Why is my new stove still giving me one yellow and one blue flame?

The fact that this happened on both your old stove and the new one suggests the issue isn't a defect in the unit, but a mismatch between your gas source and the burner setup. If you're seeing a massive orange flame that won't respond to the air shutter, you’re looking at a major fuel-to-air ratio problem. Usually, this means the orifice on the left side is way too large for the type of gas you're using. If you're running on propane but the stove is jetted for natural gas, the flame will be huge, lazy, and yellow beacuse propane is much denser and needs more air to combust properly. Since the right side is blue, it’s possible that specific burner was never swapped over during a conversion or it’s simply got a completely different jet installed from the factory. You should pull the burner cap and the spreader off to look at the little brass nozzle underneath. There is usually a number stamped on it. If the left one has a significantly larger hole than the right, there’s your answer.

That wierd sticker about outdoor systems is a huge red flag. alot of these IG-03 units are actually high-pressure burners meant for outdoor frying or camping. If you're trying to run a high-pressure stove on a standard indoor low-pressure regulator, or vice versa, you're going to get erratic performance. But if it's just one side behaving this way, it’s almost always the **orifice size** or a physical blockage in the Venturi tube that the air shutter can't compensate for.

Whatever you do, stop using that left burner inside. A yellow flame like that is a carbon monoxide factory and will soot up your pans in seconds. Check the manual or the packaging to see if it came with a conversion kit. You likely need to swap that left orifice for a smaller diameter one to get that crisp blue flame you're looking for.

That orifice thing makes sense, but I'm wondering if the regulator coud be the culprit too? I’ve got a similar setup and noticed the yellow flame gets way worse when I turn the dial all the way up. If it relly is a high-pressure unit like that sticker says, is it even safe to have in a kitchen? I’m worried about the 'closet' mention in the manual—does that mean it needs a certain amount of clearance to breathe? I’d check if there’s any dust or debris stuck in the tube on the left side too, since even a tiny spider web can ruin the airflow.

Check the Venturi tube on that left side for any obstructions. I know it’s new, but I’ve seen spiders crawl into those tubes while units sit in the warehouse—they love the smell of gas additives. A tiny web can wreck the air mix even if the shutter is wide open. As for that sticker, if this is an RV-style unit meant for a 'closet' install, it might be looking for a specific manifold pressure. If your house regulator is fluctuating, the burner furthest from the inlet usally shows the symptoms first. Have you checked if the flame settles down if you only run the left burner by itself?

That 'closet' mention usally refers to oxygen depletion sensors on indoor/outdoor hybrid units. If it's starving for air on just that side becuase of how it’s seated in the cutout, that’ll turn it yellow fast. Check if the burner head is actually sitting flush. Sometimes those IG models have a little notch that has to line up perfectly. If it’s even a hair off, air leaks in where it shouldn’t and ruins the mix before it even hits the shutter. Might be why the shutter adjustments aren't doing anything for you.