When heating is inadequate, it is recommended to follow a "self-check first, seek help later" approach.
First, observe the situation in your neighbors' homes: if the entire building lacks heat, the issue likely stems from the heat exchange station or the main distribution network, so you should immediately contact the property management office or the heating company; if only your home is cold, start by troubleshooting internally. Standard measures include: checking that the main inlet valve and individual radiator valves are fully open (the handle should be parallel to the pipe); if a radiator is hot at the top but cool at the bottom and makes a gurgling sound, loosen the air vent valve to bleed out air until the water flow stabilizes; cleaning the inlet filter screen to prevent blockages caused by sediment; and adjusting the hydraulic balance by partially closing valves on radiators closer to the heat source and fully opening those further away. Never drain water from the system yourself, as this disrupts the circulation loop. Remove any furniture or heavy curtains covering the radiators to ensure unobstructed heat dissipation. For users with independent gas-fired wall-hung boilers, ensure the unit is set to heating mode, the water pressure is between 1 and 1.5 bar, and the water temperature is set appropriately (50–60°C for radiators, 40–45°C for underfloor heating). If the radiators feel warm but the room temperature remains low, check the sealing of doors and windows; if necessary, install thick curtains or add external wall insulation. Limescale buildup inside older radiators can also hinder heat output; consider hiring professionals to flush the system. If you cannot resolve the issue yourself, contact property management or the local heating station to measure the inlet water temperature, request an on-site indoor temperature check, or call the local heating service hotline for assistance. By following these steps, effective solutions can be found for the vast majority of heating issues.