Ok I have been having a problem with no heat from my heater. Today I changed thermostat and tested the matrix by taking both pipes off and blowing water through it. Water flowed fine through the matrix so it has to be something to do with the controls inside the dash.
How do and where do I look inside the dash to see what's not working?
Is the heater control an electric switch that controls something inside dash or does it have a cable attached to it that turns and opens something inside?