Intermountain has always been very, very good about replacing parts. Even when it is the customer's fault. Two examples.
I got out some F3's to run and noticed the shells were splitting up the nose and rear. Pried them off the chassis to see it nearly crumble in my hand. Pulled out all the rest and saw this in two other engines. Sent Intermountain an email and had three new chassis in less than a week and an apology.
This next one is amazing. I got an early first run AC-12, pulled the tender shell and saw an eight pin connector for a decoder. Great, I thought, easy conversion to DCC. The Tsunami would overheat with the tender shell on so I finally solved that. The remaining problem was that the sound volume was very low, so I thought I would remove the daughter board and run straight to the engine. All the factory wiring was black so i asked for info on which wire went where, they sent me that with a comment that no one had ever asked that before. Bottom line was I finally gave up because I was unable to improve the sound. Cut all the wires which left the engine in two parts, loco and tender. Put it back in the box and assumed it was only good for parts, it sat there for over a year.
Finally I contacted Intermountain and told them what I had done (in more detail than I wrote here), I asked if I could send it in and would they fix it for me, told them I would be willing to pay because it was completely my fault. They told me a couple weeks later that the engine was a basket case and not worth repairing. A week later I got a box in the mail from Intermountain, in it was a brand new AC-12. The invoice said "PAID, NO CHARGE". They sent me a new engine free to replace the one I had destroyed. You can't beat that customer service.
Marty