Heating question?

Guys I am having some issues with getting heat inside the car. Last winter it was not working very well, but would warm the car up. Then over the summer the engine temp was running higher than normal, so we pulled the t-stat and it was stuck. So we replaced it, temp stayed the same. Come to find out the fan clutch was bad so replaced it and that solved the temp issue on the gauge. Then just before Mustang Week the water pump started leaking so replaced it. No T-stat, due to it being swapped not long before.

Now trying to use the heat, there is hardly any at all. It feels like it is trying to get warm as I acell. Felt the heater core hoses and they are not real hot? First thought from our tech was how about a t-stat. I told him it was just replaced by "you" in the summer. He said well maybe there is a blockage in the block somewhere or in the heater pipes?? He said that is a guess. The coolant has and still does look very clean. Since we knew the T/s was replaced we are trying to run a coolant flush with our flush machine to see what it does. It is actually hooked up as I type.

I started thinking though. I looked at the part # of the T/S we installed and it is a hi-flow 180. Could this T/S be causing the engine to run to cool and not give off any heat? What is the O.E T/S. When I feel the hoses at the heater core they feel the same. If it had a blockage wouldn't one be hot and the other cold? Another guy at Ford said that he had a similar issue on a different car and he swapped the heater core hoses to make it flow the other way and it worked???

Any help here folks.

not the knob, thought about that. It moves very easily to the cold and the temp switches with it. I wish it would be something simple like that.

This is weird I can't see my post in the forums? But obviously you could.. hmm

Nope just went and looked again and the knob is fine. It's all the way over to heat.

goin to try that tomorrow