1. Observe the liquid crystal display of the gas meter: the liquid crystal display is 0.00, indicating that the remaining gas is insufficient. You can re-insert the gas card after purchasing gas, pull it out after hearing the "drip" sound, and replace the battery after waiting for the gas meter not to display.
2. Check whether the battery is charged: the gas meter battery is charged, the LCD screen displays LO, and the valve is closed. After plugging in the fuel card, there is no response. Three brand-new 5th batteries of the same brand can be replaced.
3. Check whether the valve in front of the instrument is open: if air leakage is found during replacement or security inspection, the staff will close the valve in front of the instrument and cannot open it by themselves. They should immediately call the gas company's customer service hotline 95 158 to make an appointment for a repairman to come to the house for treatment.