A low-voltage issue and a heater warning may be related or independent. Repairing one supply concern does not automatically establish that every remaining thermal fault is historical.
Compare the reports
Keep the original scan, battery-work findings and the warning that returns afterwards. Note whether heating performance changed. A new current fault under normal supply conditions deserves assessment on its own evidence.
Do not clear all records repeatedly or assume a high-voltage heater needs replacement without checks. The specialist should use the correct thermal and electrical procedure and state what was verified. A clear before-and-after timeline helps distinguish a consequence of the earlier event from a separate unresolved fault.
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