Why Weber Gas Grills Have Temperature Regulation Problems

Weber gas grills have a solid reputation for durability; they should last a minimum of 10 years when properly maintained, which means at least a decade of sizzling steaks, charred vegetables, and perfectly rendered burgers. Yet sometimes the worst happens — you light your grill one day, and despite waiting forever for it to heat up, it never does. You keep your grill covered as you should, and clean it regularly. So what gives? Why won't it come up to temperature (and then stay there)? There could be a number of issues, but a common one is that the pressure regulator needs to be reset.

The pressure regulator has a safety mechanism called bypass mode, which is meant to detect when there is a propane leak. Sometimes, through user error, typically because you lit the burners in the wrong order, the pressure regulator thinks there is a leak when there isn't (it can also occur thanks to an intangible "just because"), so it won't let your Weber grill get truly hot — you know, to prevent an explosion. Thus, you have to perform a manual reset, which is, luckily, very easy to do. To do so, close the valve on the tank, nix all the burners, open the lid, and then open the tank valve completely. After waiting several seconds, turn the left-most burner to high, press ignite until your burner is lit, and turn on all the other burners, using the same steps. If your grill gets up to 500 Fahrenheit in 15 minutes, you've successfully reset things.

To avoid your grill going into bypass mode in the future, ensure all of your ignition knobs are in the off position, and then turn your gas on. The key is to give it a few seconds for the pressure to build up before lighting the grill as per usual. You shouldn't have an issue keeping the temperature regulated moving forward.

If you tried to reset the pressure regulator to get it out of bypass mode, but your Weber gas grill still won't get hot, don't fret. You haven't exhausted all the possibilities. If, for example, you own a fancy Genesis II LX model, you might actually be setting the knobs to low when you think the setting is on high. There are six settings on the Genesis II LX designs, two more than most other Webers, which can make the fact that the "start" setting is the same as "high" even more confusing, especially if it's the first time you're turning on your grill.

Also, we hesitate to suggest this as it might seem obvious, but have you considered the level of your propane tank? Obviously, if you just purchased a new one or had it refilled, that won't be your issue, but if you can't remember the last time you topped it up, it could just be that there isn't enough propane to sustain the heat (they have a lifespan of about 20 hours of grilling time). It's easy enough to check how much is left; just do the water test, where you pour warm liquid down the side of the tank, then feel where the cold part (the actual propane) starts.