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The furnace is very trouble free in operation when properly maintained and quality corn is used. When the furnace fails to operate properly, troubleshooting by the operator of the furnace is limited.

Please read the following guide for answers to frequently asked questions:

  1. No fuel is being dispersed?
  2. My furnace keeps overloading the burn pot.
  3. My furnace isn’t burning and the controller is displaying LOSS of FLAME.
  4. My furnace isn’t burning and the controller is displaying LOSS of VACUUM.
  5. My furnace isn’t burning and the controller is displaying LOSS of POWER.
  6. I turned the furnace on with the On/Off switch and nothing happened.
  7. I turned the furnace on with the On/Off switch and the board lights up and the fans come on, but the pot doesn’t go into self-clean.
  8. Why is my glass dirty?
  9. How do I adjust my pilot feed rate settings (#1 setting)?
  10. How do I adjust the draft for the Pilot settings (#1 setting)?
  11. My furnace isn't burning and the controller is displaying AUGER TIME-OUT.
  12. My furnace isn't running and the controller is displaying ACTUATOR LIMIT ERROR.


1. No fuel is being dispersed?

Solution: Insure the auger tube is primed. If it is, check for jams or that the lid is closed (the micro switch on the hopper will not let the auger run if open). If not, press manual feed to prime the auger.

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2. My furnace keeps overloading the burn pot.

Solution: If burning corn, check the moisture content of your corn. It should be 16% or less. Also make sure you are using clean corn. Otherwise this is mainly caused by improper combustion (See Damper Adjustment section of the Operations Manual). Besides the damper adjustment, there are several areas that can have an effect on the combustion process. Check all gaskets, doors and door latching systems for air leaks. Any leaks in these areas will negatively affect the burn process and cause the pot to overload.

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3. My furnace isn’t burning and the controller is displaying LOSS of FLAME.
This message indicates the Proof of Fire switch no longer senses a flame in the firebox area of the furnace. What caused the furnace to go out?
a. Fuel stopped feeding.
b. Fire went out due to fuel overloading the fire pot.
c. Unit ran out of fuel.

Solution: Check hopper for fuel. Press the Prime button to ensure fuel is being dispersed. Check fire pot to ensure proper installation and re-light the furnace.

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4. My furnace isn’t burning and the controller is displaying LOSS of VACUUM.
This message indicates that the Sail switch no longer senses a vacuum in the furnace.
a. The door of the unit was left open longer than 90 seconds.
b. The ash pan door was left open longer than 90 seconds.
c. Switch is defective.
d. Intake air or exhaust path obstructed.
e. Seals need replacing.

Solution: Check inner door gasket and ash pan gasket to insure good seal. Check combustion air path for obstruction. Check to see if combustion blower is still operating by attempting to restart.

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5. My furnace isn’t burning and the controller is displaying LOSS of POWER.
This means the power was interrupted at some point and the unit shutdown.

Solution: Restart furnace if power has been restored.

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6. I turned the furnace on with the On/Off switch and nothing happened.

Solution: First check to see if the Furnace is plugged in and the receptacle has power to it. Check the fuses on the back of the control board. Replace with a 10 A fuse.

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7. I turned the furnace on with the On/Off switch and the board lights up and the fans come on, but the pot doesn’t go into self-clean.

Solution: Unit may be waiting for the sail switch therefore check for proper seals and that the fire door and ash pan are securely closed. Actuators will not move unless vacuum is detected.

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8. Why is my glass dirty?
Normal operation of your Fahrenheit Technologies Inc. Furnace will produce a light build-up on the glass that wipes off with a dry paper towel. However extended burning on the low setting only will produce a light tan color. These types of build-ups on the glass are normal. A heavy black build-up on the glass could indicate a problem.

Solution: Adjust the combustion air setting to the proper setting. If this doesn’t seem to help, make sure the clean out cover plates are installed in the furnace. It also could be an indication that the furnace is getting plugged and needs a good cleaning. Refer to the section in the manual that covers the daily, periodic and yearly maintenance of the furnace.

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9. How do I adjust my pilot feed rate settings (#1 setting)?
Not all fuel burns at the same rate. The moisture content of corn greatly influences how it burns. Following is a description of the function of the feed trim button.

Solution: The auger trim mode on the control board allows the feed rate on #1 (Pilot setting) to be increased or decreased. Default is level #3. 1 is the lowest feed-rate and 5 is the fastest. Different types of fuel and the way the furnace is installed will affect the low burn and needs attention during the break-in period of the furnace.

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10. How do I adjust the draft for the Pilot settings (#1 setting)?

Solution: Following is a description of the function of the Fan Trim button. The draft trim mode on the control board allows the draft fan speed to be increased or decreased. Default is level #3. 1 is the slowest and 5 is the fastest.  This may be used in a venting situation that is restrictive, a long horizontal run or a venting system with excessive elbows for instance. Before calling your dealer for assistance, please read your Installations and Operations Manual and perform all the maintenance issues covered in the Daily and Periodic Maintenance section of the manual. If the furnace still does not operate correctly, call your dealer for assistance.

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11. My furnace isn't burning and the controller is displaying AUGER TIME-OUT.
The unit sensed the auger had not running for more than 2 consecutive minutes.  This can be caused by leaving the hopper lid open or the unit sensing and over temperature and the fan high limit switch tripping.

Solution: Verify the Lid is closed and the switch is operating properly. Remove fan limit switch cover and ensure the dial is not above 200 degrees.

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12. My furnace isn't running and the controller is displaying ACTUATOR LIMIT ERROR.
The unit sensed that the actuator did not reach the extended or retracted position in the allotted time or a wire is broken or disconnected from a actuator.

Solution: Once the unit has cooled down verify the pot is installed properly and the remove any obstructions.  Go to the maintenance mode and operate both actuators forward and back to ensure they move freely. Check for any loose, broken or disconnected wires to the actuators.

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