Ashful
Minister of Fire
She's a beaut! Does it have a top-load door, or is the non-cat hardware in the way? I'd be interested to see the right side, back, and inside, if you have the time.
Several of us feel the way you do, and so I discussed this with Mark at Jotul, a tech who has been the company since they were still producing the Firelight 12. He agreed that it is one of the best stoves they ever made, but said that the reason for discontinuing actually had nothing to do with the design of the stove, and everything to do with getting the average consumer to run a catalytic stove without problems. Apparently, their number of service calls due to improper use or maintenance was much higher on this stove, than on any of their non-catalytic stoves. Also, there is an incorrect public perception that catalytic stoves are somehow troublesome or inferior to non-catalytic stoves, which I guess they found easier to join than fight. These were the reasons he gave me for Jotul getting out of the catalytic stove business.
Contrast that to those here, most of whom will admit that catalytic technology does build the superior heater, but the folks here at hearth.com are the exception. It's difficult to get the average consumer to even read the instruction manual.
Wow... 20 years! Better late than never.
The rear burn plate (the small piece with the seashell pattern cast on it) is roughly $65, and can be had at your local Jotul dealer, or from (broken link removed). Yep... time to pull your cat, and see what's left of it! Burning with the cat, you'll enjoy a clean chimney, and 12 hour burn times from that stove. I'm not sure how hot you were burning it before, but I typically have it cruising with the stovetop between 350F - 450F. It can also cruise a long time at 550F - 600F stovetop, but then expect burn times to be perhaps halved (I've not tried running this hot for more than a few hours, myself).
These old 12's can be a little tricky to get the cat lit off, and so it's very likely that's why you're seeing disappointing performance, with your first attempt. Really, you need a catalytic probe thermometer to know what's going on, as well as a simple stove-top thermometer. It's taken me two years to (just recently) get a system down to where I'm happy with getting fairly consistent light-offs. You can read about it in the following thread, post 21 being where I finally joined the enlightened: https://www.hearth.com/talk/threads/achieving-lift-off-in-the-downdraft-cat.116507/
Dry wood is a huge factor, and something I'm still struggling with. I'm burning mixed hardwoods (mostly Walnut and Ash), split and stacked last Thanksgiving, so 1 year seasoned. That's much better than where I was last year, but the wood is still not dry enough to get easy and fast light-offs. Most recommend 2 - 3 years, split and stacked.
Wow... 20 years! Better late than never.
The rear burn plate (the small piece with the seashell pattern cast on it) is roughly $65, and can be had at your local Jotul dealer, or from (broken link removed). Yep... time to pull your cat, and see what's left of it! Burning with the cat, you'll enjoy a clean chimney, and 12 hour burn times from that stove. I'm not sure how hot you were burning it before, but I typically have it cruising with the stovetop between 350F - 450F. It can also cruise a long time at 550F - 600F stovetop, but then expect burn times to be perhaps halved (I've not tried running this hot for more than a few hours, myself).
These old 12's can be a little tricky to get the cat lit off, and so it's very likely that's why you're seeing disappointing performance, with your first attempt. Really, you need a catalytic probe thermometer to know what's going on, as well as a simple stove-top thermometer. It's taken me two years to (just recently) get a system down to where I'm happy with getting fairly consistent light-offs. You can read about it in the following thread, post 21 being where I finally joined the enlightened: https://www.hearth.com/talk/threads/achieving-lift-off-in-the-downdraft-cat.116507/
Dry wood is a huge factor, and something I'm still struggling with. I'm burning mixed hardwoods (mostly Walnut and Ash), split and stacked last Thanksgiving, so 1 year seasoned. That's much better than where I was last year, but the wood is still not dry enough to get easy and fast light-offs. Most recommend 2 - 3 years, split and stacked.
Hi Maggie,
Glad to hear you're using the cat. If it's still functional, it should vastly improve your burn times, and keep your chimney clean.
Those who talk about visually seeing the cat light off most often have stoves where the cat is mounted at the top of the firebox, and can be seen thru the top of the glass doors. There are even a few (Vermont Castings 2-in-1, for example), where the cat is in the back, but the glow can still be seen thru the front doors. Unfortunately, as you already noted, ours is hidden behind the firebox, completely out of view. There is a probe hole in the back of the Firelight 12, usually plugged with a small screw. If you remove this screw, you can insert a catalytic probe thermometer thru the hole, and monitor your cat temps this way, which is how I have mine rigged. I use an electronic probe, so I can set the meter on the floor next to the stove and read it easily, rather than crawling behind the stove to read a mechanical thermometer.
