A electrical malfunction. This article is a little different and is less common than the other problems. We refer to these malfunctioning air conditioners as “Zombie Air Conditioners” because no matter how hard you try to switch them off, they won’t die. I have a 2000 Honda civic ex. If the condenser is obstructed, then it can’t efficiently transfer heat out of your system. #326306 This is usually the case for air conditioners with rotary dial thermostats. Check out this post to learn about some other airflow problems you may run into as a result of an inappropriately-sized air conditioner. You should consider purchasing a standalone thermostat and moving it throughout your home during the evenings to see what the actual temperature inside your home is; the wall-mounted units that control your air conditioner can be inaccurate. The next day I noticed that the fan was still running on it and it was blowing air but not cold air. If you live in the Phoenix metropolitan area, our 40-point annual checkup will keep your air conditioner in top condition and alert you of any potential issues well in advance. Even if your thermostat is relatively new, you could be having other thermostat problems. “Temperature control” is another name for the thermostat. If you have a newer thermostat that uses an electrical temperature sensor, this wouldn’t be an issue with your thermostat. To turn it off, simply change your thermostat setting to “auto.”. The fan of the air conditioner works together with the heating and the cooling system of the air conditioner. Double-check the thermostat and make sure the fan is not set to ON, and that it still runs when switching it to AUTO or OFF (if your thermostat has an OFF setting). Sometimes, a faulty electronic control board might be the reason why your air conditioner keeps running when turned off. If the condenser fan keeps running then the contacts on your contactor are either welded together or have an insect or something else not letting the plunger function as designed. Contact ABC to have a service specialist come out and make sure your AC unit is healthy enough to keep you cool. 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. Fan keeps running at mid-speed by: TN-Goose My Condenser fan is also running while the indoor thermostat is switched OFF. The unit will never kick off and continue to pour out the coldest air and freeze up the unit. The part of your air conditioning system which is outside should have 8 to 12 inches of clearance from shrubs and brush. So, you turn off your air conditioner and head outside to take advantage of a beautiful afternoon. Diagnosing and repairing this problem takes extensive knowledge and training, so you’ll need to contact a licensed professional. Depending on indoor and outdoor conditions, this could mean that your system turns on and off every 5 to 10 minutes. When an air conditioner is not in a cooling cycle, the contactor blocks the flow of electricity to the unit. As a safety measure, all AHWA employees experiencing COVID-19 symptoms will be required to self-isolate. Routine preventative maintenance will help you avoid having an electrical part go out at the least convenient time, as a trained heating and cooling technician can often detect and address most small problems before they become major ones. If your blower fan is continuing to run after the system has already turned off and you made sure your thermostat isn’t set to the ‘on’ position, then you’ll want to try and pinpoint the issue. Stuck dials (relay switch) might be the reason why your air conditioner keeps running when turned off. You can see that the temperature inside is colder than … If you’re getting a new thermostat installed, your specialist will likely put it in a commonly used room on an interior wall. Air conditioner is turned off but fan keeps running. The well-being of our employees and customers is a priority for us during these tough times; therefore, AHWA is taking extra precautions due to the COVID-19 outbreak. TELL ME MORE. Source. In the HVAC industry, when an air conditioner keeps running when turned off, techs call them “zombie air conditioners.” You can try to switch it off manually. Problem: You are running your air conditioner and even when your system cools to the set temperature, the outdoor unit continues to run and just won’t shut off.The indoor unit may freeze up into a solid block of ice. © Copyright 2020 ABC Home & Commercial Services All Rights Reserved. central air conditioning unit inside keeps running and will not shut off and blowing out cool air. While this is arguably a better situation than having an air conditioner that won’t turn on, it’s still wasting energy and money. Your technician will likely also clear the condensate drain and clean your unit inside and out. Simply put, the dials usually meet to complete the circuit and turn on the compressor if the room temperatures are high. But it won’t (or it takes up to an hour to do so). If your PCB is broken, the only viable option is to get a new replacement. sometime, when I restart the system, it only works for 5 minutes then the condensing unit shut down but the blower fan keeps running. If the room temperature is above your preferred settings, the cooling system (electronic part) takes note of this and commands the fan to run and suck in the room’s warm air for cooling. Do you want to make sure your AC unit doesn't go out in the dog-days of summer? Now, we’ll be getting into the techy side of things as we try to get to the root of the problem. Learn how to fix it today. We mentioned earlier that there are a couple of things that turned your air conditioner into an electronic zombie. 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. However, most older thermostats have a mechanical switch which is either a bimetallic strip with mercury or a magnetic switch. 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. This action removes control voltage to the condenser. However, before you start shopping for a new thermostat, you can try recalibrating your thermostat, which you can do yourself or ask a professional to do for you. 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