How To Fix Honeywell r7284 Hard Lockout [Solved]

After attempting 2 or 3 soft lockouts, if your unit goes into hard lockout mode, be sure that any of the following factors are responsible for it.

No ignition in the furnace, flame out of sequence, faulty oil valve, CAD cell issue, and no heat in the unit are mainly responsible for Honeywell r7284 hard lockout.

honeywell r7284 hard lockout

In this article, we have explained the detail of what is a hard lockout, what factors are responsible for it, how you can solve all these issues, and the unit’s resetting way.

Keep reading this article’s each point, and absolutely you will learn how to get your Honeywell r7284 out of the lockout mode.

What Is Hard Lockout On Oil Furnace Honeywell?

After repeatedly happening several soft lockouts, the hard lockout takes place on your oil furnace Honeywell.

In simple words, the same heat cycle’s consecutive lockout leads to a hard lockout. Before going the unit into hard lockout, you will get three chances to relight your furnace.

However, the best way to combat the hard lockout issue is to reset the unit manually.

Honeywell r7284 Hard Lockout [5 Easy Fixes]

The following are the major causes that are responsible for creating a hard lockout in your Honeywell r7284 and their solutions. Let’s start:

Note: You can also read how to fix the Honeywell r7284 won’t turn on problem.

1. No Ignition

Honeywell r7284 hard lockout no ignition is one of the most common reasons for which your oil controller faces hard lockout. Your Honeywell r7284 oil primary control’s error history will show you no ignition message for the following reasons:

  • Open manual shut-off valve
  • Lack of oil in the tank
  • Dirty or damaged CAD cell
  • Low pump pressure
  • Dirt or debris build-up in the nozzle
  • Dead spot in the burner motor or failed motor
  • Inappropriate ohm reading
  • Faulty capacitor


The primary solution to solve the furnace’s no ignition problem is Honeywell r7284 hard lockout reset. By resetting the unit, it may start to function normally again. The other solutions are:

  • Make sure the manual shut-off valve is close
  • Ensure the tank has adequate oil
  • Properly clean the CAD cell or replace the damaged cell
  • Make sure there is the proper pump pressure
  • Clean the nozzle’s dirt and debris build-up
  • Replace the failed motor and faulty capacitor
  • Ensure accurate ohm reading by the CAD cell

2. Flame Out Of Sequence

The Honeywell r7284 control system goes into lockout when there is a premature flame in the system during the purge cycle, or the flame is out of sequence.

When there is no call for flame in the unit, but the flame sensor reads the flame, this situation is called flame out of sequence. This situation is also known as Honeywell r7284 hard lockout error 1. The causes of it are:

  • Defective gas valve
  • Old unit
  • Dirty burner pot
  • Faulty pilot flame
  • Bad control board
  • Slightly plugged burner pot
  • Faulty wiring
  • Flame sensor malfunction


If the flame out of sequence is the culprit and this error remains for more than 10 seconds, you should perform Honeywell r7284 hard lockout resetAfter resetting the unit and correcting the error, the controller will start its regular operation after 1 hour. The other solutions are:

  • Inspect the gas valve, whether it’s open or closed, and replace the faulty gas valve
  • Replace the dirty, aged unit, defective pilot flame, and lousy control board if needed
  • Properly clean the burner pot and plug it into the unit perfectly
  • Tighten the loose wiring and replace the corroded or faulty one

3. Faulty Oil Valve

Another reason why your Honeywell r7284 oil primary control hard lockout occurs is a defective oil valve. A damaged oil valve hinders the controller’s smooth functioning by stopping the oil flow regulation in the system. The reasons behind this issue are:

  • Not changing the oil for a long time
  • Blockage in the oil valve
  • Dirty engine oil
  • Excessive use of oil


When the oil remains in the tank for a longer time, it creates issues in the oil valve. Replacing the defective oil valve is the prime solution. The other fixing ways are:

  • Don’t keep and use the oil in the tank or engine for a longer time. Frequently change the oil
  • Clean the oil valve’s blockage
  • Ensure the oil engine is clean and maintain a cleaning routine
  • Don’t use oil excessively, as it creates pressure on the valve.

4. CAD Cell Issue

The primary control system of the major part is the CAD cell. The main use of this cell in Honeywell r7284 oil primary control is to sense the oil burner flame’s presence.

honeywell r7284 CAD cell

If the CAD cell becomes high while running, it will fail to perceive the burner’s flame. As a result, the unit goes into lockout mode.

