or bypass a door switch to silence an alarm. Trust a thermometer over a display that disagrees with it.
When this becomes a service call
The temperature does not respond to a setting change over two days. The door switch does not operate when pressed. A display is unresponsive after a full power-down. The unit is not on a managed circuit and still cycles on its own schedule.
Nearest pages
What this page does not cover
This is generalized information for refrigerators supplied under the Direct Supply name. It prints no code table, because the spine carries no codes for this brand and appliance, and it does not separate locked or managed units from freely adjustable ones. Where a family- or model-specific page exists it supersedes this one.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
