Masterbuilt Smoker Issue

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Bramic71

Newbie
Original poster
Apr 5, 2020
10
1
Hello everyone. Newbie here. I have a question about my Masterbuilt John McLemore Signature Series Propane Smoker. I just acquired this smoker over the weekend, and had the thought of smoking on it yesterday. I lit the burner, which worked fine. It had a nice small blue flame. As I turned the gas control valve/temperature gauge up, the flame size stayed the same. That is until i went over the 250 degree mark. The flame then got noticeably stronger. I left the valve in this position to see what the flame would do. Over the next couple of minutes the flame died down on it's own, until there was barely even a flame. I have tried two different tanks with the same results. The only thing i can think, is that possibly the gas control valve is bad. What do you guys/gals think the issue could be? Also if the problem is the gas control valve, where can I get one? I cant seem to find anything on the internet when I search. Thank you for your responses.
 

bradger

Smoking Fanatic
Aug 12, 2019
446
419
northern NJ
i was thinking the valve, with my gas grill this sometimes happens, but it works if i turn off the gas then back on it works fine, check in hardware stores for a new valve, also check for leaks. the valve could be sticking and the heat losens it, i have no idea why it goes down again.
 

Bramic71

Newbie
Original poster
Thread starter
Apr 5, 2020
10
1
i was thinking the valve, with my gas grill this sometimes happens, but it works if i turn off the gas then back on it works fine, check in hardware stores for a new valve, also check for leaks. the valve could be sticking and the heat losens it, i have no idea why it goes down again.
It's strange. There is no change in flame until the knob is almost all the way open. After that it dies down on it's own to almost nothing after a couple of minutes. Are those replacement valves pretty common at stores? I called Masterbuilt but they are closed.
 

Bramic71

Newbie
Original poster
Thread starter
Apr 5, 2020
10
1
thought that too, replace the hose shoild be easy enough to find in any hardware store or any where that sells grills.
I know that when I remove the hose from the tank, it doesnt just hiss and stop. For a few seconds propane continues to come out of the disconnected hose. Is this normal?
 

SecondHandSmoker

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Jun 30, 2018
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SE Arizona
I know that when I remove the hose from the tank, it doesnt just hiss and stop. For a few seconds propane continues to come out of the disconnected hose. Is this normal?

That will be normal when the line is full of propane.
For safety purposes, I always turn off the propane at the tank while the burners are lit.
This evacuates the gas and pressure from the line.
 
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Bramic71

Newbie
Original poster
Thread starter
Apr 5, 2020
10
1
That will be normal when the line is full of propane.
For safety purposes, I always turn off the propane at the tank while the burners are lit.
This evacuates the gas and pressure from the line.
Went by the hardware store. Replaced the hose and regulator. There was no change. Still had the same results.
 

SecondHandSmoker

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Jun 30, 2018
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Went by the hardware store. Replaced the hose and regulator. There was no change. Still had the same results.

Okay.
We've eliminated the regulator.
So, as bradger said, start checking for clogs, especially the burner and venturies.
Keep trying Masterbuilt customer service as well since it could very well be the control valve. They do go bad too.
Doubtful you will find a new control valve on appliance repair part websites but it is worth a shot.
 

Winterrider

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Sep 29, 2018
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My ice house heater use to do that same thing "if" you opened the tank valve to quickly. Hate the new valves. Doesn't hurt to blow out the orfice and whatever else you can.
 

Bramic71

Newbie
Original poster
Thread starter
Apr 5, 2020
10
1
Okay.
We've eliminated the regulator.
So, as bradger said, start checking for clogs, especially the burner and venturies.
Keep trying Masterbuilt customer service as well since it could very well be the control valve. They do go bad too.
Doubtful you will find a new control valve on appliance repair part websites but it is worth a shot.
Will do, and thank everyone for the help. I called Masterbuilt and they are closed due to this sickness. I'm thinking valve myself.
 
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SecondHandSmoker

Master of the Pit
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Jun 30, 2018
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SE Arizona
Will do, and thank everyone for the help. I called Masterbuilt and they are closed due to this sickness. I'm thinking valve myself.

Wish we all could have solved this so you could do some smoking this weekend.

As for Masterbuilt, they do have a customer service conact form on their site which they say is the preferred method of contact.

 
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Bramic71

Newbie
Original poster
Thread starter
Apr 5, 2020
10
1
Wish we all could have solved this so you could do some smoking this weekend.

As for Masterbuilt, they do have a customer service conact form on their site which they say is the preferred method of contact.

Wow. Masterbuilt got back with me and quoted me $160 for the valve.
 

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