TopFeatured.com

We have a 3 unit house with hot water baseboard heat fired by an oil boiler. Apt 1 has her thermostat set at 70 but her room temperature is 82 so she set thermostat to 50 and the living room baseboard is hot, and not being controlled by thermostat. All other baseboards in the apartment are working normally as are all baseboards in apts 2 and 3. We changed her thermostat but baseboard is still heating too much. Any ideas on what to check??