Why isn't the radiator hot? Comprehensive analysis of causes and solutions
With the arrival of winter, the lack of heat from radiators has become a focus issue for many families. This article will combine the hot topics and user feedback from the entire Internet in the past 10 days to analyze the common reasons why the radiator is not hot, and provide structured solutions to help you quickly restore warmth.
1. Analysis of common reasons why radiators are not hot
| Ranking | Question type | frequency of occurrence | Typical performance |
|---|---|---|---|
| 1 | Air blockage | 42% | The upper part is not hot/there is a sound of water flowing |
| 2 | clogged pipes | 28% | Overall temperature is low |
| 3 | Not enough pressure | 15% | Multiple sets of radiators are not hot |
| 4 | Valve failure | 10% | Single radiator is not hot |
| 5 | System design issues | 5% | The end radiator is not hot |
2. Targeted solutions
1. Dealing with air blockage problem
(1) Find the air release valve on the top of the radiator
(2) Use a screwdriver to turn counterclockwise 1/4 turn
(3) After hearing the "hissing" sound, keep it open until water comes out
(4) Close the valve immediately and wipe away the water stains
2. Pipeline blockage treatment
| Blockage type | Cleaning method | Cycle suggestions |
|---|---|---|
| scale deposits | Professional chemical cleaning | every 3-5 years |
| Impurity accumulation | Backwash | Before heating every year |
3. System pressure check
(1) Check the pressure gauge (normal value 1.5-2Bar)
(2) If the pressure is insufficient, contact the property management company to make up for the pressure.
(3) Check whether there is any leakage point
3. Preventive maintenance suggestions
| maintenance items | Operational points | best time |
|---|---|---|
| System exhaust | Multiple operations in the initial stage of heating | October-November |
| Filter cleaning | Remove Y-type filter and rinse | 1 time per year |
| Valve inspection | Test switch flexibility | During the heating period |
4. Handling special situations
1. My neighbor’s house is hot but my own house is not.
Check whether the entrance valve is fully open and whether the filter is blocked. It is recommended to contact the heating company to troubleshoot the main pipe problem.
2. Old cast iron radiators don’t heat up
Due to structural reasons, it is easier to accumulate air, so the exhaust frequency needs to be increased; consider installing an automatic exhaust valve (the cost is about 50-100 yuan/piece).
5. Professional service selection guide
| Service type | Reasonable charging range | Things to note |
|---|---|---|
| Door-to-door maintenance | 80-150 yuan/time | Confirm which testing items are included |
| System cleaning | 300-800 yuan/household | Ask for comparison pictures before and after cleaning |
| Replace valve | 50-200 yuan/piece | Distinguish between ordinary valves and thermostatic valve prices |
Summary:90% of the problem of radiator not heating can be solved by self-treatment. It is recommended to follow the steps of "exhaust → check valve → clean filter → measure pressure" to investigate step by step. In case of complicated situations, you should contact professional maintenance personnel in time to avoid system damage caused by blind operations. Maintaining regular maintenance can extend the service life of your radiator by 5-8 years.
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