In Ireland, landlords generally must keep the property’s heating appliances safe, working and properly maintained, and provide effective heating in habitable rooms. Tell your landlord or letting agent promptly, preferably in writing, explain the problem and keep records of messages, visits and expenses; allow reasonable access for repairs. If the issue is urgent or remains unresolved, contact the local authority housing standards section or seek advice before arranging costly work or withholding rent. The RTB can deal with a dispute, but any outcome depends on the tenancy’s facts and the evidence provided.