# Home heating and thermostat efficiency issues

> Live situation record from CLSTR: https://clstr.news/situations/home-heating-and-thermostat-efficiency-issues
> Updated: 2026-08-31T09:10:09.000Z. Sources: 4. Developments: 2.

Issues with home heating efficiency have been linked to thermostat inaccuracies and radiator malfunctions. Inaccurate readings, frequently caused by aging components, dirt, or improper placement near windows or radiators, can lead to energy bill increases of 15% to 25%, according to ADEME.

Radiators that heat unevenly may be affected by trapped air, sludge buildup, faulty thermostatic valves, or hydraulic imbalances. Many of these issues can be addressed through simple diagnostic tests and maintenance, such as cleaning or bleeding the system, to resolve problems without professional intervention.

## Timeline

### 2026-08-31: Home heating efficiency: troubleshooting thermostats and radiators

Inaccurate thermostats and unevenly heating radiators can significantly increase energy costs. Common causes include poor device placement, air in the system, or sludge buildup.

4 sources. https://clstr.news/cluster/home-heating-efficiency-troubleshooting-thermostats-and-radiators

### 2026-08-18: Common causes of inaccurate thermostat readings

Inaccurate thermostat readings can cause discomfort and high energy bills. Common causes include dust buildup, faulty sensors, outdated models, and improper device placement.

3 sources. https://clstr.news/cluster/common-causes-of-inaccurate-thermostat-readings

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Cite as: Home heating and thermostat efficiency issues. CLSTR, https://clstr.news/situations/home-heating-and-thermostat-efficiency-issues