Harman 5 Blinks: Why Your Stove Didn't Light (and Fixes)

By Walt Hensley · Published September 30, 2026

On a Harman with an automatic igniter, five blinks on the status light means the stove failed to light within its 36-minute start cycle. That’s the P43 owner’s manual definition, and the code only exists with the igniter switch in AUTO. Before you buy parts, look in the burn pot: empty means the pellets never arrived; full of unlit pellets points to the igniter side. Reset: Mode Selector to OFF, then back to your mode.

The code doesn’t name a part. It tells you the fire never showed up, so work out why before you spend anything. Counted a different number? Start with the full Harman blink code table.

What does 5 blinks mean on a Harman?

The Harman P43 owner’s manual (rev. 3-90-04301R18, 03/13): “5 Blinks (In Igniter Auto. Mode Only): Indicates that the unit has failed to light within the 36 minute start cycle.” Reset: Mode Selector to OFF, then to either mode again. Harman’s P-Series owner’s manual for the -C boards (8390-044C, R26) prints the same definition, word for word.

• AUTO only. The stove tried to light itself (igniter switch on AUTO) and couldn’t.
• 36 minutes, not 32. Some parts-seller pages say 32; the manual says 36. It prints no exhaust temperature for “lit.” (Its general description, in the 6-blink troubleshooting, is that the control tracks combustion through feed settings and ESP, or exhaust probe, temperatures.)
• Not just a morning code. In Room Temperature Mode on AUTO, the P43 shuts itself off when no heat is needed and relights when the room cools. Every relight is a start, so if one fails, five blinks can appear mid-afternoon.

Its neighbors: 6 blinks means the fire lit but burned poorly too long (see the 6-blink deep dive); 3 blinks is the ESP probe code.

Which Harman do you have?

Check your board before you act.

• Classic P43 (manual R18, 03/13): 5 blinks = failed to light within the 36-minute start cycle, igniter in AUTO only.
• Classic P61, manual-ignition (manual R10): lists 1, 3, 4 and 6 blinks, no 5. It’s lit by hand with gel; there’s no automatic start to fail.
• -C generation (P43-C, P61-C, P68-C): same 5-blink per its owner’s manual (8390-044C, R26): 36 minutes, Auto mode only, same reset. The rest of its table differs from the classic one (2 blinks, a 6-blink window of more than 25 minutes, no 1-blink), and so does its manual lighting (below).
• XXV, classic P68, Accentra, other revisions: not verified against a manual I can cite. Check your owner’s manual, or call a dealer with your serial number.

Look in the burn pot first: empty or full?

Look through the glass before you open anything. What’s in the pot tells you which half of the system failed.

Empty burn pot: the pellets never arrived

• The hopper ran dry. After a refill the auger tube is still empty. The P43 procedure for a start “after an empty hopper” is one 60-second TEST cycle on the Feed Adjuster to fill it. Not two: turning to TEST “again and again may purge too much fuel into the burn pot causing excessive smoke on start-up.”
• Bridging and fines. Fines “do not flow easily and often build up on the hopper funnel bottom angles,” says the manual; push them into the feeder opening or clean them out. In forum threads about this code, owners commonly describe exactly this: empty pot, pellets in the hopper, bridging or fines the prime suspect. Sometimes, they report, the OFF-and-back reset alone got the stove going. Feed keeps stalling? See the auger-not-feeding guide.
• A door, the ash pan or the hopper lid isn’t closed. On the P43, the low-pressure switch won’t let the auger or the igniter run with the view door or ash pan door open, and the low draft sensor and hopper lid switch also cut power to both. The manual’s causes of poor draft: blocked exhaust, dirty combustion blower blades, a failed blower, or an opening that isn’t sealed.

The manual doesn’t say an open switch sets a 5-blink, but the logic is short: no feed and no igniter means no fire in 36 minutes, which is what this code reports. A good igniter can look dead. Close and latch everything, then reset.

Pellets in the pot, but they never lit

The feed worked, so look at the lighting side. Stove completely cold, then unplugged; the P43’s burn pot section warns, “Disconnect the power to the unit before removing cover.”

1. Scrape the pot’s holed top surface and sides.
2. Open the clean-out chamber under the pot and clean out the ash.
3. Tap the pot’s top front edge with the scraper. It knocks ash down through the holes and “helps knock scale off of the igniter element.”
4. If the igniter has been out, its lead connections belong at the rear of the feeder body, “not coiled inside the burn pot.”
5. Check the fuel. Pellets over 1-1/2 inches “can cause inconsistent feeding and/or ignition”; damp pellets “may not burn properly.”

Many owners report that ash packed around the igniter causes more failed lights than a dead igniter. Only then test the igniter itself, cold and unplugged: see the igniter replacement guide.

Before you reset: what about the pellets in the pot?

The P43 manual doesn’t tell you to empty the pot after a failed start. It asks for no unburned fuel in the ash pan before lighting (it “will cause smoke and soot”) and a burn pot cleaned “if necessary.” Its line that a small amount of new fuel in the bottom “is not a problem” comes from the weekly burn-pot scraping routine; it isn’t permission to relight on top of a full load that failed to catch. What it warns against is too much fuel, as with repeated TEST cycles.

