Instruct: Classify a given review into positive or negative sentiment.
Query: What if you get a defective Heater ?

It's not a bad little heater but I had a problem with the front knob falling off.I bought it from "heaterusa", through Amazon.com.I have yet to receive any help from anyone, warranty or not.Amazon.com could not help, the company? "heaterusa" seems totally non-existant.I tried e-mailing them through Amazon, I tried to access them through the internet directly, I could not find a web site.I assume Amazon.com checked them out before bringing them onboard.I called the 800 number on the heater, I did get a recording that gave an international no., Tiwan ? It didn't work either.So...there's my two cents worth on this product.Dave Hamilton