Question about Air Conditioners

1 Answer

Smell of burning rubber

At times when the heating unit comes on there is a very strong smell of burning rubber. The unit has a direct drive pump. A techcian has been out and could not find anything wrong.

Posted by on

  • jpbrarsr Jan 13, 2009

    The unit is the heater for our home. When I turn the heater on there is a smell of burning rubber or wiring through out the house. This doesn't happen every time, but is sporattic. We don't see smoke but it sets off the smoke alarms. I have had a licensed electrician out to the house to look at it, but he was not able to find anything wrong. We ran the heater for about 30 min. while he was here, but it did not malfunction, (go figure). The model # of the unit is RBHC-21J18SFA. Serial # is T M3901 14631 Thank you again for your assistance. John Brashears

  • Brian Markstahler May 11, 2010

    what are we working on? as it has a direct drive pump i would assue it is either hot water or geo-thermal heat? more detaail as to your system is needed to attempt diagnosis.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 24 Answers

Alright so you have a heat pump with back up electric resistance heat. We need to determine if your odor occurs when the heat pump is operating, when the electric resistance heat is operating or both to isolate the possibilities since the issue is intermittent. Thermostat should have an emergency heat position, this will shut off the heat pump and operate the electric resistance heat only. If the smell/odor occurs then we have reduced the possible causes. let me know, happy hunting.

Posted on Jan 15, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Strong burning smell coming from vents and from inside rheem electric central heat. Smells like rubber burning.


You must have to open it, try to clean it..and check for some eletric cables with short circuit or bad cables burning and overheating...check the motor fan and if it has a bad AC capacitor
check the photo, and you will have an idea.v4ndre_0.jpg Good luck!

Dec 06, 2010 | Air Conditioners

1 Answer

My torpedo heater seems to burn fine and hot , but, is blowing a strong kerosine smell. I fired it up for the first time after it sat all summer. It sputtered and smoked the first two start ups. but it's...


I'm not familiar with this device but if it's anything like an oil central heating boiler the most important think is to ensure that jets are clean in order to get a fine mist of oil. If the jet is dirty you will end up getting a coarse spray or narrow jet of oil which won't mix properly with the air and therefore wont burn properly. Jets can be cleaned with compressed air or soaked in petrol (gasoline) to dissolve any gum build up if they are made of brass or other metal. Ensure that the petrol doesn't come into contact with any plastic parts or O rings as it may dissolve them. Don't attempt to clean jets with wire as it can cause damage. Possibly there is an oil leak somewhere in the unit when it runs which is causing the smell?

Nov 26, 2010 | Air Conditioners

1 Answer

Heat pump was on and the smell burnt resistors coming from ducts


A burning smell could indicate an electrical problem (something overheating) or, if the unit has electric strip heaters that have not been energized for a long time, the buring smell could be the dust burning off of the heaters.

Feb 24, 2010 | Coleman Mach III Air Conditioner

1 Answer

When we turn on the central air there is a strong burning smell...like burnt toast but way stronger. IS it safe to remian in the house?


Is your central air furnace or electric heat. Electric furnace sometimes have electric strip sequencer stick in the closed positions leaving on one strip of the electric heat. Get a service tech as soon as possible to check this out. Any smells from a central unit need to be teken care of promptly. TURN OFF unit you have it checked for your safety. Rus

Jun 28, 2009 | Coleman Air Conditioners

1 Answer

Gas emergency heat pump comes on with chemical odor


If the emergency heat doesn't come on very often, it will burn off debris that has collected on the heat exchanger causing the smell. Also, check that there aren't any chemicals that are being stored around the unit that would put out fumes that can be drawn into the system and when heated, cause the odor.

Mar 31, 2009 | Carrier 52CQ-312-4 Comfort Series Heat...

1 Answer

Smell when unit comes on with heat


Hi!!!remember everytime you turn on yout furnace you will have a strange odor thats all the dirt that is burning from the heating element if your using the emergency heta if not the what you are smelling is your fan motor replace it and you should be fine..Good luck..

Jan 19, 2009 | Ruud Matching Split Air Conditioner

2 Answers

HEAT PUMP/AIR CONDITIONER UNIT SMELLS ONLY WHEN AIR IS ON


Not sure what the smell...smells like.  My guess is dirt or dust near the heating elements.  These will cause a burning smell.  Sometimes insects even get into the act..building webs.
You will have to clean that area out...sometimes a large blower or vac can dislodge the dust.

Dec 04, 2008 | LG LS-K1830CL Cool Mini Split Air...

2 Answers

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. 

 


Final Tips:

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. 

Hope this helps, remember - these are just rough guidelines and not all possible situations are covered."

Jul 28, 2008 | Sharp CV-P09FX Air Conditioner

1 Answer

Goodman Heat/Air unit Model # A49-20 Serial # 9909502720


It sounds like the blower motor has burnt up.(the one inside) The unit running for a few minutes then shutting off, is due to the high pressure/temperature safeties. When you removed the panels, did you notice any fan running?

Feb 17, 2008 | Goodman CKL49AR49 Air Conditioner

2 Answers

Heater problem model PHK 080-1


THE BURNING SMELL IS NORMAL. BEFORE HEATING SEASON OPEN ALL DOORS AND TURN THE HEAT UP AND LET RUN TILL ALL DUST IS BURNT OFF. IF BLOWER IS NOT COMMING ON NOW. THERE ARE 2 TIME DELAY RELAYS, AND ANOTHER RELAY FOR "FAN ONLY OPERATION". ALWAYS MAKE SURE THEY ARE NOT THE PROBLEM BEFORE REPLACING AN EXPENSIVE MOTOR.

Feb 07, 2007 | Goodman PHKJ060-1 Air Conditioner

Not finding what you are looking for?
Air Conditioners Logo

Related Topics:

2,158 people viewed this question

Ask a Question

Usually answered in minutes!

Top Air Conditioners Experts

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Bill Long

Level 3 Expert

577 Answers

Tim Whalen

Level 3 Expert

3056 Answers

Are you an Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...