Checked elements all pull 8.6 amps. Put water in kettle and ran. kettle did have good vacuum on it when cold. Unit wont heat past # 7 . Tried adjusting . Temp. control is flaky . Recommended replacing temp. control and thermistor. Gave prices, customer okay to order. 4/21/17 Installed temp control and thermistor. Unit heats a bit then shuts off. Hi limit trips out. Changed hi limit. Unit has a rolling boil @ #7. Unit in use.