David Shellum

I have a 2011 ram with 6.7 I replacedon't the t stat with a 180 my temp gauge hardly goes over 140 my heater hasn't been very warm for a couple yrs that's why I changed tstat what else cold be the problem I had a rad flush 2 yrs ago that's when I started haveing heat issues truck would heat up but it took forever now this winter it isn't getting temp up

6.7L MegaCab

Maybe air in the system?

Busboy

If you live somewhere cold I believe it should be a 195 thermostat, also a winter front helps lots.