There are a couple of reasons your air conditioner keeps running when turned off. By regularly changing the filter, you reduce a lot of the burden on the system. Source. Building materials like concrete will do a better job of retaining heat even after the sun sets, which may prompt your air conditioner to stay running. You have no idea just how many of these air conditioning problems could be avoided if people paid extra attention to their air conditioners. Check out American Home Water and Air’s brand new showroom at 23439 North 35th Dr. #7, Glendale, AZ 85310. Then all of a sudden it started blowing full blast, while the recirc, ac, rear defrost button lights all came on and were flashing...then it all turned off.... - 1996-2000 Honda Civic Don't see any bad wiring connection. This action removes control voltage to the condenser. This typically happens because of: While some of these problems require professional assistance, there are some reasons this might be happening, some of which you can resolve on your own and others which you are better off having heating and cooling specialist address. My air conditioner unit outside keeps on turning off and the fan in the house keeps on running. The PCB is likely to be at fault if the fan and compressor are persistently running after the ideal temperatures are attained. Be sure that the thermostat remains OFF so that your air conditioner’s internal circuit breaker can reset. If so, your switch is set to manual override, or “always running” mode. Many air conditioning problems, including AC units that freeze up, happen because homeowners don’t properly maintain their systems, or don’t realize what’s really involved. The truth is, it can be perfectly normal. Your air conditioning unit is a system of circuit boards, wires, fans, and many other components that work together to make your home a habitable place. All furnaces have either a fan relay or a control board to cycle the fan on and off as needed. These are the three components you need check: If everything seems fine but you’re still experiencing this problem, then your air conditioner is in grave danger. After you’ve ensured that the settings are correct, contact your trusted HVAC technician to troubleshoot further and resolve the issue. 2. To keep your air conditioner working in optimal condition, make sure the coils and fins on the outside of your air conditioning unit are kept clean and clear of leaves and other debris. While the temperature outside of your home may cool down during the evening, whether or not that translates into a decreased need for cooling inside is another question. They’re mainly responsible for the automation of air conditioners. One for the upstairs and one for the downstairs. While you’re at it, use your multimeter to check the relay board and other components of your air conditioner’s Electronic Control Board. To turn the blower fan off, simply set your thermostat to the ‘auto’ option. We're going to be honest with you: this problem could be caused by a LOT of different things. For example, the temperature in your home may constantly be rising above what you’ve set on the thermostat for any number of reasons. 75251 never stops running even if you turn the unit off. temperature on thermostat stays … A dirty or clogged filter makes your air conditioner work much harder. Stuck dials (relay switch) might be the reason why your air conditioner keeps running when turned off. The cooling system is the main component that is responsible for temperature regulation. If you have a newer thermostat that uses an electrical temperature sensor, this wouldn’t be an issue with your thermostat. You can check to see if this is your problem by simply pulling out a level and placing it on your thermostat. How can I fix this? This is usually the case for air conditioners with rotary dial thermostats. I have a 2005 Trailblazer ext lt 5.3 litre My air conditioner has been running great. You can see that the temperature inside is colder than … Learn how to fix it today. Just as the name suggests, this is the control center of your air conditioner. However, most older thermostats have a mechanical switch which is either a bimetallic strip with mercury or a magnetic switch. Make sure it’s on and in good working condition, Clean your air conditioner (especially the air filters), Inspect the Electronic Control Board for any signs of short-circuiting (black traces and burnt smell). When an air conditioner is not in a cooling cycle, the contactor blocks the flow of electricity to the unit. However, if your thermostat isn’t level it could affect the way the mercury bulb is tilted. It will cool to the temperature set and shut off but the fan 1. The best approach is to open your air conditioning unit and try to check if the sensor is broken or disconnected. Do you want to make sure your AC unit doesn't go out in the dog-days of summer? A electrical malfunction. Now, let’s go into a bit more detail about each of these scenarios. © Copyright 2020 ABC Home & Commercial Services All Rights Reserved. Even if your thermostat is relatively new, you could be having other thermostat problems. A broken or faulty thermistor might be the reason why your window air conditioner keeps running when turned off. Your technician will likely also clear the condensate drain and clean your unit inside and out. Thermostats should be installed in parts of the home that aren’t affected by drastic temperature changes. Fan still blowing after a few minutes? Efficiency and sizing is a big deal when it comes to choosing the right air conditioner for your home. The term “undersized air conditioner” means the room is too big for the air conditioner (air input is more than output). Once you set your preferred temperature, the information is taken in by the cooling system (Electronic Board Control) and relayed to other components in AC. Aside from having an air conditioner that simply won’t turn off, other signs that indicate your thermostat is malfunctioning include a thermostat display that is unresponsive or unlit, a unit that won’t turn on and a discrepancy between your room temperature and the temperature on the thermostat. I rarely if ever use the upstairs unit because the master bedroom is downstairs and no one lives upstairs. It’s more confusing if your thermostat is functioning well, and everything is working fine (at least on the outside). Broken Relay Switch or Short Circuit: If only the fan is running, there may be a broken relay switch preventing the settings you enter on the thermostat from being sent to the fan. Depending on indoor and outdoor conditions, this could mean that your system turns on and off every 5 to 10 minutes. Air Conditioning and Cooling Systems - A/C Fan keeps running - Wont turn off - My ac fan keeps running. While this is arguably a better situation than having an air conditioner that won’t turn on, it’s still wasting energy and money. There’s nothing quite as frustrating as having problems with your air conditioner because when something goes wrong it can quickly put you in an uncomfortable (and sometimes costly) bind. See the steps for checking these items above. Although your fan never shuts off, your heating and air conditioning still works fine. However, if they’re stuck, the compressor will keep on running even after the ideal temperatures are attained (air conditioner switched off). Changing the filters can help lower your unit’s energy consumption between 5 to 15 percent and extend the life of your air conditioning unit. 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