Too Much Ash and Ignition Problems

Can ash stop my grill from lighting?

Yes, according to one maker's guides. It says that if the fire pot isn't vacuumed out regularly, the fire cannot light and burn properly¹.

Another line from the same maker is about troubleshooting. If your grill's controller runs but no fire starts, and the pot hasn't been vacuumed recently, do that first, because a deep bed of ash can smother the fire².

Why does that happen? The igniter rod lights the pellets³. If ash is in the way, the pellets may not touch it. In one example the maker shows, the entire pellet feed tube was covered and there was no way for new pellets to contact the ignition rod¹.

Can it cause a flameout?

A flameout is when the fire dies while you're cooking. The same maker says an overfull pot means the fire can easily die mid-cook, with temperatures dropping and spiking¹.

There's a pellet angle too. The fire might keep going out after a few hours, with pellets that aren't moist. Then the maker says the pellets may be producing too much ash, which smothers the fire². You'd see it straight away when you look in the pot.

What should I check, in order?

Treat the list below as a starting point drawn from one maker's guide. Your own manual and its troubleshooting section come first.

• Let the grill go cold first. This maker's cleaning guide says to vacuum the pot once the grill is cold¹.
• Remove the parts your manual says to remove, then look in the pot. This maker lists the racks, grease tray and heat baffle as what comes out first².
• Vacuum the ash if the pot is full². Read using a vacuum on grill ash first.
• Look for compacted ash around the igniter¹.
• Light the grill the normal way and watch. The maker lists three things to check: pellets dropping into the pot or the auger turning, air blowing into the pot, and smoke or a hot ignition rod².

Is it always the ash?

No, and this matters. The same troubleshooting page lists other causes, and ash is only one of them.

• Fan trouble. If the fan isn't running, pellets pile up in the pot and a fire isn't established².
• Damp pellets. The maker says moist wood pellets will not burn well, and that the fire may be established but soon go out².
• A faulty igniter or auger. The page covers both, and says to look for pellets in the pot to tell whether the auger works².

So don't assume. If you've cleaned the pot and the grill still won't light, the answer may be elsewhere. Your manual's troubleshooting chart, or the maker's support team, is the next step.

Can ash cause other trouble?

One maker warns that ash packed around the ignition rod can lead to power tripping on its model, because the rod overheats¹. That's specific to one rod design, so check what your manual says about your own.

Related pages: the fire pot's role and cleaning intervals.

If a start fails, don't carry the grill indoors to try again. Carbon monoxide can kill, and a pellet grill belongs outside.