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How to deal with air pressure switch failure

2025-12-11 17:22:25 mechanical

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

How to deal with air pressure switch failure

Fault phenomenonPossible reasons
The device frequently reports error E5/E8 codesThe air pressure switch has poor contact or is damaged.
Automatically shut off after ignitionThe wind pressure signal is not fed back to the motherboard
The exhaust fan is running but the unit is not workingThe 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 itemsOperation modenormal value
Switch continuity testMultimeter resistance measurementShould be conductive (0Ω) when triggered
Stress response testingUse suction and blowing to simulate wind pressureThere should be an obvious "click" sound
Voltage detectionMeasure signal terminal voltageTypically 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

PlatformHigh frequency problemsolution
ZhihuAir pressure switch false alarm faultCheck whether the smoke exhaust resistance exceeds the standard
DouyinDIY replacement risksIt is recommended to contact professional after-sales service
Baidu TiebaAccessories purchasing channelsOfficial 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 itemsMaterial feeLabor cost
Routine testing0 yuan50-100 yuan
Replace switch80-200 yuan150-300 yuan
System maintenance30-50 yuan100-200 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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