What's wrong with the wall-hung boiler not heating hot water?
Recently, many users have reported on social media and home appliance repair forums that wall-mounted boilers do not boil hot water. This problem is even more prominent in winter when temperatures plummet. This article will combine the hot topics and hot content on the Internet in the past 10 days to provide you with a detailed analysis of the reasons why the wall-mounted boiler does not boil hot water and the solutions.
1. Analysis of common causes
According to maintenance data and user feedback, the main reasons why wall-mounted boilers do not boil hot water are as follows:
| Cause classification | Specific performance | Proportion |
|---|---|---|
| Insufficient water pressure | The display prompts a low pressure alarm and the water flow is weak | 35% |
| Gas supply issues | Ignition failed, gas valve did not open | 25% |
| Temperature sensor failure | Water temperature fluctuates abnormally or fails to heat | 20% |
| Heat exchanger clogged | Heating efficiency decreases, accompanied by abnormal noise | 15% |
| other reasons | Circuit failure, system setting error, etc. | 5% |
2. Solution
For the above issues, you can try the following solutions:
1. Check water pressure
The normal water pressure of the wall-mounted boiler should be maintained at 1-1.5Bar. If the pressure is too low, pressurize through the water replenishment valve; if the pressure is too high, relieve the pressure through the drain valve.
2. Confirm gas supply
Check whether the gas valve is open and whether the balance in the gas meter is sufficient. If you suspect that the gas pipeline is blocked, contact a professional for repair.
3. Clean or replace temperature sensor
Wipe the sensor probe with a soft cloth. If it still does not work, it is recommended to replace it with a new sensor (market price is about 50-150 yuan).
4. Clean the heat exchanger
Use professional descaling agent for cycle cleaning, or contact after-sales service for in-depth maintenance (cleaning is recommended every 2 years).
3. Q&A on recent high-frequency user issues
| question | solution |
|---|---|
| Wall-hung boiler frequently flames out | Check whether the exhaust pipe is blocked and reset the air pressure switch |
| Hot and cold water | Adjust minimum power setting, check water flow sensor |
| Display error E1/E2 | Ignition failed, need to check electrode spacing and gas pressure |
4. Preventive maintenance suggestions
1. Check the water pressure gauge once a month
2. Clean the water inlet filter every quarter
3. When the system is not used for a long time in winter, the water stored in the system should be drained.
4. Purchase original parts to replace them (the failure rate of non-original parts is as high as 40%)
5. Maintenance cost reference
| Maintenance items | market price range | Suggestions |
|---|---|---|
| Door-to-door testing fee | 80-150 yuan | Prioritize brand after-sales service |
| Replace motherboard | 500-1200 yuan | Confirm whether it is within the warranty period |
| Replace water pump | 300-800 yuan | Pay attention to distinguish between circulation pump/booster pump |
If the problem is not solved after self-checking, it is recommended to contact the brand’s after-sales or professional maintenance personnel in time. According to data from the Consumers Association, the number of reports for wall-hung boiler repairs in winter increased by 60% year-on-year. Making an appointment in advance can avoid long waits.
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