As far as stove-top temps prior to light-off, I find that mine usually light off when I get the stove top to 550F, before closing the bypass damper. The wood I'm burning came down in Hurricane Sandy, and was split and stacked Thanksgiving 2012, so it's only 1 year seasoned. Because of this, the cat temp usually only goes up to 550 - 650F when I close the bypass damper, and the cat temps will fall below ignition if I start to close down the air control with it in this state. So, I actually continue to burn with air 1/2 or full open for a good 15 minutes after closing the bypass damper, until my catalytic probe temperatures reach 1000+. Once the cat takes off like that, then I find I can close air 100%, and the catalytic probe thermometer stays in the 1200 - 1500F region for many hours. This means I can slowly smoulder a load of wood all day, with stove top temps around 350F, but with the cat above 1000F my chimney stays clean and I waste little heat.
Coming around to your back-puffing, I find this happens under a few conditions:
1. Weak draft. I have two Firelight 12's, and the one on 15 feet of chimney will backpuff any time I shut the air control to 0%. I must keep it open about 5% to 10% at all times. Th stove with 27 feet of chimney never back puffs at outside temps below 50F.
2. Getting a load going too vigorously, and cutting back the air too quickly. That burning mass of wood has momentum, and if you cut off the air with it going strong, it's quickly gobbling up the oxygen quicker than make-up air can provide it. Flame stalls, but stove is super-heated. As soon as enough air leaks back in thru your closed air control to provide the adequate amount of oxygen for ignition, boom... backpuff. Cut the air back by half each time (full, 1/2, 1/4, 1/8, closed), and you should avoid backpuffing on a stove with adequate chimney.
3. Closing the air control before the cat is lit off. Basically, shutting down before the cat is lit off seems to cause draft stall, whether it's just from a too-cool chimney or a plugged cat. Weak draft, like item 1 above, means the stove is not drawing make-up air in thru the draft control quickly enough.
What surprises me is that you're able to burn this stove with the bypass open. I find my chimney temps really go high, if I leave the bypass open on a full load, even with air control shut all the way.
That is a rip roaring flame! I have replaced 2 back plates since 1998. I think I get into trouble with the back plate is when I open the ash pan door to push more air through at start up...and sometimes I forget to close it early enough. I prop replaced 3 cats, orig lasted several years but then fried it with not so dry wood (wet) actually. I did experimate with the Cleanskies? - looks like a brillow pad, seems to work well. all said, I very much like and enjoy the stove.View attachment 136504 does any one know if you can season the back plate prior to burning in oven maybe helping it season might last a little longer ive bought 3 of these and they cost 117.00 shipped now not cheap . they warp and crack if over heated very easy . I just ordered all new internal parts and new inner back plate , chamber and also the outer cast cover that im referring to . my stove is a 1995 and ive had it all this time burning green wood and all it was time for a overhaul . 1,097.00 in parts the chamber is $435 alone then $ 200 for a steel cat these prices are costly but I still don't want a new stove this is like a old friend now to me
I wasn't giving advice, but thanks for the clarity.Using the ash pan to start the stove violates the warranty and risks cracking the base or grate. The manual explicitly says don't do this. This is a costly repair and unnecessary.
View attachment 136506 View attachment 136507
Jotul spec's 1/4" braided gasket for everything but the door glass, which is 3/16" braided gasket. Note that's braided, not woven.
The way you're ripping thru rear burn plates, and seeing your lower grate, you're really overfiring that stove. My 1993 stove had a small, almost invisible hairline crack in the back plate in 2011. I replaced it and have put at least 10 cords thru it since, with the rear burn plate still looking like the day it was installed. All of my grates are still as flat as the day they were made, and I'm putting a LOT of wood thru these stoves. There is no reason to have this damage, if you are using the stove properly.
One issue with this stove is that it can really take off in bypass mode. I find it only takes maybe 8 minutes with a full load of fresh fuel on coals in the morning, for the stovetop to reach 500F. In fact, sometimes I see external stove pipe temps hit 600F within 4 - 5 minutes, so I'm dialing back the air before I even engage the cat. The back plate damage is from burning with air open too far, or staying in bypass too long.
I've never seen a stove grate warped that badly, on a stove that's still functional. Have you checked all the seams between castings?
Hi - I'm wondering where you bought the steel cat cs 552. The lowest price I've seen is $199 without shipping. Also, could you tell me more about the 04-128455 cat cover. I'm having trouble reading the parts diagram and wonder if that's the soft foam-ish thing at the bottom of the inner back plate.Yes , i know ive been using it for 19 years amazingly no cracks anywhere went through with fine tooth comb vacumed it out then all is good cept these parts i ordered
1 . 04-128454 chamber $435,70
2. 04-128455 cat cover $71.00
3. 04-128456 bottom $ 62.00
4. 103329 grate $64.00
5.103329 inner back plate $138 .19
6. back plate cover $117 53 shipped
7. acess bolt $ 2.44
8. codar steel cat cs552 $ 112.99 shipped
9. shipping cost on other items noted $30.00
10. gasket material not purchased as of yet
So a total of about 1,100 .00 after 19 years of hard service Not bad !
