Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Electrical smell About 2 weeks ago I started smelling an odor. It smells like it is electrical. It is manly in the rooms in the back of the house. Two or three yrs ago I did have wires that burned in a outlet. The smell is not constant but it is enough to burn my eyes and get caught in my throat. I have had the gas company here,he founf nothing. I then called a furnace man he again foung nothing. I do not want to live like this. I dont no who to call.

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Did you recently screw or nail something to the wall?do you have the old fabric coated wires?

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Gas appliances emitting odor

Sounds extreme but give your local Fire Station a call. They will be happy to break the monotony of the day at the fire house and come to your house with a sniffer machine. It will tell what the odor is? Then get a furnace engineer to check over and service your appliances.

It sounds to me like you might have a blocked flue, and that will cause carbon monoxide poisoning.

Let me know how you get on.

Feb 03, 2016 | Heaters

2 Answers

We have a rinnai convector gas heater and when we turn it on it fills the room with a horrible gassy smell.

There are a couple of things that can cause this odor. But, being sure it's really a gassy odor is more important. It must smell like "rotten eggs" to be gas. If that is the odor you're smell, turn the heater of and contact an authorized Rinnai dealer for service.

If however the odor does not meet the "rotten egg smell", there are other things that cause the odor, but it's not really from the heater.

If you have painted or stained within the last 2 weeks, the heater has picked up the odor of the fumes (which you probably didn't notice) and has made time 50 times worse. The same holds true for carpet cleaning or new carpeting odors. If this fits the scenario, discontinue using the heater for a week or two until the odors subside. In the meantime, if weather allows, air the house out. Also, remove and clean the heaters filter, before restarting the heater,

I hope this helped you to troubleshoot & solve the problem.

Jul 11, 2011 | Rinnai Heaters

1 Answer

Our rinnai avenger 25 gas heater has a gas smell that is overwhelming in our house. Is this a common problem? How and where do we fix it ?

No. it's not common. Or at least not, if it's regularly cleaned and serviced. However, I would caution you that many strong household odors are picked up by the heater and made to smell 50 times worse. If it doesn't smell like rotten eggs, it's not gas you're smelling. It's something else .... have you painted recently or stained the wood work? Have you had the carpeting cleaned or are you burning scented candles while the heater is in operation? All of those things and instances can cause the heater to smell. That's because the heater uses interior air for combustion, so whatever is floating in your household air (dust, lint, pet hair and odors) eventually goes into the heater. If you answered yes to any of the above, stop using the heater (turn the pilot light OFF) for a week or two, until the odor that i's picking up has completely disipated. Paint on the surface may feel dry, but underneath it isn't.

Now, please don't get me wrong. I have been in the hearth and home business for 15 years, now and Vent-free or Flue-less or Ductless heaters are our primary business in the Fall & Winter. They are 99.9% efficient and are totally safe, when properly used and maintained. Over 1 million Vent-free Gas Appliances have been sold and installed worldwide in the past 10 years. There has NEVER been a death related to any of these products. In fact, they have more safety features built-in to them, to shut them down if something goes wrong, than a gas water heater or a Vented heater does.

Now, lets get back to your issue. If in fact, if it is gas you smell and the odor is not caused by the things I listed above, there are a couple of things to look at. Do you only smell the odor when the heater is in operation? Do you smell it with just the pilot light burning? Or with both? How airtight is your home? If it's a recent vintage home and it's really airtight, you may be getting what's called "After Product Burn Smell". This occurs frequently in airtight, new home construction, because there's no air exchange in the house. Unless, you open a door or a window once in a while, to allow fresh air in. Also, the Btu output of your heater (38,400) may be to high for the area you have it in. Unfortunately, it's not a case of one size (Btu Output) heater, fits all.

Other causes for the gas odor can be related to the burner(s) being dirty (incomplete combustion) and needing cleaning. Old gas in the tank or a low level of gas in the tank. The inline gas shutoff valve, not being fully open.

