Low flame propane flow is so small that the first burner goes out when lighting a second--3 year old grill

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

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

Mike, your gas regulator is locked up. To solve the problem, do the following.

1. Turn the tank valve OFF and disconnect the hose from the tank.

2. Wait 5 minutes and reconnect the hose to the tank.

3. Open the tank valve VERY, VERY SLOWLY (Slow motion, slow) until the valve is fully open.

4. Light on burner and turn it to HIGH. Does the flame height look correct? If so, light the other
burner the exact same way. Do both flame heights look correct? If so, you solved the problem.

In the future, always remember to turn the tank valve ON very, very slowly.

If the above didn't solve the problem. You will need to replace the grill's Hose/Regulator Assembly. You can pick one up from any hardware store or home center that sells gas grills & accessories for about $30.00. Take you old one with you for comparison purposes.

Hope this helped you to troubleshoot and solve the problem. Happy Grilling!!

It sounds like it needs a good clean!

The new style OPD valves have a small brass ring located in the female fitting on the LP tank. Over time this ring can work loose and then it does not allow the male fitting to fully depress the OPD valve thus reducing your gas flow
Using a small flat bladed screw driver tighten the small brass ring This should solve your problem

May likely be low on propane or propane tank gate valve not opened far enough. Otherwise sounds like faulty regulator.

Regulator is not bad, as I stated before new valves are designed to reduce gas flow if valve is opened to fast. This is so if grill catches on fire, the tank will shut itself off, thus propane will stop flowing causing fire to extinguish itself.

check for leak if it is propane if no leak most likely regulator and hose

it sounds like it is a natural gas grill instead of propane change out your orifices

I had this same problem especially when the tank on my 5 burner 2 year-old Kenmore was about half full. The solution above fixed it. I was used to opening the gas fully, turning one burner to high and clicking the button. If I would have read the front of the grill I would have seen that this was incorrect. I turned off the grill completely, unhooked the regulator and reconnected it. With one burner on high I began clicking the button BEFORE I turned on the gas. I slowly turned the gas on one quarter turn and it lit up full flame. I slowly turned the gas another quarter turn and lit the second burner. I slowly opened the gas all the way and lit the third and so on. That did the trick!