It wont start. the hi temp and heavy button are the only buttons that come on

OK I am not an expert but I have spent the last two weeks learning about and fixing my dishwasher! Hopefully I can save you a headache. Try the following:

* Flip the switch off and on in your breaker/circuit box. May reset your washer.
* If that doesn't work, try running diagnostic/reset cycles by pressing heated dry -normal- heated dry or heated dry-sanitize-heated dry in sequence. If the cycles run fine, you will rule out a power, latch, motor/drying issue. It also may (hopefully) reset your system.
* If normal function still does not resume, make sure your power (from the breaker box) is turned off and unscrew (with a star-shaped screwdriver bit - check your car emergency kit/toolbox, you may find you have it) and open the front button control panel and check all connections. Try carefully unplugging and replugging wires and look for any corrosion/moisture on the circuit board.
* If that does not work, test the circuit board by unplugging the green ribbon cable from the control panel, reassembling with the ribbon cable unplugged, flipping your circuit back on and then closing the dishwasher door. If the drain motor runs, it will show you that there is still some function with the circuit board. Although it doesn't rule out the circuit board completely, it will point to a most likely control (button) panel issue and try replacing that. If the drain test does NOT run, it may be the circuit board that needs to be replaced.

Hopefully some of that helps!