If after reading and troubleshooting all the things I listed and the problem is not solved, you need to contact the dealer you purchased this heater from and have them make a service call to your home.
To help you further, in case you have misplaced your Owner's Manual, I have included a link to it, that you can download and print for future reference.

I hope this helps you to troubleshoot and solve the problem. Please let me know. Thanks.

May 22, 2011 | Rinnai RHFE-1004FA 38,400 BTU Energy Saver...

1 Answer

I have a 30,000 btu ventless mr heater for two months it has run with absolutely no smell,the other day I did some wood staining, now the heater has a strong co2 smell is their any way to clean the heater...

Sure is. Never operate a vent-free gas appliance (not even the pilot light) while painting, staining, cleaning carpets, etc. It picks up the odors and will not burn the odor off, because the odor doesn't get in the heater, it just makes the odor worse. You will need to turn the heater off and not use it, until ALL of the odor from the staining have completely dissipated . It may take a week or more, even though you may not be able to smell the odor from the stain, the warm moist air from the heater will activate it again. If you get a warm day soon, open a window or two and let the fresh air in. That will help dissipate the odor. But, allow a week minimum, before trying to use the heater again.

Oh, by he way, that wasn't co2 you were smelling. co2 is dry ice. It has no odor. Just like co (Carbon Monoxide) it has no odor. You were smelling the fumes from the stain. Just 50 times worse.

Good luck to ya,


Mar 02, 2011 | AOC Heaters

1 Answer

Holmes Heater HCH 4163 purchased 2 years ago & has seen only light duty. Upon turning heater on there is a severe electrical smell allthough heater appears to function normally; cord & heater do...

I think the warrenty on this heater is one year. If the heater housing and cord are not overheating then I would remove back panel and clean fiter and brush,vacumn,or use compressed air to clean motor and fan blades. It's possible that if you have not been using very much that it's just burning off debris and causing the smell. I hope this helps you. Thanks

Dec 20, 2010 | Holmes Products HCH4163 Ceramic Compact...

1 Answer

My electric furnace has a strange odor.

your coil may have dirty sock, the coil at air handler (evaporator) needs to be cleaned with coil cleaner that will mask or remove the dirty sock smell

Oct 27, 2009 | Heaters

2 Answers

Glo Warm Self Venting Heater Model FB3B Emits strong odor

The propane may have a higher sulfur content; however, the odor may go away soon. It is probably caused by the dust and oxidation (micro-rust) that attached itself to every part of the heater while in storage, even though it was "sealed".

Sep 29, 2009 | Dyna-Glo D-E36 Infra-Red Wall Mounted...

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Electrical burning smell in house

Mhenn, It is my guess that the 'electrical burning' smell is from your heating system. Since there is no smoke and the walls are not warm.... then there is no real problem. The smell maybe just dust has collected in the duct work that is burning off the central heating systems electrical heat strips. If you have electrical heat strips then that may be the problem. If you have a central gas heat system, it may be the same type problem. Hope this helps you. Henry

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11 Answers

Ventless gas heater smells like kerosene

It is posible that your heater is burning fumes from paint, varnish or stain and some times carpet cleaners or other household cleaners. I work for a utility company. We get called to homes for a lighter fluid/kerosene smell quit often. Most of the time it is from the fumes burning off on a standing pilot gas oven. The odor collects in the oven and is released in the customers face when they open the oven door. This will happen with any open flame appliance when exposed to these fumes.

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2 Answers

Cozy 351A 35000 btu

You might have a slight odor of gas when the burner first ignites. Some gas does escape before it completely ignites. It shouldn't smell after 2 years of use. If you can see the pilot flame burning from the top of the heater, the heater pilot assembly is pushed over too far. The pilot fumes could be escaping in the room and cause a smell.

Dec 27, 2008 | Cozy Enclosed Front Console Heater 70,000...

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