A pellet stove that won’t ignite is frustrating, but it’s rarely a mystery — the causes are well understood and mostly traceable to a handful of systems: airflow, the igniter, the burn pot, or the pellet feed. This guide walks through diagnosis in a logical order, from the simplest checks to the more involved ones, so you’re not guessing or replacing parts unnecessarily.
Start With the Basics
Before assuming a mechanical problem, rule out the simple stuff:
- Is the stove actually getting power? Check that it’s plugged in and that the circuit breaker hasn’t tripped.
- Are there enough pellets in the hopper, and are they dry? Damp, clumped, or low-quality pellets can disrupt ignition even when everything else is working correctly.
- Is the hopper lid fully closed? Many stoves have a hopper lid safety switch that prevents startup if it’s not securely shut.
- Is the door properly latched? Similarly, most stoves won’t complete their startup sequence with the door ajar.
If all of that checks out and the stove still won’t start, work through the diagnostic path below.
The Key Diagnostic Question: Is It Feeding Pellets or Not?
This single observation narrows down the likely cause significantly:
If the Stove Is Feeding Pellets But Not Igniting
This points toward the igniter or airflow, not the feed system. Open the door and carefully feel near the burn pot area (once you’re sure it’s safe to do so) to check whether the igniter is producing heat at all.
If the Stove Isn’t Feeding Pellets at All
This points toward the auger, feed motor, or a safety switch (like the hopper lid switch) rather than the ignition components — see the feed-related causes below.
Common Causes and Fixes
1. Dirty or Clogged Burn Pot
This is the single most common cause of ignition trouble, and the easiest to fix. Ash or debris blocking the burn pot’s air holes — or covering the igniter itself — prevents proper airflow and can smother ignition before it really starts. Fix: Thoroughly clean and vacuum the burn pot, making sure all air holes are clear (see our cleaning guide for the full process). This alone resolves a large share of ignition complaints.
2. Failing or Poorly Positioned Igniter
The igniter needs to reach a proper red-hot temperature and be correctly seated to transfer enough heat to start combustion. Common issues:
- Ash or debris clogging the igniter’s fins, preventing it from heating properly — clean the area and gently tap the assembly to dislodge buildup.
- Incorrect positioning, especially if the igniter was recently replaced — too far from the pellets, or not seated properly in its housing, and it won’t transfer enough heat.
- A genuinely failed igniter. You can test this with a multimeter: disconnect the igniter’s two wires from the control board, set the multimeter to ohms, and touch a probe to each wire end. A functional igniter typically reads somewhere in the 40–100 ohm range (check your manual for the exact figure). No reading, or “OL” (open loop), means the internal filament has broken and the igniter needs replacing.
3. Airflow Blockage
Combustion needs adequate oxygen flow, and a blockage anywhere in the air intake or exhaust path can prevent ignition even with a working igniter and clean burn pot. Check:
- The air intake vent for obstructions.
- The exhaust venting system, including buildup that restricts airflow (see our flue requirements guide for why this matters).
- The exhaust blower, confirming it’s spinning freely and not making unusual noise.
4. Auger or Feed System Problems
If pellets aren’t reaching the burn pot at all:
- Check the auger and feed tube for blockages from stuck pellets, debris, or accumulated pellet dust (“fines”).
- Listen to the feed motor. A motor that hums but doesn’t turn the auger suggests a jam or motor failure rather than a control issue.
- Check the hopper lid switch and door switch, which are wired in-line with the feed circuit on many stoves — if either isn’t registering as closed, the stove may withhold feeding as a safety measure even though everything else is fine.
5. Poor-Quality or Damp Pellets
Low-quality, damp, or crumbly pellets can fail to ignite properly regardless of how well the rest of the system is functioning, and they tend to produce excess ash that compounds burn pot clogging. See our upcoming guide on pellet quality for how to evaluate what you’re burning — in the meantime, switching to a fresh bag of dry, reputable pellets is a quick and easy troubleshooting step worth ruling out early.
6. Electrical or Control Board Issues
If the display shows error codes, is unresponsive, or the stove behaves erratically beyond a simple ignition failure, the control board itself may be at fault. This is generally not a DIY repair — see the professional-help section below.
Try a Reset Before Deeper Troubleshooting
Many ignition issues resolve with a simple reset: unplug the stove for a few minutes, then plug it back in and restart the normal startup sequence. Some models also support a soft reset through the control panel — check your manual for the specific button combination (commonly a MODE/RESET button, or holding the up/down arrows together).
When to Call a Professional
- The igniter tests as failed and you’re not comfortable replacing it yourself.
- You suspect a control board issue (error codes, unresponsive display, erratic behavior).
- The auger motor hums but won’t turn, suggesting a jam or motor failure beyond simple debris removal.
- You’ve worked through the list above and the stove still won’t ignite reliably.
See our installer guide for finding an NFI-certified technician — the same certification standard that matters for installation applies to diagnostic and repair work.
Frequently Asked Questions
What’s the very first thing I should check if my pellet stove won’t start? Confirm it has power (plugged in, breaker not tripped), has enough dry pellets, and that the hopper lid and door are both fully closed — these simple checks resolve a surprising number of “won’t start” situations before you need to look at any components.
Can I test my igniter myself without professional help? Yes — a basic multimeter test (checking for resistance in the 40–100 ohm range, or your manual’s specified figure) is a straightforward DIY diagnostic that tells you whether the igniter itself has failed.
Is it normal for a pellet stove to occasionally fail to start on the first attempt? Occasional single-attempt failures can happen, but a stove that consistently struggles to ignite has an underlying cause worth diagnosing — usually burn pot cleanliness, igniter condition, or airflow, in roughly that order of likelihood.
Does regular maintenance actually prevent ignition problems? Yes, significantly — most of the causes above (dirty burn pot, ash-clogged igniter, airflow restriction, pellet dust in the feed system) are exactly what routine cleaning and the annual maintenance checklist are designed to prevent.
Continue reading: Why Does My Pellet Stove Keep Shutting Off? Causes and Solutions