Hey All, I have been using this Drolet Tundra combination furnace for the past 5 winters with no issues. Today I was cleaning out the smoke tubes preparing for winter and noticed some corrosion on the rear pipe that leads to the chimney. I’m sure it is out of warranty at this point. What are your thoughts? From what I understand this pipe would have air blowing around it from the fan/jacket. Any advice or suggestions would be appreciated! Thank you! -Pat
![[Hearth.com] Drolet Tundra with corrosion](https://www.hearth.com/talk/attachments/img_2999-webp.350471/ "[Hearth.com] Drolet Tundra with corrosion")
![[Hearth.com] Drolet Tundra with corrosion](https://www.hearth.com/talk/attachments/img_3004-webp.350472/ "[Hearth.com] Drolet Tundra with corrosion")
![[Hearth.com] Drolet Tundra with corrosion](https://www.hearth.com/talk/attachments/img_3008-webp.350473/ "[Hearth.com] Drolet Tundra with corrosion")
![[Hearth.com] Drolet Tundra with corrosion](https://www.hearth.com/talk/attachments/img_3006-webp.350474/ "[Hearth.com] Drolet Tundra with corrosion")
Drolet Tundra with corrosion
- Thread starter Pwilli1989
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- corrosion fire safety rusted
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There is a lifetime warranty on the firebox components I think. Call Drolet. The furnace is unsafe to burn as it is.
Not going to lie, I believe this is common. There was a repair in stainless I saw from the company at one point. The OG Caddy I had to repair which I cut off and did stainless and insulated it. It seemed the flue to the heat exchanger where the cool air hit would deteriorate the metal from condensation. If they kept the design, they would be smart to bolt a stainless heat exchanger in the furnace.
The Tundra I had at my sister's place did that...I cut a piece of stainless stove pipe to fit around that area, and clamped it on with 2 large stainless hose clamps...I coated the rusty/corroded area of the HX pipe heavily with furnace cement before putting the band clamp on... probably better than new...you could also use a stainless steel exhaust band clamp for semi trucks (6") too...but it'll cost more, and might be harder to install?
SBI warrantied out the furnace for the whole cracking issue though, so she's been rocking a Heat Commander for a few years now...which both the cracking and rust/corrosion issues have been fixed on.
I think I posted pics of the repair on here somewhere at the time...edit, here I found it...not a great pic though...didn't get one while I had the top off, so went back for this one later.
![[Hearth.com] Drolet Tundra with corrosion](https://www.hearth.com/talk/attachments/1794542059731-webp.350478/ "[Hearth.com] Drolet Tundra with corrosion")
SBI warrantied out the furnace for the whole cracking issue though, so she's been rocking a Heat Commander for a few years now...which both the cracking and rust/corrosion issues have been fixed on.
I think I posted pics of the repair on here somewhere at the time...edit, here I found it...not a great pic though...didn't get one while I had the top off, so went back for this one later.
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