Home heating efficiency: troubleshooting thermostats and radiators

Home heating systems can experience efficiency issues due to thermostat inaccuracies and radiator malfunctions. Incorrect thermostat readings, often caused by poor placement near windows or radiators, can lead to energy bill increases of 15% to 25%, according to ADEME.

Common causes for thermostat errors include aging components, dirt, or improper calibration. Similarly, radiators that heat unevenly may suffer from air trapped in the circuit, sludge buildup, faulty thermostatic valves, or hydraulic imbalances. Simple diagnostic tests and maintenance, such as cleaning or bleeding the system, can often resolve these issues without professional intervention.