Propane tank knob is stuck

follow this steps and fix it. God bless you
Test the propane tank valve for leaks:

1. Turn the grill control knobs on the front (and, on some models, the side) of the barbecue to the off position.
2. Turn the propane tank valve fully counterclockwise to close it.
3. Mix a test solution of equal parts of dishwashing liquid and water in a small container.
4. To test for leaks, apply the test solution liberally to the connection between the regulator fitting and the tank valve using a small paint brush. Apply the test solution to the valve handle and threads, the length of the hose, and the connection between the hose and the regulator. If bubbles appear at any point, there is a gas leak.
5. Tighten the connections and retest.
6. If you still see bubbles at any of the tested connections, close the tank valve and replace the leaking component.

Test the hose fittings for leaks:

1. With the tank valve open, brush the test solution on the fitting at the other end of the hose, located under the control knobs.
2. Turn the control knob to high and test the hose and fittings leading from the control knob to the grill. Turn the right control knob to off. Repeat the process for the other control knobs.
3. If you see any bubbles during any of these tests, close the tank valve and contact your propane dealer or your local gas utility. Do not use the barbecue until the leak is corrected

Are you asking about how to loosen the knob on the tank or how to remove the tank from the grill's holder?
If you're trying to turn the tank valve to ON, you turn the knob Counter Clockwise. If you trying to remove the On/Off knob itself, you remove the screw in the center of the knob. Most require a Star Head screw driver of bit to do this. Be sure the tank valve if completely OFF, before attempting this.

To remove the tank from the grill holder, simply lift the holder off the top rim of the tank. It may be snug, so it sill require some force.

Hope this helps you solve the problem.

A couple of things come to mind:

Restricted air flow. Check heater inlet and outlet. Remove any obstructions.

If the heater has been used in a dusty environment, it may simply need a thorough cleaning.

Inadequate propane supply. Make sure there's enough gas in the tank to facilitate combustion.

If the tank is full, turn of the tank valve and disconnect the hose from the tank. Wait 5 minutes and reconnect the hose. Turn the tank valve on very, very slowly, until it's fully open and try relighting and operation of the heater.

If you have misplaced your Owners Manual, you can find it at www.deastech.com

Hope this helps to solve your problem.

It will probably be one of two issues. Either the waterflow sensor is not working correctly or the propane valve connected to to control knob is stuck shut. The water flow sensor is located on the side of the copper element (grey box) check that it spins easily. The propane valve is attached to the control knob by a long metal wire and should turn freely as you turn the control knob to warm

the regulator could have gone into lock up.
try this to unlock it...

1. Open the BBQ Lid
2. Turn ALL main control knobs to the "OFF"/CLOSED position
3. Turn the Propane tank valve to the "OFF"/CLOSED position
4. Disconnect the Regulator hose from the Propane tank
5. Turn ALL main control knobs to the "ON"/OPEN position
6. Let stand for 1-2 minutes, allowing all excess gas in valves and manifold to dissipate
7. Turn ALL control knob back to the "OFF"/CLOSED position
8. Reconnect the regulator hose to the Propane tank- hand tighten only.
9. Check all hose connections to ensure that a positive seal has been made
10. SLOWLY turn "ON"/OPEN the propane gas supply
11. Wait approximately 5 seconds for the regulator pressure to stabilize
12. Turn "ON"/OPEN the selected burner control knob to "HI"
13. Press the Multi Spark ignition button or match light selected burner.
14. Hope this helps you has me in the past!

The Pressure Regulator may be stuck, Try closing the propane valve releasing the pressure,, gently tap the regulator( on the propane inlet side) and Very Very slowly open the propane tank valve, and attempt to light

Hi John,

I just experienced the same exact problem ! I just bought a brand new Weber E-310 a 3 burner grill.
After I seasoned it up with cooking oil,I turned all the burners to high, opened the tank and clicked electrnic button several times , the grill was on then I went inside, I came out about an half-hour later and it was saying around 275 degrees..
I looked into my manual and there is a gas limit control valve that shuts down gas flow, when it thinks there is too much gas flow.

Sloution;
Turn the propane gas knob to off
Turn the gas grill knobs to Off.
Click the igniter several times to clear out any gas.
Then unscrew the regulator from the tank,( I then blew into the tank hole and regulator),
Screw back on the regulator to the propane tank.
I then clicked igniter again couple of times.
Now open your propane tank.
Then turn on front burner while clicking igniter, this will lite 1st burner.
Then turn 2nd burner on low then to high.
And if you have 3rd burner or more, turn low then to high!

John I did this and my grill went to 600 plus in a few minutes!!

The problem was turning the gas grill knobs on first then opening the tank then lighting...
You have to open propane tank with knobs off, THEN AS SOON AS YOU TURN ON 1ST KNOB, YOU MUST IGNITE ...

When you turned the oven off, if the ignitor went off and the gas kept flowing then the thermal valve is defective. Maybe that was the problem all along.

I switched to the new style 20# tank with the new turn-on knob.  I couldn't get enough gas pressure to the BBQ burners for all three burners to light or to keep a strong flame on even one burner.  The new style tanks have a safety valve on the inside of the tank that shuts the gas off if you turn the knob on too fast because the safety valve thinks there is leak.  Shut everything off and then try turning the knob on real slow, especially at first, before turning it all the way on.  If that doesn't work (it didn't for me), then replace the large plastic connection valve knob (female end) that attaches the regulator to the tank.  Mine was for the old style tank and was black (low pressure).  I went to a propane company and had them replace it with a green knob (higher pressure).  Took it home and WALA!  Everything works fine now.  But it was very frustrating trying to figure why I couldn't get any gas to the burners after buying a brand new tank.  I hope this helps solve your problems.   

Ok on the propane tank valve there will be a black assy. connected to the output side of the valve, if this is the black knob you are talking about it might be stuck if this is the case you might take a pair of slip joint pliers and try taking it loose that way looking at the knob from the front with the tank behind you it will turn counter clokwise to loosen it.

Hope this helps Ya
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