My MES140 controller dead!

  • Some of the links on this forum allow SMF, at no cost to you, to earn a small commission when you click through and make a purchase. Let me know if you have any questions about this.
SMF is reader-supported. When you buy through links on our site, we may earn an affiliate commission.

Rusty Zipper

Newbie
Original poster
May 10, 2019
27
4
My controller box on top of the smoker went d.e.d. dead. It gave me trouble about three or four times but I "dried" it out with a hair drier. Then it worked. I wasn't comfortable with it but it was just part of the process. It didn't want to work last time so I brought the controller inside. The next day it worked. So I bought the new one and I anticipate no problems. But I decided to leave it inside and take it out to the smoker to plug it in as I need it. I'm tired of made in China crap. I didn't contact the company as I have heard they can be a pain. I've worked 23 years in corrections and have little of my youthful patience left. And yes, I lost my give-a-&^$*YRHBSCJN. Any one else with a similar problem on their smoker? Be Well, RustyZipper.
 
There was a forum post maybe a week ago where someone had a controller on their MES die. They opted to use a PID controller from amazon instead of replacing the MES controller. That may be cheaper, and would certainly be a bit better to use. Would recommend going that route.
 
There was a forum post maybe a week ago where someone had a controller on their MES die. They opted to use a PID controller from amazon instead of replacing the MES controller. That may be cheaper, and would certainly be a bit better to use. Would recommend going that route.
 
I replaced it with another one just like it but keep it in the house. Then I plug it in when I need it. I was wondering what other folks are doing. Now I know what some are doing. Thanks and Be Well, Rusty.
 
If I remember correctly, I think the PID that was linked to on amazon was about $50. If your controller dies again, would definitely recommend this instead. Even if it doesn't and you have some extra money I would recommend doing this eventually.
 
My controller box on top of the smoker went d.e.d. dead. It gave me trouble about three or four times but I "dried" it out with a hair drier. Then it worked. I wasn't comfortable with it but it was just part of the process. It didn't want to work last time so I brought the controller inside. The next day it worked. So I bought the new one and I anticipate no problems. But I decided to leave it inside and take it out to the smoker to plug it in as I need it. I'm tired of made in China crap. I didn't contact the company as I have heard they can be a pain. I've worked 23 years in corrections and have little of my youthful patience left. And yes, I lost my give-a-&^$*YRHBSCJN. Any one else with a similar problem on their smoker? Be Well, RustyZipper.
I'd bring the controller inside when not using it, out of the humidity. MB doesn't have a conformal coating to protect the circuit board an its components from dust, humidity etc. The tiny pin connectors look fragile so the locking clips on the side may be bent outward so your not fighting them every disconnect and I'd mark one side of each pin connection with liquid paper etc so each connection is easy to hook up at a glance and not bend the tiny pins from connecting one pin half upside down.
 
If I remember correctly, I think the PID that was linked to on amazon was about $50. If your controller dies again, would definitely recommend this instead. Even if it doesn't and you have some extra money I would recommend doing this eventually.
HOW ABOUT A LINK TO THAT UNIT.
 
There's no substitute for a quality cover.I know a lot of folks here don't use one but imo that's just asking for trouble.
 
Thanks, I thought the PID has to be wired in so it over rides the factory controller. Still beyond my understanding.
 
Nope, you just set the temperature on the PID, and it controls the voltage to the heating element, turning it on and off as needed to maintain the set temperature.
 
I replaced it with another one just like it but keep it in the house. Then I plug it in when I need it. I was wondering what other folks are doing. Now I know what some are doing. Thanks and Be Well, Rusty.
I put a 4” diameter by 6” long black ABS pipe over the vent as a chimney. It diverts the warm moist above the controller. In my case the exhaust was drifting between the controller and the cabinet resulting in erratic temperature reading on the controller. This was a sporadic issue but hasn’t happened since I put the chimney on.
 
Thanks, I thought the PID has to be wired in so it over rides the factory controller. Still beyond my understanding.
If you have a digital stock controller , you do need to by pass it . I know it's hard to understand ,, but it's pretty easy to do . If you're interested in doing the upgrade start a thread and we'll get you the help you need .
 
