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Sharp AL-1631 I have a Sharp AL-1631 copier. The copier is flashing H-4. What does this mean and what can I do to fix the problem? Thanks.

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  • jbcopyguy Feb 22, 2008

    Yes, I have the same problem. Called Sharp they said it's the fuser unit. Purchased a New Fuser Unit, replaced it and still have the H4 flashing code. Do you still need to do the reset even if you replace the whole fuser unit? Thanks for your help.


  • Anonymous Apr 01, 2008

    the machine send me the sign H-4, i introducting the code and not has the solution...That I should do???

  • Anonymous Apr 01, 2008

    the machine send me the sign H-4, i introducting the code and not has the solution...That I should do???1631 sharp.

  • george_ fair Sep 29, 2008

    My AR M205 is also showing h4 intermittently. I have treid pushing the button C and CA but don't have an auto button apart from 'Auto image'. I have tried pressing it but to no avail. I would like to know what order of buttons I press to reset this because it was working fine until a pwer cut the other day. Any help really appreciated. George.



2 Answers

Try this. Press C (cancel), Press Auto, Press C, press Auto
Enter 14 (code) e Press Print (green)
It´s a code to cancel H4, if it´s don´t work, send me e-mail to

Posted on Feb 15, 2008

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  • 71 Answers

Fuser is not heating up. Normally a broken bulb.

Unless you can get hold of spares, call the engineer.

Posted on Feb 14, 2008


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SOURCE: have a Sharp AL-1631 copier.

Push the 'clear' button and then the 'auto' button then the 'clear' button and then the 'auto' button again.This should be done as quickly as you can and the console will go blank.Next,select 14,which is the low temp clearing code, and then push 'start' and then turn the machine off and back on again.

If the error still occurs call Sharp or qualified technician to resolve your fuser issue

Posted on Aug 05, 2011

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1 Answer

AL-1631 is flashing "H". How do I fix this which appears to be heat related.

the h means that your fuser needs to be replaced. it might be fixable by changing the thermal fuse but most of the time the whole fuser needs to be replaced

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Which light is flashing? One that looks like a small battery or the one that looks like a stack of 6 "dots"?

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Our Sparp AL-1631 is flashing 4 then H what does it need?

To reset the H4 condition on your Sharp AL 1631 copier press the following key's in sequence and as quickly as possible (with 4 seconds for the first 4 keys)
Press "C" then the far left key (exposure mode) then the "C" key then the far left again.
So in other words C, far left, C, far left
If done correctly the display should go blank.
Now key in 14 as if you were going to make 14 copies.
Now press the print button.
The machine should reset and the code should be gone.
9 times out of 10 this is a false code that pops up due to power surges or noise.
If the code comes back this means you have a heater lamp or thermal fuse (more common) failure in the fusing area and will need service.

Thank You for using Fixya. Our solutions are being rated this month based on positive testimonials so please leave a testimonial for me if this solution works for you.

Oct 05, 2010 | Sharp AL 1631 Copier

1 Answer

My copier is flashing the code H4

I have a tip posted here on Fixya that resolves this problem easily.
Here is the link:

If it works for you then please return here and provide feedback for me that I was helpful.

Jul 25, 2010 | Sharp AL 1631 Copier

1 Answer

My sharp al-1631 will not run when plugged in. the light comes on by the window where the number of copies just flashes H and then 4. is this an easy fix

It looks like you have a bad component in the fuser. It could be a bad thermofuse or thermistor. At this point it would be best to take it in to be serviced by a Sharp dealer as they should be able to repair it fairly quickly.

Apr 19, 2010 | Sharp AL 1631 Copier

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Copier flashing "H4" code

Hello sir;Follow these steps within 4 seconds; press 'clear', "exposure" ,"clear" "exposure" then enter 14 hit print, should be OK.

Jan 30, 2010 | Sharp AL 1631 Copier

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This might refer to your scanner assy being locked. The scanner assy is the unit under the glass that scans your document prior to copying it. Look inside the cavity where you pick up your completed copies. Look at the upper left corner and see if there is a knob there. If there is, make sure it is in the completely unlocked position.


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It probably the toner cartrisge is empty or if there's an error code H4, the heater lamp is spoiled

Apr 02, 2009 | Sharp AL 1631 Copier

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Flashing light

Change the toner

Jun 23, 2008 | Sharp AL 1631 Copier

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