Check 1. Your blower fan works together with your heating and cooling units, but it's really a separate electrical system. The problem: You have a bad fan motor and/or bad start capacitor. Problem 2: Dirty air filter . Blog. Dirty outside unit. Unless this is a fuse problem, you will have to call a pro to trouble shoot the fan motor or the circuitry. The bearing make it possible for the fan to spin. You can also test the contactor with a multimeter. If the compressor isn't running but the fans work, the start relay or compressor might have failed. Refrigerant lines are what connect your indoor and outdoor units in order to cycle refrigerant and continue the cooling process. Reason #1: Fan is set to ON The fan in your AC system can run separately from the cooling component of your AC. A broken or damage fan blade can be dangerous if the system turns on while you are inspecting it. Check the control board for a blown fuse. However, the FAN on the AC unit outside will not … If you're signed up for a saver switch through your utility company, they may be temporarily locking you out during peak demand hours. 2. If the electrical contacts are burned out, the thermostat won’t work properly The fan motor should always be running when the compressor is on. Mid-August and temperatures are in the 70’s? Serving South Florida Since 1976. Your AC unit’s fan keeps the evaporator coil cool for efficient operation of the condenser. If your air filter is clogged, sometimes your AC won't turn on. First, keep in mind that when it’s extremely hot outside, you might be tempted to keep lowering the desired indoor temperature at the thermostat —but your AC will have a hard time cooling your home beyond about 25 degrees cooler than it is outside. 14.Noisy AC Fan. There are couple of possibility behind AC is not cooling but your fan is working . You can visually inspect the contactor for signs of damage. As the air conditioning system cools down, the blower fan pulls the warm air from inside of your home, runs it through the air conditioning system, and then blows the now cool air back out into your home. If that happens, it means your indoor unit (fan and evaporator coil) will continue to work, but without help from the outdoor unit, your AC system eventually loses its ability to produce cool air. If copper pipes coming in/out of inside unit do not have a temperature difference (one warm or room temp and the other colder) see if you can hear the compressor running under the fan- would be a deeper hum if you can hear it. 28 May, 2017. Look to see if ice has formed on the coils and, if it has, turn on the power and the fan to melt it. If the electrical contacts are burned out, the thermostat won’t work properly The fan motor should always be running when the compressor is on. If your system is running but you hear unusual noise coming from the outdoor unit, you might have a bad fan or a bent or broken fan blade. This portion is used almost all air conditioner units to help control various parts. If yes then toggle it to cooling mode. If your AC is running but is not cooling the house properly, you could be the victim of a variety of issues. Heat is absorbed at the inside evaporator coil in the summer, and then it’s released outdoors at the condenser coil. Air Conditioning and Cooling Systems - AC unit outside fan stays on, won't shut off! If all else fails, check to see if there is a problem with your air conditioner’s physical fan. But if it’s not very hot and your HVAC heat pump is not cooling, you probably need a service call. Finally, check and clean the outdoor compressor. Scenario A: Compressor works, but the fan does not spin. Posted By: Anthony Pascucci. This is a common reason why your AC is not cooling. Complaint: You hear a constant buzzing noise in your condenser, both when the unit’s running and when it’s not. Just as with a normal AC unit, refrigerant absorbs heat from one area to another. Refrigerant absorbs heat from the outside air and moves it indoors with the help of a reversing valve and multiple check valves. However, they work together as a team. Is your outside AC unit not running? When your air conditioner’s outside fan is not working, inspect the fan itself . Your furnace and air conditioner simply heat up and cool the air inside of them. If the compressor is running, but the fan motor is not running, the fan motor or the fan motor capacitor are likely at fault. Reason why an unclean outside unit hampers the working of your AC, it is important you understand how air conditioning works. A dirty air filter reduces airflow into your AC, causing several problems: AC struggles to circulate enough cool air to get your home to the desired temperature (e.g. Clean the condensate drain. Fan runs in Cooling mode. Usually, it results in your air conditioner running, but not cooling your home, but it can also keep your AC from turning on at all if it's bad enough! Before you scramble to phone to call a residential AC repairman near you, there are a few things you can do to get your air conditioner back up and running. SCHEDULE APPOINTMENT. Causes and Solutions. However, the fan may become noisy to the point of being uncomfortable. If your indoor unit’s fan is working: Please check if your AC isn’t set on fan mode. This could result in warmer air blowing from the registers when the AC unit isn’t operating. If the window AC compressor is not staying on, then the compressor is likely overheating. Carefully touch the pipes coming out of the outer unit, the small one could be Very Hot. To