When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
My '03 Z-06 heater is not putting out any heat; but I can get warm air in the defroster position. What could be the problem? Since I live in Florida, I hardly ever use the heater, but it was 36 degrees in SW Florida this a.m.!
Would you happen to have a 160 T-stat and a tune?
If so, your tuner very well may have the fans coming very early to keep the car cool and it's not allowing any real heat to build up.
I know my tuner asked me if I drove in the winter and said that he was setting the fans to come on at a certain temp to allow me to have heat in the car. If I didn't drive it in the winter he was going to set them cooler.