Question about Sharp CV-P09FX Air Conditioner

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Bad smell from ac unit in my house

I was just wondering if I burned up my fan motor..... I decided to just run the fan on my ac unit last night.....and several hours later I woke up to a bad smell ....the kind of smell you get the first time you run your heat in the house....I just shut everything off and went back to bed .....well tonite I turned my ac on and about 30 min. later that dirty smell started again...... could I have burned out the fan motor and if so are they expensive???? thank you

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  • Anonymous Dec 03, 2008

    HI, THAT IS MY PROPLEM

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Does it smell like literally , dirty socks?if so it is dirty sock syndrome, a plague of heat pumps for years. if it smells like an electrical melting or burning of wires then time to call a pro.it could be a weak capacitor or a weak fan motor. if it is dirty sock syndrome then its the microbes that thrive when temps are middle temps and reproduce when temps are hot and cold in intermittent days. hot one day and cold the next equals call for cool then call for heat and hot steam from heated coils cause s bacteria to grow and microbes to spread across coil. when you switch back it causes the smell.if the coil is clean you can spend a chunk of money on sanitizers but best bet is to run it cool for hot weather and hot for cool weather. the transitional periods are what create the smell. avoid semi cool and semi hot periods. this condition is common to acs from all brands . lots of stuff on the internet about dirty sock syndrome

Posted on Nov 01, 2008

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You have DSS. When was the unit installed? Have you contacted the installing contractor? Have you told him what it is? Did you get a parts and labor warranty with the unit? Best solution is a new coil, get it coated and ask the contactor and manufacturer to foot the bill.


Mike

Bronz-Glow
Bronz-Glow.com

Posted on Jan 03, 2009

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Burning smell from AC Unit


http://www.hannabery.com/faq14.shtml

"Odor problems can be as serious as a gas leak or as simple as a dirty air filter. But remember, a good mechanic doesn't just use his hands. He uses his ears and nose. Unusual odors could indicate a serious problem and should not be ignored. 

We will go through each of the five categories and list the possible causes and things to check.


1. Electrical odor - Electrical odors are usually caused by parts overheating. Indoor blower motors are a common example. If there is a mechanical failure such as the bearings seizing up, the motor over-heats and the insulation on the wires and the motor windings themselves start to melt, causing the odor. 
Sometimes loose electrical connections cause wires or plastic relays to overheat causing electrical odors. 

It is possible for a very dirty air filter to cause the odor. If the airflow is restricted enough, it could cause electric resistance heaters to overheat, even burn-out. 

If you smell an electrical odor, check your air filter. If it is not blocked, shut off equipment at the breaker if possible and call for service. 


2. Burning odor - This is similar to an electrical odor only worse. It is also sometimes accompanied by smoke. Once again, this can be caused by parts or wiring burning-up. 

It can also be debri such as plastic getting into the ductwork and melting on the electric resistance heaters or heat exchanger. 

If you smell a burning odor, check your air filter. If it is not blocked, shut off equipment at the breaker if possible and call for service.



3. Gas odor - First of all, if you really smell gas and suspect a gas leak, you should open the windows, get out of the house, then call the gas company. 

Now excluding that "worse-case" scenario, if you notice an odor that smells like gas and it seems to be coming out of the supply vents, it usually isn't gas. Sometimes dust that settles on the heat exchanger during the summer months burns off at the beginning of each heating season and it smell just like gas. 

If the odor doesn't seem to be coming from the vents, try to pinpoint where the smell is coming from. Use your nose. If it is gas, it usually would be from a leak in a pipe fitting or at the equipment itself. 

Gas odor is the one that causes the most fear. People think of gas explosions or carbon-monoxide poisoning. Well, gas explosions are very rare and carbon-monoxide for the most part is odorless. 

Having said that though, don't take a gas odor lightly. If you can't locate the source of the odor and you are worried you have a gas leak, remember, open the windows, get out of the house, then call the gas company. 


4. Oil odor - Oil odors are usually caused by one of two things. An oil leak/drip or an oil burner that is not working properly. 

The oil leak is usually easy to spot. Just look for oil. Check the burner itself, the oil tank, filter and oil line. Sometimes it is just a matter of tightening a fitting. If there are no signs of an oil leak then it is most likely a burner problem. 

This can be caused by many things, too many to list. It could be a minor adjustment to the burner to a faulty or blocked chimney. From a bad fuel pump to a plugged oil nozzle. Listen for any unusual rumbling or banging sounds or smoke or soot while the burner is running. If you notice any of these things and/or you have an oil odor, you should call for service immediately. 

One other common problem today is that new houses are insulated so well and are built so tight that they run out of combustion air, causing odor problems. In this case it is just a matter of bringing in a fresh air for the burner. Call your local Heating Company to assist in a proper diagnosis. 


5. Damp and musty odor - This is more common in the air conditioning mode. Sometimes attic units or very damp basements have this problem. Check for air leaks in the return ducts. Check for water damage to the ducts or air handler itself. Possibly consider having your ducts cleaned. Run a dehumidifier and see if the odor goes away. 

But this odor problem is almost never due to a problem with your equipment. 

 


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Keep in mind that almost all heating systems cause an odor the first time they are fired-up. And the first few times at the beginning of each heating season. Brand new furnaces are coated with oil to keep the heat exchangers from rusting. This burns off, creating a bad odor - even smoke. But it usually only lasts for about 20 minutes. Opening the windows usually solves the problem. And the first few times the backup heat on a heat pump kicks on, it smells like an electrical smell. This might last for a few days but isn't that bad. If you are worried, call for service. 

Remember to check for a clean air filter and that your vents are opened. Check to see if the fan is working which mean your motor hasn't burned-up. 

Check for air leaks in damp areas, oil stains or rumbling sounds, strong gas odors - these all indicate problems. Do not ignore them. 

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