Key legal question
Whether the refusal to reimburse hot-water flat fees was arbitrary
Extracted holding
The refusal was not arbitrary in its result, because the tenant had not timely contested the hot-water flat fee under the contractually and legally prescribed procedure and could not attack it in the heating statement dispute.
Extracted reasoning
The hot-water fee was a separate contractual obligation introduced in 1999; the proper avenue was a timely challenge under the rent-adjustment rules, not the annual heating settlement.