What should I do if the return pipe is not hot? Comprehensive analysis of causes and solutions
Recently, the heating issue has become one of the hot topics on the Internet, especially the common phenomenon of "the return water pipe is not hot" has triggered widespread discussion. This article will combine the hot topics of the past 10 days to provide you with a detailed analysis of the causes and practical solutions.
1. Common reasons why the return pipe is not hot
| Reason type | Specific performance | Proportion (whole network data) |
|---|---|---|
| poor circulation | Pipe blockage or air blockage | 42% |
| Not enough pressure | System water pressure is lower than standard value | 28% |
| Installation issues | Pipe slope is reversed or pipe diameter does not match | 18% |
| Equipment failure | The circulation pump is damaged or the thermostat fails. | 12% |
2. Step-by-step solution
Step 1: Initial Check
• Check the heating system pressure gauge (standard value 1.5-2Bar)
• Touch the temperature difference between the water inlet pipe and the return pipe (normal temperature difference is 15-20℃)
• Listen to the pipes for any sounds of water flow or unusual noises
Step 2: Exhaust Treatment
| operating position | Correct method | Things to note |
|---|---|---|
| Radiator exhaust valve | Turn counterclockwise until water comes out without bubbles | Prepare water container |
| Water distributor exhaust valve | First close the branch valves and then exhaust one by one | Avoid releasing large amounts of water |
Step 3: System Cleaning
If the exhaust is ineffective, professional cleaning may be required:
•chemical cleaning: Suitable for old systems more than 5 years old
•Physical cleaning: Pulse wave or sponge projectile method
•Fee reference: 80-150 yuan/group (varies from place to place)
3. Handling special situations
| Problem phenomenon | Professional solutions | DIY feasibility |
|---|---|---|
| Single heater is not hot | Adjust diverter flow balance | ★☆☆☆☆ |
| The backwater in the whole house is cold | Check circulation pump operating status | ★★☆☆☆ |
| intermittent lack of heat | Clean filter or replace thermostatic valve | ★★★☆☆ |
4. Preventive measures
1.Heating season maintenance: Clean the system 1 month in advance
2.Routine maintenance: Check the pressure gauge once a month
3.water quality management: Add preservatives (once every 2 years)
4.Equipment upgrade: It is recommended to install a circulation pump in old residential areas
5. Maintenance service data reference
| Service type | average response time | Charge range | Satisfaction |
|---|---|---|---|
| Emergency door-to-door | Within 2 hours | 200-400 yuan | 92% |
| Make an appointment for maintenance | Within 24 hours | 80-150 yuan | 88% |
| System cleaning | Reservation required in advance | 500-1000 yuan | 95% |
Warm reminder:If handling it yourself does not work, it is recommended to contact the property management or professional HVAC company. According to the latest consumer protection data, 63% of complaints about heating problems were due to improper DIY operations, which led to increased losses. Safety first, leave professional matters to professionals!
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