Bought a house with new carpets but that oh too familiar urine smell

[David Cohen]

Fannie Mae obviously tried to hide the fact that this house was infested by something domesticated or foreign. Normally, I'd tear it all out and recarpet or finish the hardwoods underneath.  But it's new carpet, so I hate wasting the carpet.  

I'm assuming the urine is in the padding.  Do I just need to replace the padding?  Someone told me to steam clean with amonia, anyone know anything about that? The smell has to go!