Owners take that one step further: after a failed light, the common practice is to let the stove go cold, scoop the unburned pellets out, and restart from a normal load instead of a heap. Englander, a different brand, makes a version of it mandatory: remove all ashes, burnt or partially burnt, from the burn pot area every time before pressing ON. On a Harman it’s good practice, not a factory step. Either way, look in the pot before any restart and follow your model’s start procedure; don’t relight on top of a heap of unlit pellets. The brand-by-brand version, with the safe order for clearing it, is in burn pot overflowing.

Vacuuming? The stove must be completely out: per the P43 manual, live pellets sucked into a vacuum will set it on fire and “may ultimately cause a house fire.”

How do you reset a Harman 5-blink code?

Mode Selector to OFF, then back to your mode. Unplugging for a few seconds is the manual’s reset for 3 blinks, not this code, and a habit worth breaking: the P43 manual says never pull the plug to shut the stove down, because the combustion blower stops and smoke escapes through the window and door gaskets. The -C manual warns the same: all motors stop, which may cause incomplete combustion and smoke in the firebox. Reset once, after fixing the cause.

Dead igniter on a cold night? The manual’s own backup

Many 5-blink pages skip this: the P43 can run without its igniter. The MANUAL position “lets you light the stove manually, should the igniter fail for any reason,” and the manual describes manual operation for emergencies, “i.e. igniter failure.” Its manual start-up:

1. Igniter switch to MANUAL (down). No unburned fuel in the ash pan.
2. Feed Adjuster to your usual rate (No. 4 “is good for most pellets”).
3. Mode Selector to OFF, then to your mode; this resets the control and starts the combustion motor. Set the temperature dial.
4. Clean the burn pot with the scraper if necessary.
5. Fill it with pellets only level with its front edge (“Do Not Over Fill”).
6. Stir starting gel into the pellets, light it with a match, close the door. Operation begins when the fire reaches the proper temperature.

Warning, straight from the manual: never use gasoline, gasoline-type lantern fuel, kerosene, charcoal lighter fluid or similar liquids to start or “freshen up” a fire in this heater. Gel or a wax-type fire starter only.

In MANUAL, Room Temperature Mode no longer shuts the stove off when the room is warm; it drops to its lowest setting and stays there. If the feed never starts after a manual light, the P43’s troubleshooting table suggests too little fuel or gel: the feed motor waits until the exhaust probe senses a certain temperature.

The -C models do it differently. Their owner’s manual (8390-044C, R26) has its own “Emergency Manual Ignition,” and it’s stricter:

• Cold starts only: “Never attempt to manually light a stove or insert that has been operated recently and is not at room temperature.” After a failed automatic start, give it at least 30 minutes to cool to room temperature.
• Igniter switch on “Igniter – Disabled” (the -C switch reads AUTO or DISABLED), Mode Selector to OFF.
• Burn pot filled only half way (“Do Not Over Fill”), not to the front edge as on the P43. A pot still heaped from the failed start is not where you begin.
• Only firestarter “commercially marketed for pellet stoves”: wax-coated wood chips, pellet starter gel or pellet igniter blocks. Light it with a match, close the door, turn the Mode Selector to Constant Burn.

Only use the procedure your own manual describes, and don’t mix steps between generations. The classic P61 is always lit by hand, with its own procedure. Manual lighting keeps you warm while the part ships. It isn’t the repair: the -C manual says the igniter “should be repaired or replaced as soon as practical.”

When should you call a technician?

• Five blinks keep coming back with a clean pot, pellets arriving, everything latched and an igniter that tests good.
• Anything behind the control panel. The panel drawing in the P43 manual carries the label “(WARNING) HIGH VOLTAGE — Disconnect power before opening cover.” Board, wiring and switch testing are dealer work. Never jumper a door, lid or draft switch to force a start; the manual lists them under “Safety Features.”
• A draft problem cleaning doesn’t clear, like a combustion blower that sounds wrong or won’t run.

Have your model and serial number ready; with codes that change by board, it does half the diagnosis.

FAQ

What’s the difference between 5 and 6 blinks on a Harman? Five: no fire within the 36-minute start cycle. Six: the fire lit, but the board calculated poor or incomplete combustion for more than 50 minutes (classic P43 and P61 manuals) or more than 25 minutes (-C manual); on the P43 and the -C, it may also be set if the stove runs out of pellets.

Can a Harman P61 show 5 blinks? Not the classic manual-ignition P61: its manual lists 1, 3, 4 and 6 blinks. The P61-C can: its owner’s manual lists 5 blinks, in Igniter Auto mode only.

Does 5 blinks always mean a bad igniter? No. An empty pot points to the feed side. Only unlit pellets in a clean pot point toward the igniter, and even then, test before you buy.

How long should a Harman take to light? The P43 manual gives only the limit: 36 minutes. Owners commonly report fire within the first few minutes, 3 to 5 being the figure you’ll hear most; that’s owner experience, not a Harman spec.

Can I light my Harman manually? On a P43 with the AUTO/MANUAL igniter switch, yes, as above. On the -C models, only by their manual’s emergency procedure: cold stove, igniter on Disabled, burn pot half full. On other models, follow your own manual, and never use liquid fuels.

Walt Hensley — Walt Hensley is the pen name of Pellet Owner’s editor. I’m not an NFI-certified technician, and I don’t sell stoves, pellets, or parts. Every guide here starts from the manufacturers’ owner’s and service manuals, is cross-checked against what owners consistently report, and says which is which — including what you can safely check yourself and when it’s time to call a certified technician.