Low flame, grill only heats to 250 degrees. Have performed all tasks in Owners Guide including cleaning burners. Have rotated propane tanks with no improvement. Sometimes third burner won't light at all. Have also notice occassional "whistling" sound when turn on main tank valve.

Turn off propane. Disconnect propane tank from barbecue. Open burner valves for about 20 seconds. Close valves. Reattach propane tank. Slowly open propane tank valve. Turn on burner and ignite

If you're turning off your propane tank after each use (which is fine), you will need to turn it back on very, very slowly. The new OPD valves that are now required on all portable propane tanks, will lock up the regulator if it's turned on to fast. Also, check all the pilot orifices for clogs. And finally, be sure you have enough gas in the tank.

Close the air vent on the burners to get more flame if that does not work you have a bad thermostat!

yes you can use some oven cleaner on them

I had this problem with a brand new grill so it wasn't grease in the hose. Due to the new propane regulators you have to turn the propane tank on for at least a minute before turning the grill to light. Let the tank sit in the light position for five seconds and then you light the grill. This will keep air from getting into the intake hose and will keep your gas flame roaring high.

I was only able to get the grill up to 250 degrees before I found this fix posted on the Weber site. It is listed as the number one solution in the FAQ section.

If your propane gas delivery system is equipped with a pressure regulator, check it or replace it. If no regulator, check the following:

* The gas jets for any obstructions, including carbon build up (they can be cleaned with an automotive fuel injector or carburetor cleaner with a lttle help from a brush bristle - do not try and use a drill or other mechanical means)

* The gas connections, and make sure they are all tight

* The gas manifold(s) to be sure they aren't partially obstructed with insect nests, especially cocoons

* The burner(s) to be sure they are clean and that the flame is even

This can be caused by the safety valve in the propane tank. Most times this can be corrected by tuning off the valve on the tank, make sure all the controls on the grill are in the off position. Then turn on the tank valve and try restarting the grill. All the controls on the grill must be off, before reopening the tank valve. If that does not work try another propane tank.

Mike, I had this problem with my grill once or twice. Like most of us grilling men we turn the grill off at the tank trying to be safe. Sometimes, like in my case, I do not turn the nobs back to the off position. When returning to the grill the next day or week the first thing we do is turn the gas on leaving the nobs on, then lighting. Every time I do this my flame never gets full or does not reach full temp. To resolve this: turn everything off including the nobs, then turn the gas on, wait a minute or two. Turn the nobs to full and ignite. It should be at full flame then, adjust from there. I hope this is helpfull.

Check your instruction manual, you have probably set off the safety valve in your propane tank. It is set to trigger if there is an open connection, such as turning on the jets when the tank is turned off. You may have to re-connect the tank...careful of course, make sure it's valve is off.

sudsy, this exact same thing would happen to me every time I changed a tank. I know it's nothing to do with the grill itself. I would have to seat and reseat the regulator hose to the tank a couple of times before it would start heating normally. Your model has 3 burners and I suspect that the flame is real low on each one even on the high setting. Try connecting and disconnecting the tank a couple of times and see if it comes to life. If worse comes to worse you can order a new regulator hose. Part number P3632L. Catriver..post back.