The CAD cell terminal’s reading is close to infinity when there is no firing in the oil burner, and it indicates high resistance. Ohm reading is the bad or good flame’s major diagnostic indicator, and the CAD cell does this Ohm reading job. Mainly, the dirty or defective CAD cell is responsible for the lockout issue.


Ensure that your CAD cell operates smoothly and senses the oil burner flame’s presence perfectly. And, properly clean the dirty CAD cell and replace the defective one.

Well, you can watch the video on oil burner training that will be helpful for you.

5. No Heat From The Furnace

When there is no heat coming from your furnace, the display shows a “No heat” message and goes into lockout mode. Your furnace is blowing, there is enough oil in the tank, but there is no heat from it. In this situation, the unit shows “Hard Lockout”. The accountable factors for it are:

  • Defective thermostat
  • Dirty oil filter or nozzle
  • Faulty pilot light
  • Gas valve malfunction


Reset the unit to get out of the lockout mode, and your unit’s display will show the “Call for Heat” message. Then you will hear the running sound of your unit’s burner motor. After that, it will ignite and start to produce heat. The general fixing ways are:

How To Reset Hard Lockout On Honeywell r7284

You can easily handle the issue of the hard lockout on the oil furnace, Honeywell, by resetting the unit. The easy resetting steps are the following:

  • Turn the furnace’s power off and plug it out from the outlet
  • Hold the “i” button and press it for 2 seconds
  • Keep the furnace in plug out situation for 30 seconds or more
  • Turn back the unit’s power

The power supply interruption for 30 seconds or more solves the lockout issue, and your Honeywell r7284 will start normal operation again. However, if the lockout mode still remains, you should contact the Honeywell customer support center.


What is an ignition lockout fault?

The ignition lockout fault is three flashes in your furnace with a 3-second pause. This fault indicates that there is a flame in the stove, but the unit fails to detect the flame. Bad ground, a faulty igniter, or sparking in the unit are responsible for it.

Where is the flame sensor in my furnace?

The furnace’s burner assembly contains the flame sensor, and it’s a fundamental part of the unit. It’s a thin metallic rod, and generally, the sensor is bent. The flame sensor sits on the pilot flame’s front in the furnace’s inside.

Where is the reset button on a Honeywell furnace?

In your Honeywell furnace, there is a blower compartment on the blower motor’s side. And in the blower compartment inside, the reset button locates. Press down the popped-up button to reset the unit.


Hopefully, after reading the above detailed and informative guide, you now know all the factors responsible for the Honeywell r7284 hard lockout. If your oil control encounters such troubles, you can now fix all the problems immediately by yourself.

But, if you struggle to solve the issue, leave a comment for us. We will help you to fix it soon.

About William

William is the founder of He has real life practical skills in fixing smoker & heating appliance issues. He loves to share his knowledge & helps others in fixing their appliances & saving their money. William firmly believes that anyone can repair his or her unit with the correct guidance & knowledge. See more at about us.

8 thoughts on “How To Fix Honeywell r7284 Hard Lockout [Solved]”

    • Hi Carlos

      The Honeywell heater shuts off for multiple reasons like a blown fuse, damaged wiring, restricted airway, failsafe malfunction, or defective components.

      First, find out the main reason behind the turning-off issue and then fix it following our solution guide on Honeywell Surround Heater Shuts Off.

      Hopefully, you get the solution.

      Wish you all the best.

    • Hi William

      As you didn’t get any solution in spite of attempting to reset your unit a few times, now check the issues no ignition in the furnace, flame out of sequence, faulty oil valve, CAD cell issue, and no heat in the unit.

      In this case, inspect all the above-mentioned issues one by one & try to fix them following our solution guide in the article.

      Hopefully, you will get the solution.

      Best of luck!

    • Hi Eugene

      One or more reasons like no ignition in the furnace, flame out of sequence, faulty oil valve, CAD cell issue, and no heat in the unit are mainly responsible for Honeywell r7284 hard lockout.

      Well, to fix the issue, first, reset your furnace & you will get the resetting process in the article.

      However, if resetting doesn’t work, check the above-mentioned issue one by one to find out the main culprit & fix it following our solution guide in the article.

      Hopefully, your problem will be solved.

      Best of luck!

  1. Can’t get oil to the furnace. I have replaced the pump the adapter to the pump & cleaned the screen. Also cleaned line into the oil tank. Is it a wiring problem and how would I fix it? I have a Honeywell R7284 oil primary control what is the reason I am not getting oil to the pump? JD

    • Hi Joe

      To fix the issue, it would be wise to contact the Honeywell customer support center or a certified technician to inspect your furnace to find out the main culprit behind the issue & fix it.

      Best of luck!


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