About the only way to positively identify the problem, other than a visual inspection reveals a short to ground, is to get a box of 2 1/2 amp fuses and rig up a fused test lead.
You can do one at a time, or make up one for each component, but what you do is connect the fuse inline to each output from the board.
If there is a relay or the gas valve drawing too much current, it will blow that fuse. If those remain, and the board fuse still blows, then you can assume the board it bad.
It's a lot of trouble, but beats expensive guess work and possibly multiplying problems!
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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