Overheating
A flashing red screen with no text indicates that the User Interface (UI) has detected that it has got too hot.
Ensure the heater is not covered up or obstructed in any way. See image for clearance required around the heater. Clothing must never be placed on the heater. Decorative radiator covers are not permitted to be used with Quantum.
Power off the heater for a couple of hours and ensure no obstructions to the heater then power on the heater again. If the problem persists and the heater has not been covered, then the heater will need a service call to establish the root cause.
Possible Root Causes (If above has been ruled out):
- Storage elements were not inserted correctly into the core when the heater was installed.
- If the inner core cover is not correctly secured and the insulation correctly tucked in correctly.
- If none of these are the issue, it could be a faulty temperature sensor inside the User Interface screen – the solution is to replace the User Interface.

Applicable models
QM050RF, QM070RF, QM100RF, QM125RF, QM150RF
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