I use PF 130 1+1 on Kentmere Bromide G3, hypo-clear, wash, tone in selenium 1+9 for 5 to 8 minutes and never got anything close to a warm tone. It's always cold. Temperature has been pretty high lately (30C with high humidity) and even then, it didn't change anything. My pf 130 is dark like coke, and it still gives the same results as when it's fresh.
Have you contacted Kentmere? Maybe you got a defective batch?