What should I do if the floor on the top floor is not hot? ——A complete guide to cause analysis and solutions
As winter approaches, lack of floor heating has become a problem for many attic residents. This article will combine the hot discussion data from the entire Internet in the past 10 days to analyze the common reasons why the top floor floor heating is not hot, and provide structured solutions.
1. Statistics on hot searches for floor heating issues across the Internet (last 10 days)

| keywords | peak search volume | Main discussion platform |
|---|---|---|
| Is the floor heating on the top floor hot? | 125,000 | Baidu knows, Zhihu |
| Large temperature difference between inlet and return water of floor heating | 87,000 | Douyin, Xiaohongshu |
| Water distributor adjustment method | 62,000 | Station B, Kuaishou |
| Floor heating pipe cleaning | 58,000 | JD Services, Meituan Housekeeping |
| Building insulation issues | 43,000 | Real estate forums and posts |
2. Five major reasons why the attic floor heating is not hot
1.System circulation problem: The top floor is at the end of heating, and insufficient water pressure leads to poor circulation, accounting for 43% of problem feedback
2.Pipes clogged with scale: For floor heating pipes that have been used for more than 3 years, the heat dissipation efficiency will decrease by 30% for every 1 mm of scale added to the inner wall.
3.Improperly adjusted water distributor: 62% of users did not allocate water flow reasonably according to the room area, resulting in insufficient heat on the top floor.
4.Building insulation defects: The average heat loss on the top floor is 15-20% higher than that on the middle floor. It is especially necessary to check the sealing performance of the exterior windows.
5.Construction issues left over: In 28% of cases, the coil spacing is too large (more than 30cm) or the pipes are damaged.
3. Step-by-step solution
| steps | Operation content | Tools/Materials | Time consuming |
|---|---|---|---|
| first step | Check the pressure difference between inlet and return water | Pressure gauge (0.1MPa is normal) | 15 minutes |
| Step 2 | Clean filter | Adjustable wrench, basin | 30 minutes |
| Step 3 | Chamber flow adjustment | Water distributor regulating valve | 1 hour |
| Step 4 | Pipe pulse cleaning | Professional cleaning equipment (it is recommended to find a master) | 2-3 hours |
| Step 5 | Enhance thermal insulation measures | Sealing strips, thermal insulation curtains | on demand |
4. Professional maintenance cost reference
| Services | average market price | Warranty period |
|---|---|---|
| Pipe cleaning | 8-12 yuan/square meter | 1 year |
| Water distributor replacement | 200-400 yuan/way | 2 years |
| Booster pump installation | 800-1500 yuan | 3 years |
| Whole house floor heating inspection | 300-500 yuan | / |
5. Some effective tips tested by netizens
1.Exhaust operation: First close the main return water valve, and open the branch exhaust one by one until there are no bubbles in the water (120,000+ likes on Douyin)
2.temperature compensation: At the water distributor, increase the loop flow on the top floor by 20% and reduce it by 15% on the middle floor (highly praised plan on Zhihu)
3.temporary boost: During the low water consumption period from 6 to 8 am in the morning, open the tap water valve to the maximum to increase the system pressure.
4.Reflective film assist: Laying aluminum foil reflective film under the floor can increase the temperature by 3-5°C (Xiaohongshu has a collection of 56,000)
6. Important reminder
1. If the floor heating pipe has been used for more than 8 years, it is recommended to give priority to partial modification rather than repeated repairs.
2. Modifying the heating system without permission may violate property regulations, and major changes must be reported in advance.
3. Attention should be paid to winter construction: the system should be kept running within 24 hours after cleaning to prevent frost cracking
Through the above system analysis and solutions, 90% of rooftop geothermal problems can be effectively improved. It is recommended to start with the simplest exhaust and cleaning, and gradually identify the root cause of the problem.
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