Recently, while hunting, a spring broke on the generator I was using to run my camp trailer. (1982 Great Plains 20' tongue pull with Hydroflame FA-7220D furnace) This caused an increase in voltage output. I smelled a burnt wire smell in the trailer. All of the light bulbs burned out and the furnace would not work. Not even a click from the old style thermostat dial. I did some research that led me to check the igniter board. It had a big black burn right in the middle of the circuitry. I ordered the UIB L Post from Dinosaur on my smart phone at hunting camp. Simple. Two days later I was back in business. The wiring was plug n play. I did have to enlarge the post hole on the old board's plastic cover with a 1/2" drill bit.