I don't have any heat. Thermostat is working heater core is clear. Any ideas.....

 

Yep, I know exactly what it is.

The auxiliary coolant pump which pumps hot coolant into the core. It contains brushes which wear down. Luckily this is a CHEAP fix, as in a few dollars and some time!

What you need to do is order some graphite brushes from amazon and file/sand them down to the correct size--you will see that size when you open the coolant pump. You just solder the wires from the brushes onto the circuit and it's good to go! There's a guide here that I can't find as I'm on my phone. Do a forum search for 'auxiliary coolant pump.' It is such an easy fix with immediate results. Good luck.

 

Sometimes when the brushes wear out it takes the fuse out also.

 

It is a post by Suede.