0
I bought a set of Woodcraft dual-temp tire warmers for the 2010 season and the rear ended up having an issue during the last set of TTD I did up at NHMS.
Not sure what happened, but even though the light came on, it didn't heat up. Most likely a break in the heating element somewhere.
Anyway, I sent the warmer to Woodcraft for warranty repair last Friday, 10/29 and had a replacement on Tuesday, 11/2. That's only ONE business day to receive and ship one back to me.
Kudos to them.