How to deal with air pressure switch failure
The air pressure switch is an important safety component in gas water heaters, wall-mounted boilers and other equipment. It is used to detect pressure changes in the exhaust system. Once a fault occurs, the device may not start properly or may pose safety risks. The following is a detailed guide on troubleshooting air pressure switches, compiled based on hot topics and common user questions on the Internet in the past 10 days.
1. Common faults of air pressure switch
| Fault phenomenon | Possible reasons |
|---|---|
| The device frequently reports error E5/E8 codes | The air pressure switch has poor contact or is damaged. |
| Automatically shut off after ignition | The wind pressure signal is not fed back to the motherboard |
| The exhaust fan is running but the unit is not working | The air pressure switch is not triggered or the pipeline is blocked |
2. Troubleshooting steps
1. Preliminary inspection
• Check whether the exhaust pipe is blocked or bent
• Confirm that the equipment installation environment is well ventilated
• Observe whether the air pressure switch connecting wire is loose
2. Professional testing methods
| Test items | Operation mode | normal value |
|---|---|---|
| Switch continuity test | Multimeter resistance measurement | Should be conductive (0Ω) when triggered |
| Stress response testing | Use suction and blowing to simulate wind pressure | There should be an obvious "click" sound |
| Voltage detection | Measure signal terminal voltage | Typically 5V/12V DC |
3. Maintenance plan
•Minor glitches:Clean contacts and reseat cables
•Moderate failure:Replace the silicone diaphragm or spring assembly
•Serious failure:Replace the air pressure switch as a whole (it is recommended to choose original accessories)
3. Summary of recent hot issues
| Platform | High frequency problem | solution |
|---|---|---|
| Zhihu | Air pressure switch false alarm fault | Check whether the smoke exhaust resistance exceeds the standard |
| Douyin | DIY replacement risks | It is recommended to contact professional after-sales service |
| Baidu Tieba | Accessories purchasing channels | Official mall or authorized dealer |
4. Precautions
1. Professional qualifications are required for gas equipment maintenance
2. Be sure to cut off the power supply and gas valve before repairing
3. Newly installed switches need to be tested for tightness
4. It is recommended to perform maintenance in advance during the peak season in winter.
5. Maintenance cost reference
| Maintenance items | Material fee | Labor cost |
|---|---|---|
| Routine testing | 0 yuan | 50-100 yuan |
| Replace switch | 80-200 yuan | 150-300 yuan |
| System maintenance | 30-50 yuan | 100-200 yuan |
Through the above structured treatment plan, most air pressure switch faults can be effectively solved. In case of complicated situations, it is recommended to obtain technical support through the brand's official customer service channels to ensure that the maintenance process is safe and reliable.
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