We have a setback thermostat that is set to cool, fan on auto, and "run program". All the lights on the front panel began flashing. Check the control panel to see if this mode is active. While this is a relatively common issue, it should not go unchecked. This then causes the air conditioner to overheat. He … When in Energy Saver mode, the unit will run until the desired room temperature is reached. When you turn off the Sharp portable air conditioner and start it again without allowing three minutes to pass, the air conditioner's internal compressor might shut off after a moment as a safety measure, which will cause the unit to stop working. The fan on my Trane XL90 runs continuously even when the air conditioner shuts off. Please find below the reasons why this might be happening Problem with the timer - Sometimes, the timer in your air conditioner may be defective. Home air conditioner starts but shuts within a few seconds with the inside fan running when the outside unit stops. Unplugging it and replugging it in does not solve the problem. If the air conditioner is set to Energy Saver, this is likely the cause of the unit shutting on and off. There’s a chance your thermostat is malfunctioning or doesn’t have enough dead-band hysteresis built into it, so it is touchy and reacts too quickly to the cooler temperature. The unit won't allow you to turn it back on until approximately five minutes have passed. Short cycling can cause issues like: Increased energy bills; Wear and tear on your system; Shortened AC lifespan; There are a few reasons that your AC can short cycle, but 4 of the most common are: An oversized AC system; A refrigerant leak; A dirty air filter A second sort of "short cycling" of the compressor also suggests that diagnosis and repair are needed: if an air conditioner or heat pump compressor runs for a very long time (i.e. This cooling cycle runs for a few minutes until the temperature is right; it then shuts down to save energy and prevent the air from getting too cold inside. A second sort of "short cycling" of the compressor also suggests that diagnosis and repair are needed: if an air conditioner or heat pump compressor runs for a very long time (i.e. “Short cycling" is the official term for when an AC turns on and off every few minutes. This causes the AC to run longer to circulate enough cool air to achieve the temperature you want. Once that temperature has been reached, both the compressor and circulation fan will shut off. My ac unit turns on for a few seconds, then shuts off. 2) Dirty condenser coils: The condenser coils are in your air conditioner… It is indicative of something being wrong with your air conditioner. Tried various front … Could be a problem or could be normal. Fans draw air over the coil and force the air through the ducts that lead to the rooms in your house to lower the overall temperature. I'm not sure if the actual outside unit kicks on, but I can hear the blower turn on inside. Yes, this is a very common situation. Change the filter and see if that helps. When an air conditioner (AC) starts and stops in quick cycles, and doesn’t run for long periods, this is known as short cycling. I had a repair man come out a month or 2 ago and he replaced the blower motor and capacitor. 1) Dirty air filter: Dirt on the filter impedes air flow. The lights flash and the unit makes a beeping sound every 5 seconds when it is plugged in. Then it suddenly shuts off after just 5 seconds. Shuts right back off.