Harman Absolute 43 Head Scratcher

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.

Rogue

Member
Oct 25, 2017
7
Northern Ontario
Ran this stove flawlessly for 2 seasons in a bitter cold climate (lots of -30F's)
Our only source of heat in all small 700 sq ft house.

I mostly run the stove in manual peak winter, but use auto in fall and spring.

Last spring the stove started failing auto fire once in awhile, until it quit altogether so we continued with manual which worked great.
I pulled the igniter out this summer, and was surprised to see the insulation of the igniter wires mostly non existent. Basically bare wired.
The fuse had not blown, and upon inspection of the control board saw no (noticable) damage.

Bought a new igniter from an american manufacturer...15 fin. 310w made with 800 high grade stainless steel. Installed with no problems.

Turned the stove on this fall, and it did light automatically, but seemed to take longer than normal, perhaps 8 minutes or so.
Worked fine for a few days, then failed to auto start.

1 month later and I'm still fighting with the stove, it fails 99% of the time so I'm back to using manual when needed.

- Did an ohm test on new ignitor, read right around 50 ( tested my old ignitor and it actually read 48)
- Put a voltage tester on ignitor wiring from behind the stove, and it was 119v - 123v over 10 minutes of trying to auto start.
- Had already done complete cleaning...chimney sweep and clean out from both ends, pulled stove out and cleaned both chimney and rear exhaust of stove.
- Pulled exhaust probe and cleaned, reading on probe diagnostics when trying to auto start seem fine. Temp starts at right around room temp, and slowly rises as ignitor heats up.
- pulled ignitor and tested out of stove, using the stoves wiring and it glows red at about the 1:45 mark.
- burn pot was disassembled, cleaned above and below, all holes open, metal deflector is installed properly over ignitor
- Trap door under igniter is closed and screwed tight during start-up
- burn plate had warped after the first season, but still ignited, but pulled and straightened this fall.
- intake flapper was stuck in an open position, and now fixed and working.
- exhaust fan checked and cleaned and running between 2800 and 3008 rpm at start-up.
- checked all gaskets, hopper gasket seems fine, but I did find though if I held a lighter around stove door with exhaust fan on, that the flame gets sucked into areas of the hinge side.
- Removed old gasket, and cleaned very well, installed new gasket ...did not stretch it, let it cure for 12 hours with same results...seems to be a small leak on hinge side.
- Tried to adjust door on the handle side, and with every small adjustment, could not lose the leak.
- checked for cracks, holes, defects in casting around hinge side, cant find any problems.
-Tried different pellets, as well as some pine shaving in the burn pot..still failed. It seems to me the stove is over-feeding upon start-up, and this unit has no dip switches to control that, so I tested different pellets, and pine shaving in burn pot, with hopper lid open so pellets wouldn't bury or push out my test samples, with no luck, would get hot, but no ignition. Tried again by emptying hopper, so I could test with hopper door closed, same results.

SO...I know door is leaking, not sure if its my only problem. Stove definitly will begin to over feed after first ignition failure. Tried using duct tape in various positions where the gasket meets the stove and just using exhaust fan to see if I could stop the leak, or pinpoint it, but could not get leak to stop.

Anyone have any ideas what I may be overlooking? Stove started last night 3 times on auto, and failed again this morning.
The small leak bothers me, but I dont think it explains the over feeding. I also neglected using a surge protector on this stove and we have had many power outages and or brown outs, which did take out my Flat screen tv. I'm wondering if my control board is partly responsible with the bad igniter wires, and the possible brown outs while plugged in.

Any advice is very welcome !
 
Welcome to the forum. You've certainly done some thorough investigating. One of my mantras as a tech professional is stick with the obvious first. I'd try another igniter. Just because it's new doesn't mean it's right. I know it might seem like a ripoff to buy, yet, another igniter but that's my hunch. And I'd buy a genuine Harman version just to play it safe.
 
Did you check your venting? Is it possible that it is partly obstructed?

Sounds to me like your not getting the airflow across you igniter to light your pellets. Are any of your holes in the burnpot closed up after you straightened it out?
 
  • Like
Reactions: jackman
Also you said the door is leaking, fix the door leak. Pobably needs a new gasket.
 
