The on/off switch on the dash control makes nothing happen. The gr indicater light does not come on. I've checked the pressure, the daul pressure switch the fuses and the relays and to the best I could get at them the wires on the switch and control unit. I haven't checked the evaporator sensor because I can not find it. I checked the switch and don't have the continuity it says I should but I am not sure that is correct because it has diodes and they check good. If I take the #4 blue wire from the switch and ground it everything works properly except after about 5 min the warning light comes on and it shuts down. I want to replace the switch to test it but can only find it special order from Honda and can not return it if that is not it. Any ideas? Help. Bob