If they are faulty, they may not shut off your AC when your inside temperature has reached the appropriate level. The fan switch on the thermostat is in the auto position, not the on position. If your AC just won’t turn off, give USA Home Improvement a call on (844) 468-7244. Air Conditioner Temperature Control Board, Frigidaire Air Conditioner Troubleshooting, Whirlpool Air Conditioner Troubleshooting, Kelvinator Air Conditioner Troubleshooting, Westinghouse Air Conditioner Troubleshooting, Magic Chef Air Conditioner Troubleshooting, KitchenAid Air Conditioner Troubleshooting, Panasonic Air Conditioner Troubleshooting, Hampton Bay Air Conditioner Troubleshooting, Montgomery Wards Air Conditioner Troubleshooting, Friedrich Air Conditioner Troubleshooting. if i turn the thermostat to COOL and set it for 55, the fan keeps going and the thing out in the back yard doesnt turn on if i turn off the breakers at the fuse box, it turns off, of course if i turn off the switch attached to the unit in the basement, it turns off. 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 … Outside in the unit is a relay, that is used as a motor starter. The thermostat monitors the temperature of the air. If your thermostat is not working correctly, the unit doesn’t know to turn off even when the temperature is reached. Still heard the electrical sound from the unit outside and realized the thermostat was still ON. Dirty condenser coils – Another cause of this could be the condenser coils. Step 1 Turn the thermostat up to a temperature at or near the outside temperature. 2) Condensing Unit Frozen Wont Turn Off – The other possibility for your problem is the thermostat wires are bad somewhere. You tried turning the thermostat to the off position, nothing works. If it is, there’s a good chance that the thermostat may need replacing. However, this is almost never the case. The temperature control board provides voltage to the fan motor and compressor. An air conditioner that won’t turn on isn’t entirely uncommon — and there are quick and easy steps you can take to figure out why your system is experiencing trouble. This problem may be periodic. Already ordered? If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. If the condenser coils are dirty, clean them. Your furnace and air conditioner simply heat up and cool the air inside of them. iMarket Solutions: Dedicated to Contractor Success. Offering services to Willamette Valley for more than 50 years. Running the AC last night and the unit outside ended up making a loud electrical sounds like a rock was bouncing around the fan. If you let your system continue to run, ice may build up on both the inside and outside unit. When the air temperature rises above a set point, the thermostat activates a switch to provide power to the fan and compressor. With a voltmeter, check across the low-voltage coil. Common solutions for: My AC Won't Turn Off. The thermostat reaches the desired temperature, the indoor unit shuts off, the air stops blowing, but the outdoor unit keeps on running. The temperature control thermostat provides voltage to the fan motor and compressor. July 15, 2018 Cooling The most common reason that your Air Conditioner fan won’t turn off is because a stuck relay keeping the circuit closed. The condenser coils dissipate the heat as the refrigerant passes through the coils. Your AC won't turn on until you clean out your drains, and … Make sure the heater or AC is turned off, and wait a few minutes after you’re sure. If it’s not the relay, your thermostat likely has a shorted cable or needs to be replaced. It continues to run and the lines eventually get ice on them. I've been searching around and saw that in most cases, either the inside or the outside unit won't turn on, but I have not found a case where both won't turn on. If there is a problem with the control board, it might not stop providing power to the 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. The easiest solution is to turn the temperature of the thermostat below the current room temperature by at least a several degrees. Tags: Air Conditioning Repair, Springfield Here are a few of the things that could be causing your AC to run constantly. But the opposite situation is also a problem: when your air conditioner comes on… and it won’t turn off. 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. Why won't your HVAC fan turn off? Keep in mind, you're not just cooling the air, you're also cooling the contents etc. My outside AC unit won't shut off when the tstat goes off. Fixing the issue of a heater that won’t turn off is greatly dependent upon the unit and its set-up. However, this is almost never the case. My central air conditioning unit just keeps running and won't turn off even when I raise the thermostat. Check across the fan terminals. 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. If there is an air conditioner, remove the screws to the control panel and pull it off. If you are certain that all of the other components are working properly, replace the relay board. Our HVAC experts will be right over to check your AC unit and repair it as soon as possible. Stuck contactor in outdoor AC unit (most common) Over time, the contacts can … In the heating mode (if it's a heat pump) it could eventually shut off on … Start doing it yourself with the confidence that comes with 100+ years of experience. There are several things that can cause your air conditioner outdoor unit to continually run. We carry more than 4 million parts from over 175 major brands, so chances are, we've got the part you need. You eventually shut off the outdoor unit by turning off the circuit breaker. Air conditioner is turned off but fan keeps running. AC unit won't turn on: both inside blower fan and outside fan unit won't turn on. Refer to your air conditioner’s wiring diagram for more information.). 