Ive actually changed the gasket twice in 1 week, the first time I used the gasket manufactures instructions and applied the gasket, installed the door, and closed it and let it cure for 12 hours...after reading a post on this forum, they suggested it may be a bad idea to compress the gasket by closing the door during cure time, so I tried letting it cure before re-installing. Thanks
 
Anyone have any ideas what I may be overlooking? Stove started last night 3 times on auto, and failed again this morning.
The small leak bothers me, but I dont think it explains the over feeding. I also neglected using a surge protector on this stove and we have had many power outages and or brown outs, which did take out my Flat screen tv. I'm wondering if my control board is partly responsible with the bad igniter wires, and the possible brown outs while plugged in.

Any advice is very welcome !

Have you checked the draft with a meter?
Follow the instructions on page 22
http://downloads.hearthnhome.com/installManuals/Absolute43_I.pdf
 
Last edited:
I have an Absolute63. The feed rate is adjustable... have you turning the feed rate way back? (By your thorough investigative diagnostics... I am assuming you've tried this).

The control panel also allows for testing functions... I'll have to go check mine, but I am pretty sure you can engage the various ignition functions independently. Let me know if I can test anything for you on mine for verification.

Mal
 
I have an Absolute63. The feed rate is adjustable... have you turning the feed rate way back? (By your thorough investigative diagnostics... I am assuming you've tried this).

The control panel also allows for testing functions... I'll have to go check mine, but I am pretty sure you can engage the various ignition functions independently. Let me know if I can test anything for you on mine for verification.

Mal
Thanks Mal Have definitely set the feed rate back, but am pretty sure it really only affects stove at operating temp, and not cold start. After installing the 2nd gasket and watching how the gasket is "browning" only at the bottom, Im suspecting maybe my door is warped, and there doesnt appear to be any available adjustment on the hinge side. For now Ive ordered another igniter ....at the least I'll have an extra.
 
I had an intermittent issue with ignition and a VERY dirty burn on a new Absolute 43 a few years ago. The dealer tried everything they could think of, did every test Harman asked for and made every adjustment made that Harman suggested. At the end of the day Harman took back the Absolute and offered me my choice of another Absolute or anything else I wanted. I went with an Accentra, it operates flawlessly! I do really miss the advanced operating panel with the built in set back. I wish they could have fixed it.
 
fmsm put in a set back thermostat and you will have the same thing as the Absolute. They are economical (under 50 bucks). I've been running my p43 on one I got at Menards for 20.00 and it has worked flawlessly for 4 years.
Ron
 
3AA684F2-B22B-415D-948E-E7E885B4A05A.png
fmsm put in a set back thermostat and you will have the same thing as the Absolute. They are economical (under 50 bucks). I've been running my p43 on one I got at Menards for 20.00 and it has worked flawlessly for 4 years.
Ron
Set backs will trigger an error code and according to Harman engineers they are not the proper way to set back. Here is the proper way above.

There are other features as well that I prefer in the new control panel.
 
My stove has been running properly with a set back thermostat for 4 years with out it ever throwing any code other than the one it throws when the stat is not calling for heat. This is the normal 4 blink error code that will automatically reset when the stove calls for heat. As long as the stat has gold contacts and millivolt compatible it will work fine. Look it up in the sticky thread about Harmans. No need to over complicate things.
 
I suspect the possibility of a crack,so that airflow is not going up through the ignitor properly,but going down.You could use something smoking-match blown out,etc,and see if any smoke is being drawn down into the ignitor(comb. motor running).In my opinion,a slight leak in a Harman door gasket is nothing,as they have a powerful flue system.Cheaper stoves,it can be a problem.If people grabbed a lighter,and went around their door seal(pellet or wood stove),they would be amazed.My 06 accentra has the original gasket,it will "draw the flame" right by one of the hinges,has been that way for the three years I have been burning it.
 
My stove has been running properly with a set back thermostat for 4 years with out it ever throwing any code other than the one it throws when the stat is not calling for heat. This is the normal 4 blink error code that will automatically reset when the stove calls for heat. As long as the stat has gold contacts and millivolt compatible it will work fine. Look it up in the sticky thread about Harmans. No need to over complicate things.
Again, according to the Harman engineers you may develop an issue with your control board. Why risk it for a very simple mod?

Then again, your stove, your risk.
 
Again, according to the Harman engineers you may develop an issue with your control board. Why risk it for a very simple mod?

Then again, your stove, your risk.
You do know there was a Harman service bulletin saying it is perfectly acceptable to do this?Even came with a wiring diagram.
 
You do know there was a Harman service bulletin saying it is perfectly acceptable to do this?Even came with a wiring diagram.
And it specified a particular Honeywell model that I couldn’t find, that prompted a call to Harman and the subsequent conversation with one of their engineers.
 
