I just installed a small compressor for my Aux tank. I have a regulator to turn it on and off, things run fine until the regulator turns off the compressor then the fuse blows. Frist I blow 2 15 amp fuses, stepped up to a 20 amp and it blow. I am reluctant to go higher. What size fuse are others using? Any idea about why I am blowing fuses when the it shut off?