Check the electrical panel for a circuit breaker that has kicked out. He appeared for 3 seasons on HGTV’s “The Fix,” and served as MSN’s home expert for several years. This would indicate that the thermostat and the blower motor are operating, but the refrigeration system (outdoor compressor) is not working right or air isn’t circulating properly, usually because of dirty filters.eval(ez_write_tag([[250,250],'hometips_com-leader-2','ezslot_8',625,'0','0'])); A kinked refrigerant line, or a blower fan that isn’t running right can cause this, too. Note: Those with sealed bearings don’t. Air conditioners can create a lot of water because they remove moisture from the air. See How to Test and Replace an AC Run Capacitor, above. Blower Won't Work on Central Air. If you hear a pinging or popping sound coming from metal ductwork, this may be caused by thermal expansion or by air blowing past a loose flap of metal. If your unit is working overtime to cool air that’s escaping through holes in the system, you’ll notice a spike in your electric bill. Vacuum the interior of the condenser, and then flush it with a garden hose. HomeTips.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Rotate the blower pulley by hand, holding the belt in place but keeping your fingers from getting caught between the belt and the pulley. A: It’s the last thing you want on a sweltering summer’s day—a central air conditioning system that’s not blowing cold air. While Las Vegas is known for its hot summers, winter temperatures can drop below freezing at night. If the AC doesn’t turn off, it may be time to clean the condensing unit. If your compressor doesn’t have an overload button and you hear it humming or buzzing, poke a screwdriver or stick down through the top grille and try to spin the fan blades clockwise. We like this video because it shows how to clean the unit from the inside—not how to simply wash-down the coils from the outside. Blower Won't Work on Central Air. amzn_assoc_linkid = "fed726c60c88d738e7784c819bb73fbc"; Make sure it's plugged in. If the air handler doesn’t run at all, it may not be receiving power. The AC is on and running. Hey, if we didn’t answer you question yet, check the conversation board at the bottom of this page…lots of new answers and help there! AC air handler buzzing sounds. If your heating system’s temperature controls are working and warm air is being produced, it could be that your system is not moving the warm air to all your rooms. Do it gently so you don’t poke a hole. (You’ll be happy to know that it is cheap and easy to replace.). Turn on the AC unit and take a long, thin object (a stick or screwdriver will work fine) and use it to push the fan blades inside the compressor. Fans in the central A/C both pull air out of the room to be conditioned and have humidity removed and also push chilled air through the vents throughout the house. For more about filters, see How to Replace Furnace & AC Filters. Squealing sounds from a belt-drive air handler generally occur when the belt that connects the motor to the blower slips. First, make sure the problem is the capacitor and not the contactor. For information on furnace problems, please see Furnace Not Working. Replace the cover and wait 3 or 4 minutes, and then try the system again. The video below gives you a little more information about how to get the top off the compressor: eval(ez_write_tag([[336,280],'hometips_com-large-mobile-banner-2','ezslot_7',151,'0','0'])); 1 Turn off the power to the AC unit. Water can also puddle around the unit or flood the area. If the wiring appears to be okay, buy a new thermostat and install it according to the instructions. You can almost always conclude that the capacitor has failed. Try turning on the thermostat and adjusting the temperature so that your HVAC is turned on. If it is "Off," flip the switch back to "On." Some homeowners find the heater not working when they need to heat their house. amzn_assoc_tracking_id = "widget05-20"; The problem could be a simple issue like an incorrectly programmed thermostat or a clogged filter. amzn_assoc_ad_type = "smart"; If your central air conditioner will not cool but you can hear it running, it may just need to be cleaned. If they aren’t working properly, call a trained technician. If the fan blades are bent or dirty, straighten them out and/or clean them. 2 Rake leaves and debris away from the outdoor condenser. A Blocked Outdoor Air Conditioning Unit. Reduced air flow, whether caused by dirty filters, a dirty coil, dirty squirrel cage blower, or a broken fan motor can cause the coil to freeze up, blocking air flow. When these wires break, erode or are damaged in any way, air conditioner service is impaired. Turn the circuit breaker all of the way off, then flip it back to “ON.”. The only thing that comes on in the house when you turn on the thermostat is the fan relay and fan in the air handler or furnace. If the furnace makes rattling noises when it runs, be sure the cover panels are screwed on tight. The AC compressor is the heart of your air conditioning system. Central Air Conditioning Unit Fan Not Working. A Blocked Outdoor Air Conditioning Unit. Is your AC not working? 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