Have a Nordyne Electric Furnace that the fan and heat runs constantly. I disconnected Gwire and it kept running. Changed out the relay and it keeps running. It has a 150 ohms resister that doesn't ohm out.

Where can I find a 150 Ohms resister? Please help

If your just looking for a resistor then any electronic supply house or possibly radio shack would have one.

Radio Shack but you also need to know wattage. There are many types of resistors, there is no "generic " 150 ohm resistor.