Ran this stove flawlessly for 2 seasons in a bitter cold climate (lots of -30F's)
Our only source of heat in all small 700 sq ft house.

I mostly run the stove in manual peak winter, but use auto in fall and spring.

Last spring the stove started failing auto fire once in awhile, until it quit altogether so we continued with manual which worked great.
I pulled the igniter out this summer, and was surprised to see the insulation of the igniter wires mostly non existent. Basically bare wired.
The fuse had not blown, and upon inspection of the control board saw no (noticable) damage.

Bought a new igniter from an american manufacturer...15 fin. 310w made with 800 high grade stainless steel. Installed with no problems.

Turned the stove on this fall, and it did light automatically, but seemed to take longer than normal, perhaps 8 minutes or so.
Worked fine for a few days, then failed to auto start.

1 month later and I'm still fighting with the stove, it fails 99% of the time so I'm back to using manual when needed.

- Did an ohm test on new ignitor, read right around 50 ( tested my old ignitor and it actually read 48)
- Put a voltage tester on ignitor wiring from behind the stove, and it was 119v - 123v over 10 minutes of trying to auto start.
- Had already done complete cleaning...chimney sweep and clean out from both ends, pulled stove out and cleaned both chimney and rear exhaust of stove.
- Pulled exhaust probe and cleaned, reading on probe diagnostics when trying to auto start seem fine. Temp starts at right around room temp, and slowly rises as ignitor heats up.
- pulled ignitor and tested out of stove, using the stoves wiring and it glows red at about the 1:45 mark.
- burn pot was disassembled, cleaned above and below, all holes open, metal deflector is installed properly over ignitor
- Trap door under igniter is closed and screwed tight during start-up
- burn plate had warped after the first season, but still ignited, but pulled and straightened this fall.
- intake flapper was stuck in an open position, and now fixed and working.
- exhaust fan checked and cleaned and running between 2800 and 3008 rpm at start-up.
- checked all gaskets, hopper gasket seems fine, but I did find though if I held a lighter around stove door with exhaust fan on, that the flame gets sucked into areas of the hinge side.
- Removed old gasket, and cleaned very well, installed new gasket ...did not stretch it, let it cure for 12 hours with same results...seems to be a small leak on hinge side.
- Tried to adjust door on the handle side, and with every small adjustment, could not lose the leak.
- checked for cracks, holes, defects in casting around hinge side, cant find any problems.
-Tried different pellets, as well as some pine shaving in the burn pot..still failed. It seems to me the stove is over-feeding upon start-up, and this unit has no dip switches to control that, so I tested different pellets, and pine shaving in burn pot, with hopper lid open so pellets wouldn't bury or push out my test samples, with no luck, would get hot, but no ignition. Tried again by emptying hopper, so I could test with hopper door closed, same results.

SO...I know door is leaking, not sure if its my only problem. Stove definitly will begin to over feed after first ignition failure. Tried using duct tape in various positions where the gasket meets the stove and just using exhaust fan to see if I could stop the leak, or pinpoint it, but could not get leak to stop.

Anyone have any ideas what I may be overlooking? Stove started last night 3 times on auto, and failed again this morning.
The small leak bothers me, but I dont think it explains the over feeding. I also neglected using a surge protector on this stove and we have had many power outages and or brown outs, which did take out my Flat screen tv. I'm wondering if my control board is partly responsible with the bad igniter wires, and the possible brown outs while plugged in.

Any advice is very welcome !
Stove is working now, thanks for the help....turns out it was indeed the warped burner plate (which I had straightened out) My dealer wanted $275.00 for the updated plate, but I found another dealer that warrantied it for me...alls well now!
 
  • Like
Reactions: Mt Bob
Stove is working now, thanks for the help....turns out it was indeed the warped burner plate (which I had straightened out) My dealer wanted $275.00 for the updated plate, but I found another dealer that warrantied it for me...alls well now!

Awesome! Good for you for going to another dealer! I love my Absolute63 and expect years of good service!

Stay warm!
Mal
 
  • Like
Reactions: Mt Bob
Stove is working now, thanks for the help....turns out it was indeed the warped burner plate (which I had straightened out) My dealer wanted $275.00 for the updated plate, but I found another dealer that warrantied it for me...alls well now!

The burn pot on the absolute 43 has been totally redesigned due to this known problem...the updated plate will warp as well but from the back of the plate

Just a heads up