Thought it was the PHH but that turned out to be fine. Replaced the pesky part since most of the fluid was already drained on my driveway.
PHH took about 2 hours between cold ones and mucho forearm skin but the EHCV (Easy heater control valve) took about 15 minutes.
Because it's so easy to replace and spot trouble when the yellow creep reached the valve body, you guys might want to take.a.look at your HCV for the dreaded yellow creep.