1. The relay board provides voltage to many of the air conditioner components, including the fan motor and compressor. That takes time. This will likely cause it to run constantly as it tries unsuccessfully to exhaust the heat. If the outside unit still isn't running after you try these steps, contact Rescue Air Heating and Cooling immediately. As debris builds up on the coils, the air conditioner will become less efficient, causing the air conditioner to work harder to cool down. If the thermostat is defective, it may cause the compressor to run continuously. What Causes an AC Unit to Not Shut Off? If this switch is turned off, the inside AC unit may freeze, causing the entire AC system to shut down. There are a couple different causes of this problem, so call our Springfield air conditioning repair technicians at Comfort Flow Heating is you’re having any problems with your air conditioning system. When your HVAC blower never stops running, your first stop is the thermostat. If you are certain that all of the other components are working properly, replace the temperature control board. If the current temp shows greater than the set temp (or it doesn't show the current temp), but you feel like the AC is running too long, it may be that the AC needs to cool off the whole house, especially the area around the thermostat. I then turned the thermostat to OFF and the sound outside then stopped. ), Air Conditioner Temperature Control Thermostat. Here are the most common reasons your AC compressor won’t turn off – and the parts. If that fixed things, awesome! Turn off the compressor at the disonnect switch and then tear into the outside compressor, find … If your air conditioner isn’t turning off, call the Springfield air conditioning repair professionals at Comfort Flow Heating. The AC Disconnect Box ... the rest of the system won’t work, either. Old thermostat or damaged thermostat wire will cause the condenser to run and not shut off. (Note: Some thermostats may also control a heater and, as a result, will have three terminals. The condenser coils dissipate the heat as the refrigerant passes through the coils. 5.0 Rating. This will be a set of contacts that are normally open. © 2012–2020 Comfort Flow Heating. If the fan continues to run, there could be a problem in the thermostat or the wiring. Air conditioner is too small – If your air conditioning system is too small for your home it may run constantly in order to cool your home. Main control – Your air conditioning system has a control board in it that provides the power to the compressor and the fan motors. These are located outside in the condensing unit and they are responsible for exhausting the heat from your home. The term short cycling refers to when an AC system’s cooling cycle terminates prematurely only to turn on again after a short time. The filter has been changed every month and this problem just started 2 days ago. If it doesn't have one, you can turn off the AC at the thermostat and turn it back on in 5 to 10 minutes. These are located outside in the condensing unit and they are responsible for exhausting the heat from your home. If the coils are significantly dirty, the air conditioner will not be able to maintain the proper temperature, and the compressor will run continuously in an attempt to cool the room. 4 Signs That You Need To Replace Your Air Conditioning System, How Indoor Air Quality Can Affect Your Air Conditioning, Springfield air conditioning repair technicians, “My Heater Is Drying Out My Air, What’s Wrong With It?”, Heed These Signs of a Furnace in Disrepair. Below are the most common reasons your AC won’t turn on. All rights reserved. Here is a quick explanation of what might be causing your AC system to run all the time. I immediately shut off the AC main power. As debris builds up on the coils, the air conditioner will become less efficient, causing the air conditioner to work harder to cool down. Compressor failure commonly manifests in the following ways: An AC compressor that won’t turn on. It is as if I had gone to the circuit breaker and cut the power to the whole HVAC system, but I didn't. There's a good chance that the problem is a tripped breaker if the circuit was overloaded. Check the condenser coils to determine if they are dirty. An AC system may turn on and off repeatedly due to dirty, broken, or failing parts or for various other mechanical or electrical reasons. When it’s hot outside and you try to turn on your AC to get your house cooled down, only to find that the air conditioner won’t come on, you’ll know something is wrong right away. If you’ve started to notice that your air conditioning system is constantly running it usually is a sign that you’re system is having problems. Thermistor – The thermistor is what detects the indoor temperature of your home. If the unit doesn’t turn off then you may need to cut power to the whole system. When this happens, try the following: • Make sure the AC hasn’t been turned off. Email. If your AC unit won't turn on, the first thing you should check is if there was a blown fuse or a tripped breaker. Your drain pan should also have a secondary drain (to keep this from happening). This is especially common during the summer months when temperatures rise and your air conditioner unit is working hard to keep you cool. Check your thermostat to see if the actual temperature in the space is below the set point. 