I know what your saying about running it way to hot this is true . I intend on using it more to the standard normal use knowing all this now .
So what is the temp you dont want to exceed ? if i put a magnet therm on lower stove pipe near the stove so i wont burn to hot ? i understand now that i was not suposed to have ash door open for so long or used for air drafting . What temp should the damper be closed at too ? To start the use of cat ?
and is woven much different than braided for use ??
thanks for suggestions im looking for locations for new gaskets as the old basicly fell off leaving not much of a trace i did read a thread showing pics of peoples gasket jobs but some looked like the gasketed double like , on the back of stove and then on back of inner back plate as well seems double to me ? as in post # 29 betrice i cant tell what he is gasketing the back of plate when thers already a gasket in his first photo thats there, that would appear to be doble gaskets https://www.hearth.com/talk/threads...-chamber-from-jotul-firelight-12.99769/page-2
I'll post part numbers and prices tonight, but I bought all of these components once thru a local Jotul dealer, and then the cover and lower piece for the second stove from woodmanspartsplus.com. The cover is about $65, as is the lower filler piece. They're both made of a soft refractory insulation material.
If your talking of the bolt to the rear plate that covers the cat...your giving me memories... Mine too was stuck. Tried using a propane blow torch but ended up shearing the head off. I took the rear back plate out and then took it down to my local auto mechanic who got the threaded bolt out (relatively easy),Thanks! I found the rear plate at Stove World for $119.85 at StoveWorld.com. I'm including a picture of the catalytic converter. I know I ran the burner without the bypass for 20 years and only this winter started using the bypass. To me, the cat looks good - no cracks & feels solid. Wondering whether you think it needs replacing.
View attachment 136600
View attachment 136601
Other things I found that were wrong, and I'm wondering whether it is urgent to replace these, or if can wait until next year.
- Crack on the inner burn plate(103329) View attachment 136602
- Catalyst chamber cover (04-128455) is cracked, but not broken
Lastly, how do you recommend I get the screw that holds the rear plate out? It's stuck pretty solid.
- Catalyst chamber bottom (04-128456) is broken in half but could feasibly be put back in place.
- View attachment 136603
Again, many thanks, Maggie
Already soaking. Have to visit my favorite neighbor for the impact wrench. Think I'll need it to take my mower blades off, too!Soak with favorite penetrating oil, then remove with your favorite impact driver. Don't try to muscle it, lest you break it. That's the beauty of impact wrenches.
(broken link removed)interested in knowing whether there are any recommendations on breaking in the new parts to add to their longevity.
Hi all...new here and was looking to hear what ya'll think about the Jotul Firelight Model 12 wood stoves. My parents bought a house that has a big 3 car detached garage that they have no use for so me and my fiance are turning it into a 3 bedroom house for us and our 5 yr old and baby thats on the way and due febuary. It will be 2 floor and about 1900 sq ft once completed (about 3 months from now...starting construction tomorrow) We plan on heating primarily with a wood stove and my parents house came with this white Jotul thats in great shape and they have offered for us to have it because my mother wants a black colored stove instead of white. I personally dont prefer white either but hey its FREE haha! Figured I could always get around to painting it black later down the road. I have grown up around wood stoves but have no prior experience with a Jotul. Was hoping someone on here could fill me in on opinions of this stove and maybe known problems or advice on keeping it in good operating condition. Thanks for any insight anyone might have!
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Hi all...new here and was looking to hear what ya'll think about the Jotul Firelight Model 12 wood stoves. My parents bought a house that has a big 3 car detached garage that they have no use for so me and my fiance are turning it into a 3 bedroom house for us and our 5 yr old and baby thats on the way and due febuary. It will be 2 floor and about 1900 sq ft once completed (about 3 months from now...starting construction tomorrow) We plan on heating primarily with a wood stove and my parents house came with this white Jotul thats in great shape and they have offered for us to have it because my mother wants a black colored stove instead of white. I personally dont prefer white either but hey its FREE haha! Figured I could always get around to painting it black later down the road. I have grown up around wood stoves but have no prior experience with a Jotul. Was hoping someone on here could fill me in on opinions of this stove and maybe known problems or advice on keeping it in good operating condition. Thanks for any insight anyone might have!
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