Heater Blowing Cold Air
While I was visiting North Florida last week, the heater on my 2008 Armada started blowing cold air. The controls work fine, the AC works fine, but the heater will not get warm. I looked in other forums, and it looked like the problem is more than likely the heater (water) control valve (HCV). I took it to a mechanic, he turned the heater on high, put a meter on the electrical leads that go into the HCV, and advised it was not getting power. He then looked at a schematic and told me the power comes from the climate control unit and it (the CCU) should be replaced. The CCU is very expensive and it seems like I would be having a lot of problems if that was the case. Has anyone had a similar issue or can you advise if this is a good way to test the HCV. Thanks.