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Harman Pellet Stove Control Panel Explained

Updated: 4 days ago

If you need information about an older Harman pellet stove without touch controls, we can help. We will show you the different functions and explain what each setting does. We will also go over the meanings of the blinking status codes and provide some helpful tips.

Table of Contents

Control Board Questions

When Did Harman Stop Using Knob Controls?

Harman stopped using the control knobs and switched over to their newer and current style touch controls around 2014.

What Is Different?

The newer touch controls have features such as scheduling, diagnostics, and more in-depth information. While these are great features for some, for others, they just mean more complicated screens and menus.

How Are Older Controls Better?

The older model controls have an easier design, offering only a few knobs and easy-to-understand temperature controls. These are perfect for people looking for simpler designs and ease of use.

Harman Stove Controls Explained

Here we will go over in-depth each control knob and what the different numbers mean, as well as any switches or lights.

Mode Selector

Allows you to choose between Room Temp Mode, Constant Burn Mode, or OFF. Also allows you to vary the distribution blower speed by turning the knob to the high (H) or low (L) side of each mode.

Constant Burn/Stove Temp

When set to constant burn mode, it will keep running until you turn the knob off, or it will run out of pellets. In this mode, the stove will work the same regardless of the temperature in the room. You can adjust the heat level using the scale from 1 to 7, where higher numbers mean more heat output.

Room Temp

In the room temperature mode, the stove operates based on the temperature you set, which can range from 50 to 90 degrees. In this mode, the stove will adjust the flame level and the speed of the blower based on the room temperature.

Temperature Dial


On constant burn mode, use the numbers ranging from 1 to 7. The lowest heat setting is 1, and the highest is 7. We recommend not burning on settings lower than 2 1/2 as this makes for a dirtier burn.


Here is your temperature setting. When used in the Room temperature mode mentioned above, it ranges from 50 to 90 degrees. The temperature is red through the black probe that came with the unit this should be above the ground.

Igniter Switch

This toggle switch will allow you to ignite the stove manually or automatically.


This mode is for manually lighting your stove. It allows you to light the stove without it continuing to feed. The stove will not feed till the exhaust temperature probe reads that there is a fire in the stove.


Auto will tell the stove to fill the burn pot and then wait for the igniter to light the pellets. A normal start-up takes 5 to 12 minutes.

Feed Adjuster

in short, this adjusts the maximum amount the unit can feed regardless of the setting.

Feed limit (1-6)

The Feed Limit control is factory set at #4 and works well with most fuels. However, if the flame is too high or low, you'll need to adjust the feed rate. Wait 15 minutes after the appliance starts burning before making any changes. Then, wait another 15 minutes for the Feed Limit to take effect.


This runs all the motors at full speed for one minute to check if they are working properly. After a minute, the controller initiates a small burn, and the combustion blower remains on low.



  • This light should be solid. If blinking, see the error codes listed below.


  • This should be solid red. If not, there is no power to the control board, change the fuse while unplugged. If it repeats, call a service provider.

Distribution Blower

  • This light indicates the blower has power and should be on.

Combustion Blower

  • This light should be solid and indicate the exhaust motor is on.

Feed Motor

  • This will come on and off. This indicates the feed motor is on.


  • The light will be solid, meaning the igniter is on. Once heated, it will go out.

Error Codes

We will go over the different error codes and their meanings, along with the simplest solutions. If these don't work, it's best to call a service professional.

Blink Status


  • This is normal operation and is working as it should.

Two Blinks

  • This indicates that there is an airflow problem. Start with cleaning the stove and piping.

Three Blinks

  • Exhaust temp signal loss This means there is no signal coming from the temp probe on the exhaust check connections or change probe.

Four Blinks

  • Room temp signal loss is not reading the room temp (only for room temp mode). Check connections or get a new probe.

Five Blinks

  • Failure to light within 36 minutes. Start by cleaning out the trap door and scraping the burn pot. Change the igniter if the igniter switch is in auto and the pot is cold.

Six Blinks

  • Poor combustion over a 25-minute run time. Start with a good cleaning, including the piping.

Harman Service In Rhode Island

Northeast Pellet Stoves

We can assist you if you need further help with your Harman pellet stove. We specialize in all Harman stoves and have original stoves from the 90s that are still burning strong today. Don't waste money on a new stove when we can get yours like new for half the cost.

Call (401) 597-2249

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