Check out this video on how to clean your RV air conditioner coils. They can also lead to your high-pressure switch circuit tripping. Inspect the condenser and evaporator coils: Dirty condenser and evaporator coils are another common culprit of air conditioners not blowing cold air as they should.Checking and cleaning the filters every two weeks will help keep your AC blowing cold air. Check the air conditioner filters: A dirty air filter can restrict airflow and cause the air conditioner to not cool properly.Try parking your RV in the shade, keep doors and windows shut, and don’t use heat-producing indoor appliances like your stove to help keep your RV cool. If your vehicle is poorly insulated, has a lot of windows, is located directly in the sun, and so on, it can be difficult for even the best air conditioner to keep the vehicle cool. Check the outside temperature: On extremely hot days, it can be difficult for your RV AC to keep up, especially if your RV has a high heat gain.Check the Thermostat: The first thing to do is to ensure that your thermostat is set to the right temperature and is in the ‘cool’ mode.If your RV air conditioner turns on but isn’t blowing cold air, it typically needs proper maintenance performed on it, or it simply can’t keep up. If all the above checks out, you will need to contact a qualified service technician to service the unit. This may seem like a no-brainer, but make sure the temperature on the thermostat is low enough for the unit to kick on. If you find a bad one, you will need to contact the manufacturer for a new one or find a suitable replacement. You can test your capacitors using a standard multimeter. Often when you hear a humming sound but your fan won’t kick on, it’s due to a bad capacitor. Your RV air conditioner unit typically has two capacitors – a run capacitor and a start capacitor. In some models, it’s as easy as turning the RV’s power supply off and back on. Refer to your owner’s manual for steps to reset the circuit. If your AC model has a high-pressure switch safety circuit, it could have been tripped due to abnormal conditions (dirty filters, etc.).
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