So it looks like I burned out the ceramic heating element on my e3d hot-end extruder. Going from the color code of the wire I have a 25watt heating element installed. Measuring the voltage at the wire terminals at the rapps board I get 12vdc which is correct. This should heat the hot-end nozzle to at lease 220C but I can't get past 160C and repetier then generates an error. I have not eliminated the thermistor as the possible problem. I went into the Marlin and re-set the thermistor to another value just to see if it would have and effect. It did so I went from a 100k value to a 10k value and repetier read the extruder temperature as being higher than it was. So the thermistor could still be the problem so I ordered a new one.