My traeger will smoke but not light

Do you get an error messsage that looks like LEr? If a Traeger can't reach 125 for ten consecutive minutes, it will automatically shut down. Try starting at a higher temperature than "Smoke" if it's cold outside. Traeger also makes "blankets" to help your smoker maintain temp in cold climates, but they're quite an investment.

Fire underneath?

This is a common complaint about Traeger grills. Some people have resolved it with smoke pipes which contain pellets that smolder during the cooking process.

Others use different pellets than Traeger pellets but they void their warranty when they do. For me, Traeger pellets seem to put out enough smoke at the low temperatures I use (less than 200 degrees) but if I get above 200, the smoke goes sway.

When I cook pork shoulders, I try to keep the temperature at 180. In ideal conditions the Traeger will fluctuate between 160 and 200, averaging 180. If I can maintain this low-slow cooking temp-speed, I get a good smoke ring and decent smoke flavor.

If I get above 200, I lose much of the flavor but usually have a smoke ring though not as intense as at the lower temps. There are lots of conversations about this on blogs at the Traeger website and at the Pelletheads website.

Have you cleaned the ash out of the firepot? I clean mine with a shop vac after every five or six uses because the ash builds up and "insulates" the fire, keeping air from the fan reaching it so it just smolders and never really gets hot.

Sounds like you need to replace the hot rod. Contact Traeger on their website at www.traegergrills.com for parts and instructions.

It could be it just needs a clean bottom tray under burners could need cleaning

May be too much moisture on the hot rod.

From Traeger:
Why won't my Grill Ignite?

1. If your grill is plugged into an electrical outlet with a GFI (ground fault interrupter) plug, chances are the hot rod has absorbed or been exposed to too much moisture and is leaking to ground causing the plug to trip.
2. Open your cooking chamber lid, remove cooking grill, angled drip pan and U-shaped firepot cover. Is there ash build up in the firepot and/or around the firepot? If so, this needs to be cleaned out. The ash is choking out the fire.
3. Check the fuse on the back of the control board. To do this, first UNPLUG the grill from the electrical outlet. Then, unscrew the control board and look at the fuse-is it blown or not?
4. If the fuse is good, check for power by switching the colored plugs first. Unplug the purple plug and the orange plug. Plug the purple plug into the orange plug. Now plug the power cord back into the electrical outlet and turn the grill on. Does the induction fan operate? If so, you will need a new hot rod and fuse. If not, you will need a new control board. Unplug the purple from the orange and reconnect the plugs together to their correct color plug.
5. Always start your grill on the SMOKE setting.

Call Traeger direct.
You have a bad control unit
Mike Treager is really good about replacing anything that goes wrong

It is the igniter inside the grill where the pellets come out it is bad you have to replace it!