Before replacing the compressor, be sure to check more commonly defective components—particularly the overload protector and the compressor capacitor. Window AC not cooling: Troubleshooting. When the air temperature rises above a … There are several possible problems when a window AC’s not cooling. A simple procedure can help determine which of these conditions is responsible. The compressor might be defective. The main control board regulates the voltage to the compressor and the fan motor. By creating an account you agree to the Hunker, When you turn on your window air conditioner. Either way, your best bet is to call a service pro to diagnose and repair the problem. If you don't hear the rumble or feel any vibrations, something is wrong, but the problem may be simple to fix. Hunker may earn compensation through affiliate links in this story. Chris Deziel is a contractor, builder and general fix-it pro who has been active in the construction trades for 40 years. If it is not possible to clean the air filter, replace it. There are several possible problems when a window AC’s not cooling. Check the settings on the front of the unit. If the compressor is defective, it should only be replaced by a licensed technician. If the thermostat is defective, the thermostat may not cool properly. If you want the air conditioner to blow cold air, make sure the controls are properly set. Close your windows when the air conditioning is running. One of the most common reasons for a window air conditioner to fail to deliver cold air is incorrect mode selection. Enter model number to search for the required part specific to your product, Browse our parts categories to select from a variety of parts for your product. A circulation fan blows this cold air out of the front of the unit. When you turn on your window air conditioner and select "Cool," the condenser switches on and circulates refrigerant through a series of coils. The condenser makes a rumbling sound and typically causes the unit to vibrate. The thermostat monitors the temperature of the air. If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. An avid craftsman and musician, Deziel began writing on home improvement topics in 2010. The fan selector should be set to "Auto." If they are dirty, clean them with a vacuum cleaner. Room air conditioners are not designed to cool … If the condenser coils are dirty, clean them. If no air is coming from your air conditioner, check the circuit breaker, which may have tripped. The most common cause of window air conditioners not blowing cold air is a lack of adequate air flow. This should make the condenser start, and you should start to feel cold air. Blinds, curtains, furniture and chairs can all block air flow out of the air conditioner and negatively impact the appliance's cooling effect. He worked as an expert consultant with eHow Now and Pro Referral -- a Home Depot site. If they have a coating of ice, leave the air conditioner off until the ice melts. The thermostat monitors the temperature of the air. It's against the law for an unlicensed person to service the refrigeration system in an air conditioner. Shipping all 7 days! It could be anything from a simple case of a bad extension cord to a defective compressor, to a coolant leak.. When the air temperature rises above a set point, the thermostat activates a switch to provide power to the fan and compressor. We've got millions of parts, hundreds of brands, and thousands of step-by-step videos— everything you need to find it, fix it and finish the job right. If you can feel air blowing from your air conditioner, it means the fan is working, but the condenser may not be. It may be dirty, and if so, clean it with soap and water or buy a new one. After correcting this setting, turn the thermostat to its maximum cold position. Air conditioner cycles on and off too much or does not cool room in cooling mode The air conditioner is not properly sized for your room. If the thermostat does not have continuity while the air conditioner is set to cooling, replace the therm... ostat. In the first leg of its journey, the refrigerant gets compressed in the condenser coils. If LEDs on the front panel are illuminated, indicating the unit has power, the problem could be a stuck fan blade, or it could be a problem with the control panel. It's also possible the condenser motor isn't working or isn't getting power. If the main control board fails, some components will not function properly or will not work at all. However, when the unit is properly set to "Cool" but it doesn't blow cool air, possible problems include low refrigerant, dirty air filters, and coil freeze-over. If you don't feel cold air even when the condenser is working, the coils may have frozen over, the filter may be dirty or the refrigerant charge may be low. This may take a day or more. If the thermostat is defective, the thermostat may not cool properly. While you're at it, go outside and clean the exhaust grid with a garden hose. The condenser coils dissipate the heat as the refrigerant passes through the coils. Join Repair Clinic's VIP email list for 10% off, plus other discounts and tips! This greatly reduces the cooling capacity of the air conditioner. If it still doesn't blow cold air, the refrigerant charge may be low or the condenser may have a worn seal. Check the condenser coils to determine if they are dirty. A DIYer by nature, Deziel regularly shares tips and tricks for a better home and garden at Hunker.com. Check the cooling capabilities of your room air conditioner. Common solutions for: Haier Air conditioner compressor won't run . However, this is not usually the case. As debris builds up on the coils, the air conditioner will become less efficient, causing the air conditioner to work harder to cool down. Already ordered? It could be anything from a simple case of a bad extension cord to a defective compressor, to a coolant leak.. Refer to your air conditioner’s wiring diagram for more information.). Problems with the condenser and with refrigerant levels need to be fixed by a service pro, but homeowners can usually take care of dirty filters, freeze-over and power problems themselves. If the air filter is clogged, air cannot flow properly through the air conditioner. We carry more than 4 million parts from over 175 major brands, so chances are, we've got the part you need. To determine if the thermostat is defective, set the air conditioner to cooling and then use a multimeter to test the thermostat for continuity. Give the plug a push to make sure it's seated in the socket. Look inside the the housing with a flashlight to inspect the coils before you replace the air filter. In addition, if the air filter is clogged, the evaporator coils will frost over. To determine if the thermostat is defective, set the air conditioner to cooling and then use a multimeter to test the thermostat for continuity. To remove debris from the air filter, try cleaning the filter. Midway along its path, it passes through a tiny aperture and enters the evaporative coils, where it turns into a gas. Turn the air conditioner back on after cleaning the filter and deicing the coils. At this point, you need to call a licensed service professional. One of the most common reasons for a window air conditioner to fail to deliver cold air is incorrect mode selection. Start doing it yourself with the confidence that comes with 100+ years of experience. (Note: Some thermostats may also control a heater and, as a result, will have three terminals. He has degrees in science and humanities and years of teaching experience. Control boards are often misdiagnosed; make sure to check more commonly defective parts first before replacing the control board. In a properly working air conditioner, a fan will draw air over the evaporator coils, where it is cooled, and … If it's set to "On," it will blow air even if when the condenser isn't working, but in the "Auto" position, it will only come on when the condenser is working. Email. Repair help > Window Air Conditioner repair > Window Air Conditioner symptoms Window Air Conditioner: Running but not cooling If the window air conditioner's compressor and fans are running but the air conditioner isn't cooling… The transition from a liquid to a gas sucks heat out of the air, and as a result, the evaporative coils turn cold.

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