  • Like
Reactions: sawhorseray and PAS
I put a 4” diameter by 6” long black ABS pipe over the vent as a chimney. It diverts the warm moist above the controller. In my case the exhaust was drifting between the controller and the cabinet resulting in erratic temperature reading on the controller. This was a sporadic issue but hasn’t happened since I put the chimney on.
I found a white 6" PVC coupling and it sits where the handle attaches to the smoker around the top vent for the same reason. It's open at the bottom so no increase in smoker drafting and it's heavy enough the wind can't move it so it's a great wind deflector, keeping wind from drawing out heat and blowing into the smoker. It holds a baking sheet with food like an elevated pizza tray holder in restaurants to not take up table space. It's a temporary place to set something because the smoke can go out the bottom till I remove the tray. Great for windy days. 20171219_144542.jpg
20170320_143220.jpg
 
  • Like
Reactions: Murray
I replaced it with another one just like it but keep it in the house. Then I plug it in when I need it. I was wondering what other folks are doing. Now I know what some are doing. Thanks and Be Well, Rusty.

Hi there and welcome!

So you have a couple of options. You can try more of the Masterbuilt controllers and do what you are doing BUT the controller is 1 of the 2 most common failure points of the MES... as you are finding out.

The other option is to do a very simple rewire (cut ends of 4 wires and splice to become 2 wires) to your smoker and use an alternative controller like the one posted on Amazon or use a PID controller.

This controller from Amazon behaves in a very similar manner that the stock MES controller behaves in:
You still MUST rewire the MES to use this controller.
After the rewire of the MES the cord of the MES will simply feed power to the heating element, it is now dumb and is either on (plugged in) or off (unplugged).

So after the rewire u plug the dumb MES' cord into this kind of controller and then plug this controller into the outlet and set a temperature. Next throw the temperature probe into the smoker and the controller will cut power on/off to the MES cord in order to hit and try and maintain the set temperature as it measures the temp in the smoker.
This kind of controller is pretty simple, it will swing up and down around your set temp like the original masterbuilt controller BUT will possibly be more precise and have lower temp swings... you wont know until you try it.


The PID controller option is MUCH MUCH more precise but costs more money.
If you don't already have the tools, supplies, extra parts, and the knowledge, then buying a plug and play PID controller is more cost effective and simply a better option than building one.

For $150 you can get a true PID controller here:

The PID controller will hook up the same way as described with the Amazon controller BUT the PID controller can hold within 1-3 degrees of the set temperature once the P-I-D parameters are tuned and set (u can run auto tune to get close or ask someone here for their parameter values).

The PID controller seriously turns your smoker into a completely different animal that is much much much better than the MES you bought brand new.
With such tight temperature control you can have your smoker operate from 1-275F degrees with ridiculous precision.
This means no temp swings to ruin sausage or bacon by accidentally swinging so hot the fat starts to render. This means doing cold smokes in cold areas of the country where you may want to set the smoker to 20F just to create draft to move the cold smoke to keep it form getting stale and leaving horrible stale flavor on your items.

Also if u get this exact PID controller you can move up to a MES40 and rewire the MES40 and be ready to rock and roll.
To me the BEST thing to do is to buy a used MES40 for like $40-50 on craigslist, rewire it and slap this $150 PID on it and you have a smoker that is less expensive and 50X better than a brand new MES40.

In all these rewire situations you lose the ability to put woodchips in the smoker and have them make smoke BUT 99.9% of MES users dont use that and instead use the A-Maze-N Pellet Smoker (AMNPS) tray or tube to produce perfect, no hassle, long running smoke for hours so it's not really an issue.

I've thrown a lot at you here so I'll stop rambling now hahaha. Let us know if this makes any sense and if you have any questions... oh and if u want to read about the rewire job you can here:
https://www.smokingmeatforums.com/threads/mes-rewire-simple-guide-no-back-removal-needed.267069/
 
Hi there and welcome!

So you have a couple of options. You can try more of the Masterbuilt controllers and do what you are doing BUT the controller is 1 of the 2 most common failure points of the MES... as you are finding out.

