Identifying Air Conditioner Noises and Smells Sometimes unpleasant smells and noises coming from an HVAC unit can indicate a problem with the system that could require maintenance orIf you’re experiencing air conditioner noise or if your air conditioner smells a bit funny, there may an issue inside your system. Components that could experience these problems include: • Compressor – While compressors are noisy by nature, if your compressor is making loud or unusual noises, it may be worn out. • Drive Shaft or Fan Blower Motor – If the drive motor is making loud noises, it may need some lubrication. All motors need to be lubricated at all time, otherwise it will wear out. Loud noises may be either• Fan Blade – If one of the fan blades break off, it can start rubbing against the house and cause unwanted noise. If the air from your system smells musty, it may be due to mold and/or mildew buildup in your duct system.

One way to get rid of this is to change the filter and clean the drip pan in your HVAC system. Clean using bleach or white vinegar to make sure the area is no longer hospitable to mold growth. Common furnace noises and their causes There are several furnace noises listed below, some of which couldwall ac units vs central air indicate a problem with the unit. air conditioning split systems pricesIf you’re concerned about a furnacewhy does a window ac unit leak water noise contact your local American Standard dealer to schedule an HVAC check-up: • Screech – This could be a problem with your motor or fan• Chirp – Chirping sounds are fairly common with furnaces and usually the natural noise of the mechanisms.

Rattling noises typically happen when the system is cooling down and it not usually cause for alarm. • Boom – When the weather outside warms up or cools down, the ductwork in your house expands andIf this happens and your furnace smells like it’s burning, you might have a dirty burner in your furnace or a defective gas• Ping – This sound can also be caused by contracting • Hum – When the furnace burner lights, it may cause a humming• Whine – Whining or odd vibrating noise may indicate a problem with your furnace. • Crackle – Crackling noises may be the metal parts cooling down after the furnace shuts off. Clunk – Clunking or bumping sounds often means you have a cracked belt. The best way to determine whether your furnace is making an odd sound is to learn what it sounds like during normal operation, and note any changes in the type or volume of sound as the unit ages. you notice a significant change, call your local American Standard

dealer to schedule an inspection. Professional help for unwanted HVAC noises and smells If you’re experiencing unwanted noises or smells from either your hvac system, call a professional. While some noises are normal, others could indicate that something is wrong with your system. Standard Customer Care dealer can come to your home to see what may be wrong with your HVAC system and repair it, allowing your family to enjoy some comfort, peace and quiet.Air-conditioning noises can indicate proper operation as well as an indication there's a problem developing or present. asked to listen to a certain noise the air conditioning system is making and provide feedback about what it means. In this article we'll discuss both sides of the subject. This will include normal noises you should hear from the system when it's working properly, but first we'll tackle the bad sounds that should be investigated further. Most people are interested in the noises their air conditioning system

shouldn't be making, so we will address those first. are perhaps the most common complaint from drivers. In this situation the serpentine belt is often the culprit. These belt noises can sound like a major problem and are sometimes mistaken for bearing failure. It's tempting, but not recommended to use belt dressing for diagnosis, because it contains oils that can damage the rubber. Instead use a high output spray bottle of water and carefully spray the belt to see if the noise disappears. If it stops squealing when wet this is an indication it needs further inspection. A worn or stretched out serpentine belt along with a malfunctioning tensioner are some of the problems that can develop with an air-conditioning drive belt. However, poor quality parts can make a racket all on their own. I prefer to use Continental Elite or Goodyear Gatorback engine belts with quite technology when replacing parts. Bad compressor pulley bearings can also make noise.

In this situation it increases when the compressor clutch is engaged. Determining the difference between belt and compressor problems can be tricky. If the belt is old you might consider replacing it for maintenance reasons and see if it solves the noise problem. If you need more information on this subject I have posted some diagnostic information and several popular drive belt diagrams on my other site. When in doubt seek professional diagnosis. When we talk about AC compressor noises we're discussing sounds it can make when the unit is engaged. If the Freon has leaked out, it won't turn on, so nothing is moving inside. In this scenario people might try adding refrigerant on their own. Then when the unit kicks on they could hear a noise. A buzzing noise from the compressor when the air-conditioning clutch is engaged is a sign of an overcharged system. In this situation the buzzing sound is caused by liquid refrigerant entering the compressor intake port.

Of course, this problem is most common after an air conditioning service when too much Freon has been added. When this is the case it needs to be corrected as soon as possible, because it can cause internal damage. Replacing a car air-conditioning compressor is expensive and harder than it looks. Also note the AC will not cool properly when it's overcharged. Next up is knocking or clicking sounds while the air conditioner is running. caused by loose mounting bolts that secure individual air-conditioningThis isn't as common as the above conditions, but I have found this issue more then once. You can literally stand back and see the loose component shake and move when the engine is running. Nevertheless, this may actually be the best case scenario for car owners when it comes toTightening a few bolts and adding some thread locking compound will solve the problem for good. Many times a friend or customer will ask me to come listen to a strange hissing sound when the automobile is turned off.

Naturally, this is after running the system for a while on a hot summer day. Although this hissing noise, sounds like a bad noise, it's actually a good air conditioning noise. The hissing sound is caused by equalizing pressure. AC system is running there is a high side and a low side that's divided by either an expansion valve or an orifice tube. sides of the system are necessary for proper operation. When the vehicle is turned off or the air-conditioning compressor clutch is disengaged the system will equalize the pressure. sound is the Freon from the high pressure side slowly feeding into the low pressure side and this is completely normal. Another good air conditioning noise is the roar of theWhen the AC is running the condenser fan will pull additional air through the radiator and the condenser, removing heat from the freon gas and returning it to a liquid state. can cause additional noise that's not present when the systemOften this additional noise is sensed as a problem by