01 - Condenser Coils are Dirty. 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. Try the Reset Button If your unit has a reset button, push it and see if it helps. The condenser coils dissipate the heat as the refrigerant passes through the coils. If the thermostat does not have continuity while the air conditioner is set to cooling, replac... e the thermostat. If there is a problem with the relay board, it might provide continuous voltage to the compressor. Refer to your air conditioner’s wiring diagram for more information. 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 turn the blower fan off, simply set your thermostat to the ‘auto’ option. Read More. Locate the fan relay. Before you replace the main control board, make sure you check more commonly defective parts. Coronavirus Update: We care about your health and continue to service our customers safely. Apr 15, 2015 – Perhaps the fan inside the furnace unit runs, but doesn’t blow cool air?. We understand that issues like this can be frustrating and expensive, which is why we do everything to resolve your issue to your satisfaction. Give it a good ten seconds and then kick it back on. It can shut off power to the indoor AC blower. If there is a problem with the control board, it might not stop providing power to the compressor. A Circuit Breaker Tripped. The second common call is exactly the opposite problem — what if the HVAC fan won’t turn off? If they get too dirty, it will restrict your AC’s ability to remove heat from your home. Thermostat – Your thermostats are one of the most important and powerful components of your AC system. These would be the thermostat wires that go to the air conditioner condensing unit. Wait to see if the air conditioning unit fan eventually shuts off. If your system is running all the time then the control board could be defective. ... At Jerry Kelly Heating & Air Conditioning, we’re all about solutions. Dirty condenser coils – Another cause of this could be the condenser coils. If your air conditioner is continually blowing cold air and doesn’t shut off even though the set temperature has been reached, you may have a problem with the control board. If the outside unit stops working, but the inside unit is still running, with the blower fan operating, you’re still out of luck. The system won’t be cooling your home since both sides of the system need to be operating. This air conditioner problem can occur. If the thermostat has continuity all the time, this indicates that it is shorted out and should be replaced. If you are certain that all of the other components are working properly, replace the main control board. The outside coils are clean as well as the inside coils. If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. If the thermostat has shorted out, it might send continuous voltage to the compressor and cause the compressor to run all the time. Indoor fan won't shut off unless I use the circuit breaker: So your indoor fan never stops running. If they are faulty, they may not shut off your AC when your inside temperature has reached the appropriate level. Coronavirus Update: We care about your health and continue to service our customers safely. The only way to get that pesky fan to stop running is to shut it off at the breaker or the Emergency Shut-off switch. Outdoor unit won't shut off unless I use the circuit breaker: This happens occasionally. Hold times are long. I have all the switches on the thermostat on "off", but it just keeps going. Shipping all 7 days! This air conditioner problem can occur on central air conditioning systems or on heat pumps when in cooling mode. If an inside air conditioning fan unit will not shut off, there are a few remedies. Before you replace the relay board, make sure you check more commonly defective parts. Before you replace the temperature control board, make sure you check more commonly defective parts. |, Join our email list for event updates and specials. If it is faulty, it may not tell your air conditioning system to turn off when it should. Because it is too small, it won’t be able to circulate enough air so it will run all the time. 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Improvement a call on ( 844 ) 468-7244 to stop running is to shut down continue to service our safely! Unit has a control board in it that provides the power to the fan outside... 2015 – Perhaps the fan continues to run continuously not just cooling air! Will cause the compressor to run constantly fan switch on the thermostat wires that go to compressor., ice may build up on both the inside coils sides of the system won t! See if it helps up and cool the air conditioner problem can occur on central air system... Continue to run continuously the electrical sound from the unit and they are dirty, they won t.