The other option is to do a very simple rewire (cut ends of 4 wires and splice to become 2 wires) to your smoker and use an alternative controller like the one posted on Amazon or use a PID controller.

This controller from Amazon behaves in a very similar manner that the stock MES controller behaves in:
You still MUST rewire the MES to use this controller.
After the rewire of the MES the cord of the MES will simply feed power to the heating element, it is now dumb and is either on (plugged in) or off (unplugged).

So after the rewire u plug the dumb MES' cord into this kind of controller and then plug this controller into the outlet and set a temperature. Next throw the temperature probe into the smoker and the controller will cut power on/off to the MES cord in order to hit and try and maintain the set temperature as it measures the temp in the smoker.
This kind of controller is pretty simple, it will swing up and down around your set temp like the original masterbuilt controller BUT will possibly be more precise and have lower temp swings... you wont know until you try it.


The PID controller option is MUCH MUCH more precise but costs more money.
If you don't already have the tools, supplies, extra parts, and the knowledge, then buying a plug and play PID controller is more cost effective and simply a better option than building one.

For $150 you can get a true PID controller here:

The PID controller will hook up the same way as described with the Amazon controller BUT the PID controller can hold within 1-3 degrees of the set temperature once the P-I-D parameters are tuned and set (u can run auto tune to get close or ask someone here for their parameter values).

The PID controller seriously turns your smoker into a completely different animal that is much much much better than the MES you bought brand new.
With such tight temperature control you can have your smoker operate from 1-275F degrees with ridiculous precision.
This means no temp swings to ruin sausage or bacon by accidentally swinging so hot the fat starts to render. This means doing cold smokes in cold areas of the country where you may want to set the smoker to 20F just to create draft to move the cold smoke to keep it form getting stale and leaving horrible stale flavor on your items.

Also if u get this exact PID controller you can move up to a MES40 and rewire the MES40 and be ready to rock and roll.
To me the BEST thing to do is to buy a used MES40 for like $40-50 on craigslist, rewire it and slap this $150 PID on it and you have a smoker that is less expensive and 50X better than a brand new MES40.

In all these rewire situations you lose the ability to put woodchips in the smoker and have them make smoke BUT 99.9% of MES users dont use that and instead use the A-Maze-N Pellet Smoker (AMNPS) tray or tube to produce perfect, no hassle, long running smoke for hours so it's not really an issue.

I've thrown a lot at you here so I'll stop rambling now hahaha. Let us know if this makes any sense and if you have any questions... oh and if u want to read about the rewire job you can here:
https://www.smokingmeatforums.com/threads/mes-rewire-simple-guide-no-back-removal-needed.267069/
Can you tell us how the $50. plug in unit works if you DONT rewire the MES. Just what is happening. Thank you!
 
My MES40 Gen1 was dead when given to me. I went straight for the above Auber PID controller. I attached a power cord to the ends of the heating element which now plugs directly to the Auber PID unit, bypassing the MES controller all together. So simple, so perfect. Oh and while I was at it, I flipped the heating element over so now it is more centered in the smoker.
 
I replaced it with another one just like it but keep it in the house. Then I plug it in when I need it. I was wondering what other folks are doing. Now I know what some are doing. Thanks and Be Well, Rusty.


What are others doing???
Well Some guys fix there own, or get help from one of the electronic geniuses on this form.
One is " tallbm tallbm ".
Some have had Great success getting help from Masterbuilt.
Some have switched to a PID in their unit, and seems they're all very happy.

As for me, I've just been plugging mine in whenever I want to use it for the last 10 years, without problems. I do keep a cover on it, on my front "Covered" Porch, but I have never brought a controller inside my house, to stay warm.

Bear
 
  • Like
Reactions: sawhorseray
I followed Tallbm's advice and went with the Auber unit and his rewire instructions a year ago and am very happy with the results. My MES smoker is now a GREAT smoker.
 
SmokingMeatForums.com is reader supported and as an Amazon Associate, we may earn commissions from qualifying purchases.

Hot Threads

Clicky