And if none of those are the problem and you’re sure it’s not an improper setting on the thermostat that’s causing your AC not to turn back on, then I’d suggest you have someone come out and look at the system because that is not normal operation and a part may be malfunctioning or starting to fail and the problem will only get worse. Why will my air conditioner turn on and off? Another probable reason that why your furnace only runs for a few minutes and then shuts off is a defective switch.The draft inducer motor air flow through the burner should close a pressure switch to indicate the board that accurate air flow is present and the ignition process can continue. Electrical problems are not only difficult to diagnose but diagnosing an electrical problem can be dangerous for even the most knowledgeable homeowners. If the pipe that’s freezing over is the refrigerant line, it sounds like you may have a leak or micro leaks. Sometimes when I unplug the charger it will immediately turn off as well. I’ve updated a few solutions to provide more information than to just call an HVAC company. Since hurricane Sally power has been restored in my home but now my a/c keeps “short cycling” inside the home? Air Conditioner Turns On and Off Repeatedly. Below, we’ll look at both the easy fixes and the bigger problems you need to consider. Remember, the blower fan might run a few more minutes after the cooling system has turned off. But, the cycling still happens every time there’s heavy rain. If the thermostat is not sensing the temperature accurately and communicates misinformation, it will signal the air conditioning system to start and stop frequently. I figured bad fan motor, so I replaced it with a Dayton replacement fan motor with the exact same specs as the one above and a new capacitor matched to the motor by the dealer who sold me the motor. Home » Frequently Asked Questions » Why Does My Air Conditioner Turn Off After About 15 Minutes? We can diagnose your air conditioner’s problem, get it running, and make sure it’s doing a good job of cooling your home. Any additional thoughts for an AC that short cycles (30 seconds on, 5 minutes off – air handler stays on for an additional minute or two) BUT after maybe 30 minutes of this decides to stay on and work right? Check your outside AC unit for the presence of ice on the refrigerant line. The inside fan comes on and runs for a few minutes then the outside unit will kick on. AC is supposed to blow cold air—never warm or hot air. Short cycling wears out the outside unit’s compressor. Always try the easiest / least expensive solutions first:1) Change the air filter2) Thermostat Issues (Battery, wiring…)3) Clean Condenser Coils4) Thermostat Location5) Clean Evaporator Coils6) Call repair man for service. 45 min.– cleaned filter, cleaned coils, changed out the capacitor, switched thermostats. If I let it run it’ll freeze the pipe so I know the condenser is working. Trouble shooting: Turned Fan ON at thermostat - fan/blower ran 60 seconds, then shut off Jumpered Fan ON (thermostate wires R to G) - fan ran 60 seconds, then shut off I have had my a/c unit recently charged with freon last week, since then we left for 4 days and when we got back I noticed my outside unit turns on and off within 2-3sec. The fan used to shut off a few minutes after the compressor went of, but now the fan seems to run 24x7. #213 Las Vegas, NV 89118. Fan runs 30 seconds and shuts off. If you’re replacing the entire condensing unit and running into problems then I’d suggest you have an HVAC technician inspect your AC system. S/he expects you to be able to find someone serious and professional that will bring you the solutions an peace of mind because we don’t know how capable you are to handle the mirada of possibilities why an a/c system fails besides, they’re several systems wired differently. In those cases you may have to buy a brand new unit..Call the pros and make sure they r HVAC techs, not apprentices!!! Pressure Switch. Solution: Refrigerant leaks can be dangerous, call a local HVAC company to find and fix the leak. If you notice your thermostat screen is blank or fading it may be low on batteries and losing power intermittently. I went to AC school 8yrs ago, questions are welcome. Could it be the electrical? It generates the pressurized conditions through which the refrigerant absorbs and dissipates thermal energy, cooling your home. Thank you! Blower does not come on.My AC tech, via text, had me remove the float in the air handler to see if it would come on and stay on, it did not.We replaced the air filter and thermostat, same issue.Drain line appears to be clog free as water is dripping from it.It comes on for exactly 3 minutes, I set a timer, then kicks off. When it's not too hot out it works most all the time. A system that is too large won’t have an appropriate refrigerant cycle and will face numerous problems, like cooling your home too quickly and then turning off shortly after it turns on. There are evaporator coils inside the air conditioning system. 24/7 Emergency Service Available! Depending on how old your unit is and how expensive the repairs are, you may want to consider replacing it instead of dropping more money into repairs. 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