We have a propane cook stove. Have been using it for several years. Lately we are getting a very strong unpleasant odor when using the oven. Difficult to compare the smell to anything, but not pleasant. It is not the usual propane smell,much sharper and more 'chemically'. Seems to happen just when the oven comes back on, but not every time. I haven't done any painting or anything for several years. I have moved the stove out and checked in the cupboards around it, and nothing there has changed. It only happens a coupe of times each time the oven is used, Never have this smell when using the stove-top burners. When the oven is turned on initially, it takes up to 5 minutes for it to light, so the igniter is probably weak, but can't see how that would cause the problem, as it doesn't create that smell on initial start-up.
Pull the oven burner and check for lint or any thing that could partially block the air inlet at the burner venturi. If you can see the flame, It should be blue and have a definite pattern not yellow and lazy. My last home had propane for cooking and the stove required more than normal maintenance. If the odor is a "burn your nose or eyes" kind of odor that usually means not enough combustion air at the flame, and a weird smell is what you get. – d.george 6 hours ago
The most common cause of a kerosene odor in the house is the presence of petroleum products like paint or oil. When drying paint mixes with traces of natural gas in the air (from your stove, water boiler, etc.), it produces an odor similar to kerosene. It's not dangerous - just thoroughly air out your house. This was useful information to me. I had just painted a sign with oil based paint and it was drying on the kitchen table. I removed the sign and the smell went away.