What is the problem with the high-pressure gauge shaking?
3 Answers
When the high-pressure gauge of a car's air conditioning system shakes, it is usually due to internal issues with the compressor. Common causes include problems with the one-way valve plate, hydraulic shock, or rapid refrigerant charging. Replacement is often the only solution to eliminate the issue. Another possible reason is unstable high-pressure output from the compressor. You can use an air conditioning pressure gauge to check if the high-pressure gauge is fluctuating. If it is, the compressor is likely damaged. Here is some additional information: Air compressor: In car air conditioning systems, the air compressor is mainly used to regulate its start-stop state. By adjusting the pressure in the air storage tank, the air compressor can be stopped for rest, which helps maintain the machine. During factory debugging of the air compressor, the pressure is adjusted to the specified level based on customer requirements, and a pressure difference is set.
Recently, when I was driving my old car, the voltmeter suddenly started shaking, which made me sweat with anxiety. This is usually related to sensors or the electrical system. If the sensor connector is loose or contaminated with oil, the readings become unstable, causing the needle to dance. If it still shakes after cleaning, it might be due to unstable voltage output from the alternator or interference caused by corroded battery connections. It's best to check the voltage with a multimeter; ideally, it should operate stably between 13 to 15 volts. Ignoring this issue could lead to headlights flickering at night, increasing the risk of an accident, so pull over and inspect it immediately. If the problem persists, tow it to a professional shop and have a mechanic scan for fault codes with a diagnostic tool to resolve it once and for all.
The erratic movement of the high-pressure gauge worries me because it indicates potential safety hazards. Last time I drove a long distance, the needle was jumping around, and upon inspection, it turned out to be due to aging sensors or poor wiring connections. Common causes also include generator issues; significant fluctuations in output voltage can cause the gauge to fluctuate. If left unrepaired, the vehicle's lights may flicker, or the battery may fail prematurely, increasing the risk of an unexpected breakdown. It's recommended to check the sensor plugs and grounding wires after parking and turning off the engine, then observe any changes upon restarting. Minor issues can be fixed by tightening or cleaning yourself, but for major fluctuations, it's best to have a technician run tests. Safety comes first—never delay addressing such issues on the road, as the consequences could outweigh the costs.
