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MES30 Shut off problem

post #1 of 12
Thread Starter 

Hello,

  I have a MES 30 (20070411).  I have only had it about a year (about a dozen smokes).  I have had an issue since early on, but it seems to have become more common.  When I turn on the smoker via the control panel, it sometimes will turn off and there will be a "clicking sound".  If I unplug and replug it in, it will turn back on, but when trying to program the temp and time, sometimes it will repeat with shutting off and the clicking sound.  My best luck has been to unscrew the control panel and let it sit on the top of the smoker but not screwed in and not "hooked" into the top with the guiding screw on the bottom of the control panel.   This will normally allow it to work as long as I don't touch the controls once it has started.  Any recommendations?

post #2 of 12

Sounds like an intermittent short or beak in the controller wires. Removing the screws and moving the controller moves the wires away from where it is shorting or pushes the break in the wire to make a better connection. Remove the controller completely and give it and the wires a good inspection...JJ

post #3 of 12
Agree with jj,defenitely sounds like a loose connection.
post #4 of 12

Yes. Check the wires and connections. Try moving the wires while it is switched on to see if one in particular causes the unit to switch off. Be careful though when you do that.

post #5 of 12
Thread Starter 

Thanks guys.  I will take a look. Do you assume the issue is close to the controller since that is the only place I have access to the wires?

post #6 of 12

Most likely since moving the controller temporarily fixes it...JJ

post #7 of 12
Yea I have the same smoker and have the same problem. I called masterfully and they sent me a new digital head unit but still got the same problem so I'm thinking my problem is with the internal wiring! If you figure it out let me know because having to worry about the smoker shutting off during a cook sucks! Happy Smoking all!
post #8 of 12

+1 here

 

I got my MES for Christmas 2015, done about 6-8 smokes and it's been fine. Most of those were briskets. 

 

Got up at 4:00AM today to get a nice warm brisket for Memorial Day and worked great for the first 8 hours...then I noticed that it stopped. Unplugged and restarted, unplugged and restarted til it finally stayed. Came back an hour later....shutdown (and losing heat!) 

 

Did everyone just call Masterbuilt? What was that experience like? 

 

Much thanks!

 

kaiax

post #9 of 12
Yea just call masterbuilt and they will probably send you a new heating element or digital head unit. I ended having to buy a new unit but they offered me one at a good price. Good luck and hope you get it fixed up.
post #10 of 12

I was recently gifted a problem MES 30 with rear controls & window, model #20070411.  It has the random shutdown, shutoff problem

which was never able to be fixed even after multiple control unit changes.  Wanting to get to the bottom of the problem, I took it completely

apart and reverse engineered the electronics.  I discovered that the internal power supply is being overloaded by design.  This and poor

power distribution push it over the edge.  The box is designed with a little power supply and relay board in the bottom that connects via

a long cable to the control unit on top.  The control unit gets +5V power through the cable.  With everything turned on, the little

power supply is overloaded beyond rated capacity.  Then large power demand spikes come in from the control unit and relays which push the

voltage down hard just for an instant.  When the voltage goes down hard enough, the control unit resets itself ending the smoke and

giving you a bad surprise when you wake up.  This is compounded by trying to run power to the control unit through a long thin wire

and no large decoupling capacitors in the control unit.


The whole design is on the edge.  When you call customer service and they send out a new control unit, it's just luck that the new

Control unit + Box combination pulls it back from the edge enough to work.  Over time ageing will push it back over the edge after

you're out of warranty.  That was the experience of my boxes previous owner.  Other symptoms of the problem are shutting down

when changing temperature, changing time or turning on the light.

 

I worked up a fix that seems to work, add a large capacitor to the control unit.  The capacitor holds the voltage up enough during

brown outs to avoid reset.  It's easy to take the back off the control unit and get to the spot on the board to add the capacitor.  

These pictures show where it is.  I ended up with 1000uF just because I had a bunch laying around.  It just needs a big cap.  

You can get caps on ebay.  To get a little more soldering room to attach the cap leads, scrape some of the green coating off the

board to expose bare copper.  The left lead is Ground, the right is +V.  A 10V or higher capacitor is fine.  

 

 


Edited by James95014 - 7/19/16 at 12:15pm
post #11 of 12
To make life very simple for ya', you might consider modifying you MES with an Auber PID.

It basically involves, disconnecting the current wire to the heating element and connect a power cord directly to the element. Once done, you plug the new power cord to the Auber unit and go from there...... Never looked back 😎


Sent from my iPhone using Tapatalk
post #12 of 12

Same kind of thing here for me.  After disconnecting and reconnecting the wires under the control it has been working.  Although I smoked a couple pork shoulders last night and when I came out to spritz and foil it was hot.  I noticed smoke coming out from under the control panel.  I moved the control panel and saw that smoke was coming out of the hole the wires go into.  Smoker well on its way to 300 so I turned it down to 100 and moved the meat to the oven in the house.  Came back outside and the element is still glowing red hot even after I set it to 100.  So I turn it off and watch to see if the element starts to cool.  It doesn't.  Still glowing red hot.  So I decide to disconnect both wires of the control unit and the element won't turn off.  It doesn't turn off until I unplug the power.  Looks like I'll be calling Masterbuilt.   

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