Why isn't the radiator hot? Comprehensive analysis of causes and solutions
As winter approaches, radiators not heating up have become a common problem faced by many families. This article combines the hot discussions and expert suggestions on the Internet in the past 10 days to provide you with a systematic analysis of the possible reasons why the radiator is not hot and the corresponding solutions.
1. Common reasons why the radiator is not hot
| Reason type | Specific performance | probability of occurrence |
|---|---|---|
| Air blockage | Radiator to heat up and cool down | 45% |
| Insufficient water pressure | The whole system temperature is low | 25% |
| clogged pipes | Some radiators are not hot | 15% |
| Thermostatic valve failure | Adjustment is invalid | 10% |
| System design issues | Newly installed system has poor performance | 5% |
2. Targeted solutions
1.Dealing with air blockage problems: Use the exhaust key to open the exhaust valve until the continuous water flow is discharged and then close it. It is recommended to exhaust air 2-3 times a year during the initial heating period.
2.Water pressure check: Check the pressure gauge (standard 1.5-2Bar). If it is too low, contact the property management company to replenish water. Note: The floor heating system requires professionals to operate.
| System type | Standard pressure | Detection method |
|---|---|---|
| Ordinary radiator | 1.5-2Bar | Observe the manifold pressure gauge |
| Floor heating system | 1-1.5Bar | View the boiler display |
3.Pipe cleaning: It is recommended that old systems be professionally cleaned every 3-5 years. Cleaning agents purchased online can be used for temporary treatment. Severe blockage requires disassembly and flushing.
4.Valve maintenance: Check whether the temperature control valve is fully open (the mark on the valve body is aligned with the pipe to be in the open state). If the valve core is damaged, it needs to be replaced.
3. Handling of special situations
1.Single group is not hot: Turn off other radiators first and flush the problem group separately. If it is an end radiator, try adjusting the system balance valve.
2.Problems with new system installation: Check whether it is a "large circulation" system (a circulation pump needs to be installed), or whether there are design defects such as "reverse slope" in the pipeline.
| Problem manifestation | Possible reasons | solution |
|---|---|---|
| Some rooms are not hot | Pipe too long/pipe diameter too thin | Install circulation pump |
| Large temperature fluctuations | Insufficient system capacity | Increase the number of radiator groups |
4. Preventive maintenance suggestions
1. Comprehensive inspection before heating: including pressure test, valve flexibility check, and exhaust valve status confirmation.
2. Install the filter: Install a Y-type filter in the household pipe and clean the filter regularly (once a month is recommended).
3. System upgrade: Old cast iron radiators can be replaced with copper-aluminum composite materials to increase thermal efficiency by more than 30%.
5. Professional service selection guide
| Services | Market quotation | Things to note |
|---|---|---|
| System cleaning | 200-500 yuan/household | Confirm the use of pulse cleaning equipment |
| Radiator replacement | 150-300 yuan/group | Includes disassembly and installation costs |
| Pipeline modification | 80-150 yuan/meter | Request a warranty contract |
Through the above system analysis, most heating problems can be effectively solved. If trying basic methods fails, it is recommended to contact professional HVAC personnel in time to avoid system damage caused by self-disassembly and assembly. Keep your heating system in good condition to ensure warmth through the winter.
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