Central to all pellet cookers is a digital controller similar to the controllers on modern indoor ovens. You select a temp you want, and there is an LED display that tells you the actual temp. Some of the controllers also are programmable so you can cook at a certain temp for a determined time. Some have leave-in meat probes that can dial back the ovento a holding temp when the meat hits its mark.
I have found that using the upper shelf gets more airflow around the meat than the lower shelf. I asked the AmazingRibs.com science advisor Prof. Greg Blonder about the problem (he has a MAK 1 Star). He explained that smoke sticks to cool surfaces and wet surfaces, and the surface of meat warms and dries out after a few hours. When he wants more smoke flavor he uses a strong smoke wood like hickory or mesquite, he starts with cold meat, and then he keeps the meat moist by painting or misting it with apple juice or a mop like Lexington Dip or East Carolina Mop or Texas Mop Sauce. A awter pan can help because the water condenses on the cool meat and attracts smoke. Read his detailed research on the subject in my article on the Science of Wood and my article on Basting.
You’re concerned with ongoing costs for fuel and power: The wood pellets used with Traeger grills are more expensive than propane or charcoal. You can expect to spend $1 to $3 per grilling session using wood pellets. Propane is far less expensive to operate in a grill, while charcoal fits somewhere in the middle of the cost range. And beware of cheap pellets from third-party manufacturers that contain softwoods like pine. They burn much faster than hardwoods, so the end cost won’t be that much different because you’ll use more of them. And they can introduce unwanted chemicals and contaminants to your food. You will also have some electrical power costs with these Traeger pellet grills.
But as said, there are a few things we don’t like; it’s relatively small, doesn’t have a lot cooking space, and the design feels cramped. At the same time, it’s still relatively heavy at 140 lbs. For the same price, you could choose the Z-Grills Master 700D, which packs almost 25% more surface area on the rack. That doesn’t seem like much but is a significant amount of room.  Or you could just spring for the Traeger Pro 22. There have also been reports of poor quality control, and that the temperature control is very inconsistent, often swinging up and down nearly 30 or 40 degrees.
Pellet cookers usually have an auger or another feed mechanism that pushes the pellets into a burn pot typically about the size of a beer can ripped in half. An igniter rod sits in the bottom of the pot and when you turn on the grill it glows like the element on an electric stove. As the pellets ignite, a fan blows to feed them oxygen, and the igniter shuts off. The Traeger L'il Tex, an inexpensive model, draws 300 watts an hour while the igniter rod is on in the first four minutes, then it drops down to 50 watts an hour for the duration of the cook session, less than a standard light bulb.
For me, I don't care where it is built; it could be Oregon, China or the moon. But I want a smoker that is reliable. As a businessman, I don't understand this company. It is going to be a lot more expensive for the company when I return this thing to Costco and Costco makes Traeger take it back. Just being responsive and sending a new controller under warranty would seem to be easier and cheaper. Of course, if this was a normal company, they would fix the root cause (poor reliability) and make lots of money selling to happy customers. Read more
Built from substantial stainless steel, the SmokePro looks bombproof and weighs a hefty 140 lbs – so it’s not portable like the Z Grills or Traeger Junior Elite. It has a stainless-steel probe to directly monitor meat, and a sensor for the grill’s internal temperature. Both read out on the LED display next to the digital controller, which goes from 160F to 500F in 25-degree increments.
You want a set-it-and-forget-it option: Traeger grills work best when they’re allowed to cook and smoke the food over long periods of time. As long as the system has fresh wood pellets in the hopper to feed the fire box, it will be able to maintain a steady temperature. So you can set up the grill and then leave it for half an hour, a couple of hours, or even longer, something that’s difficult to do with other grilling systems.

So Kevin here is where you come in. Been wanting to make getting consistent Q on the table regularly and easily. Been looking at pellet poopers for about 5 years now and decided to take the plunge. Had already done enough looking a few years ago Traeger’s issues had scared me off. Several friends had them and raved but always mentioned problems. I decided from my work I don’t want to be buying someone’s, ‘we know the problems and are fixing them’ if you can find something solid for similar cost. Yoder and FEC were pretty much my finalists. So I was doing my final thoughts and found your article.

I did a lot looking around at pellet smokers before buying the ys 640. This thing is amazing! I have been cooking BBQ for about 15 years. I owned a Gator pit entertainer which is made in Houston Texas (stick burning pit) and I currently own a $25,000 Ole Hickory Pit EL-EDX which can cook 700 lbs of BBQ at once. I wanted something smaller to cook for family. The ys 640 turns out PERFECT Q every time! The amount of smoke is just right. Plenty of smoke flavor without over smoking which is very easy to do in my other pit. This is an EXCELLENT product which I strongly recommend.

If you live in an area where wood furnaces are used (not like down here in FL where a few heat strips will do the trick), you may also be familiar with pellet furnaces. In short, pellets compressed from sawdust and wood shavings fill a hopper and are then fed into a burn pot using an electric auger system. The auger, which is basically a long screw, delivers pellets to the burn pot based on the speed dictated by the unit’s thermostat.