Gas Smell Coming From Oven

After we purchased our new condo we quickly decided the old oven needed to go and it needed to be replaced by a new oven.  When we pulled the old oven out, the only replacement option was to go with an all gas range – there was no electrical output to power a stove.

When our new range arrived we hooked it up, turned on the stove and wa-la things worked great.  Well it worked great until we turned on the oven portion.  After just a few seconds we detected an off smell and turned off the oven.  Later on we cooked a batch of brownies and the strange smell filled the house, so we finished the brownies with some windows open regardless of the cold winter air.  Then like any smart man would do, I went to Google and searched for something along the lines of “When I turn on my gas oven I get a strange smell.”  What I read there cautioned me that I should have no smell, that all of the gas should be burning up, and if I did have any smell there was a problem with my oven. It may be unlevel, the glo plug may not be burning all the gas… everything was saying the oven was faulty.  So we called and the Maytag Man came – here’s what I learned.

After five seconds of the oven being on, he asked “is that what you are smelling?”  He seemed slightly irritated when asking the question, and I replied “yes!”  Turns out the smell was Carbon Monoxide and he gets lots of calls at this time of year for that smell. What I once thought was odorless (Wikipedia says it is odorless! Middle school home economics taught me it was odorless…) actually does have an odor.  He then turned on a burner without a flame so it would release only unburned gas for me to smell.  The small of unburned gas was very different and distinct – he described it as almost a rotten egg smell, and that is a good description of unburned natural gas.

What I learned & what you should know about gas ranges:

Just like a furnace for your home, the oven produces CO.  The difference between the furnace and your oven – your furnace is required by code to have a vent to the exterior, whereas ovens are not.  If your oven is not vented to the exterior, your house will fill with the CO which your oven is creating through the process of combustion (combustion is when oxygen and your natural gas mix together under heat and it makes the flame which heats up your oven). Your oven probably should have a vent which flushes CO to the exterior of your home, but again this is not code and not all homes are equipped with a vent to flush the CO. While this is unfortunate, it is normal. This is something to worry about, but nothing to condemn your oven over. Just be safe, and here is how you do that: crack a window or a door – even a small opening will allow for enough circulation. So before you go running to the repairman and wasting his time (or in some cases the fire departments time), read this blog post. Suggest it to a friend. I hope if you Google “Funny smell of gas coming from my oven” this is the first post you land on!
A few recap points about these problems occurring:

  • Contrary to what you may have heard, CO is not completely odorless (at least when burned from a gas oven) – it has a distinct smell in your air.
  • Newer oven models are much larger.  Larger means they burn more gas.   More gas burning means more CO smell.
  • This problem should only occur if you have no vent to the outside. At the same time even your gas burners, which are not vented, may cause a slight smell.
  • The smell is typically more pungent in the winter, because people seal their houses more tightly (less air circulation).
  • If you burn nearly all of the oxygen in your home, the only remaining fuel for the gas to combust with is CO.  Once that starts burning you get CO2, and that is toxic.
  • If you cook for long periods of time (Thanksgiving), you MUST have some air ventilation going…. even if it’s really cold outside. If you don’t, you could be hospitalized or die.

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