troubleshoot, turn off the system at the thermostat as a safety precaution. Condensing Unit - A condensing unit (or "condenser") is the boxy-looking part of a split AC unit that is outside. AC works great! Basically, both issues will cause your system to run constantly since it’s struggling to remove heat from your home. Perhaps the fan inside the furnace unit runs, but you aren’t feeling cool air coming out of your vents? Some AC units have a sensor that shuts down the system if it detects dangerous levels of internal pressure, which explains why your AC might be turning on and off a lot. It makes you wonder if the dog days of summer are behind us or if they’ll be back with a vengeance next week. Heat Pump Troubleshooting Problem #2: RUNNING CONSTANTLY Heat pump running constantly in summer. The same goes for dirt buildup on an outside unit’s condenser coils. - Thermostat will read AUTO/ON. We'll diagnose your unit and provide a fair quote for the air conditioning repair. Your blower fan is what pulls the uncomfortable air out of your home, sends it through the air conditioner or furnace, and then distributes it back into your home. If the compressor is running, but the fan motor is not running, the fan motor or the fan motor capacitor are likely at fault. If your air conditioner just can’t bring down the temperature to the number you plugged into your thermostat, there may be a few issues to investigate. Then the fan setting may be set to “ON” which just runs the fan 24/7—even when the air isn’t being cooled. It can be used as a heater but it is damaging to the unit if not operated correctly during winters. Clean or change the filter. Toggle navigation. You see, your outdoor unit’s job is to transfer heat from inside your home to the outdoor air. If that's not the case, then try the following steps: 1. In the summer, your heat pump might run constantly when your unit is struggling to reach a low set temp during those triple-digit heat waves. If … If your outside ac unit not turning on and you have confirmed that the power source is good, then the problem may be the electronic control board. What not to do: Modern air conditioners are technically advanced and not designed for do-it-yourselfers. Solution: Set the thermostat to AUTO. Fan blades are loose or out of balance; The copper lines from outside to inside are rubbing against something; The condenser coil needs to be cleaned; The air filter needs to be changed; The blower is going bad or out of balance; Refrigerant leaks, resulting in your air conditioning freezing up. If the setting is “on”, the fan will run constantly, even when the system isn’t cooling the air. Running the AC Fan By ... To get the most out of your home air conditioning unit, be sure to review your owner's manual and follow usage recommendations from the manufacturer. Wrapping it all up, running air conditioner when it’s cool outside has its pros and cons. 1. AC Not Cooling. Look for an Energy Star-rated unit if you are in the market for a new air conditioner, and a unit that has a SEER rating of at least 14. A defective electronic control board or control thermostat could prevent the window air conditioner from cooling. Outside exhaust fan isn’t running. While inspecting the fan, first check the bearings. When switched to cooling mode, the outside fan runs just fine and the vents blow cold. An indication that the control board is not working, is not running the fan or compressor circuit. As the title says, my heat-pump does not run the outside fan when I put it in heating mode, but my vents still blow warm air. Make sure you have all the information before you turn your AC on when it’s cold, or you might end up … During the summer months, the ducts in your attic and close to your walls can fill with warm air, resulting in the fan blowing hot air into your house. Packaged Units; Ductless AC Systems; Fan Coils; Gas Furnaces; Specials. AC Troubleshooting Guide to Fixing a Constantly Running AC Unit. On May 4, 2018 . Is your AC buzzing? If your AC is not cooling but runs: Turn off the power. These two parts work together to cool your home, but don’t always turn on and off at the same time. Because we are getting close to the hot months in Arizona, it is imperative to make sure your AC is up and running efficiently. Often, a noisy AC unit results from a dirty fan motor. I thought that the outside fan runs in … The average unit has a 500 watt fan, which uses almost as much energy over the course of the year as a refrigerator, resulting in a $50/month bill. DIY Ways to Fix an Air Conditioner. [Also read: 5 Common AC Leakage Problems & How to Fix Them] 3. How can you take care of your air conditioner’s outside unit? Heat Pump - Outside unit fan not running when in Heating mode, using only expensive auxiliary electrical heat. The blower fan in your air conditioning is a separate electrical system from the cooling unit. When troubleshooting why your central air conditioner is not cooling, here are the top four potential causes you should investigate: A faulty contactor will not allow voltage to be sent to the condensing unit, preventing the compressor and fan motor from running. Therefore, you may end up running your AC even more, to counterbalance the extra heat. Refrigerant lines. With a heat pump, the process reverses in the cooler months. Verify that the thermostat is switched to cool mode and has a cooling set point below the room temperature reading. My AC is Running, But it’s Not Cooling My House. 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