So I'm finally finishing this. Cap on an heater on and it still at 100 degrees. If I turn off the heater it continues to go higher. How much higher I'm not sure. What can the problem be? Before I even started this DIY I never had a problem with temperature. Now that I want to flush it. I'm having a problem. What's going on? I put a new thermostat too. Text me please someone 408.564.1950