There are a number of reasons a window air conditioning unit is not blowing cold air. From a dirty filter to simply being worn out. So lets take a look at some of the top things to look for when a unit stops blowing cold air into a room. All air conditioner units needs good air flow to work properly. A dirty air filter can block air flow and cause a unit to stop working. The air filter is usually placed inside the front cover and each unit has its own way to replace or clean it. Clean the Outside Fins of any Debris The outside fins are there to dissipate heat as a fan blows air though them much like a radiator in a car. If the fins become clogged they can stop dissipating heat and the unit will stop working. A quick way to fix this is with the unit off use a hose to blow out anything that may be blocking the fins. Be careful not to bend the fins as they are easily bendable and will restrict the air flow if bent. Clean the Inside Coil The inside coil can become dirty the same as the outside coil and need to be cleaned.

The inside face plate cover will likely have to be removed and will depend on the unit how this is done. Don’t use any chemicals to clean the inside coil as they will smell as they are blown into a room. Use plain water and clean the dust or any build up that has occurred. Again be careful not to bend the small fins. Check if the Outside Condenser Fan is Blowing Air. It is easy to tell if the inside fan is blowing but there is also a outside fan that blows hot air away from a unit. If the outside fan stops blowing the unit will not work. Some outside fans work only intermediately and shut off to save energy when not needed. Most Window A/C Units use the same motor to turn the inside and outside blades but they can be separate. There is no need to open the unit up to see if it is turning as you should be able to feel the air moving past the outside of the unit. Be sure to check the outside fan when the unit is not working which is when it should be on and blowing hot air away.

Does the Compressor Turn On? The compressor makes a clunk and noisy buzzing noise when it clicks on. It is basically a pump that cycles the refrigerant throughout a unit.lg air conditioner repair service in hyderabad It is usually noticeable if a compressor has gone bad since the noise the unit makes will have changed.friedrich portable ac unit Be Sure the Thermostat is Set Low Enoughinside ac unit buzzing This may seem obvious but happens. Check the thermostat on your unit and be sure the temperature is set low enough for it to kick on. Once general maintenance and main components are checked if a unit is still not working than it is likey time to replace it. A professional can be called to fix it but is likely not worth the effort since the cost is usually more than replacing the entire unit with a new more efficient model.

There are many affordable options if a new unit is needed click here to see our pick.Detecting heat pump noise can turn an expensive future expense into a less expensive fix right now. This page is not meant to address every possible noise coming from a heat pump. Each model and each manufacturer is a little different...so the troublesome noises will be different.But....there are many common noises that originate from the components of a heat pump. Please keep in mind that diagnosing a noise using words is very subjective and is open to much interpretation. So this is merely a guide to help narrow down the possibilities. Share your experience here First, let's talk about the heat pump noise encountered during the defrost cycle. This is commonly mistaken to be a problem, when in reality, it is very normal.Watch and listen to the video below. The noise encountered when the fan stops is the normal sound emitted during the defrost cycle: Now let's discuss some common noises that could be the first sign of a problem.

Humming is a very common noise that originates from the outdoor unit, especially when it is not able to run.Humming often indicates a I know that description sounds strange but this is often the description given when a compressor is receiving liquid refrigerant. The louder it is, the more liquid it is receiving. This problem is one that should not be ignored. There are many potential causes for liquid refrigerant slugging and a service technician will need to go through the diagnosis process. Screw compressors are often high pitched, especially at start-up. So if the system has "always" had the high pitched squeal, chances are this is typical. However if you had never noticed it before, this could be an early indication of a motor going bad. Potential causes for a loud and frequent metallic banging is: The difference between Noise #4 and #5 could be insignificant. Depending on what you interpret as a "metallic" sound could be the difference in diagnosis. So it is very possible that the causes above could apply to this section as well (and vice versa).

A hissing heat pump noise is almost always a refrigerant leak. A refrigerant leak that can be heard is quite large and it will result in a "flat" unit in a short amount of time. So this must be remedied quickly. Just like noises #4 and #5, is the pitch of the rattling low or does it have a high pitched metallic sound?Does it sound like it is coming from the compressor or another part of the unit? The diagnosis for heat pump noise that has an uncomfortably loud, high pitch sound almost always goes back to the compressor.If it is high pitched this could be a dangerous situation for both the equipment and any people involved. This could indicate that the compressor is pressurizing the refrigerant to an abnormally large differential pressure. Very carefully record the actual pressures and shut it down as soon as possible. If there is concern regarding the operational safety of the equipment shut it down immediately. Sometimes there is nothing abnormal about a loud low-pitched noise.