Question about Dometic Rooftop RV Air Conditioner
My have a dometic roof top ac unit model 59516.537 it blew the main fuse twice and now it wont come on I checked the 3 amp fuse it was blown and every time I touch the new one to the fuse block it blows instantly Any help?????
The 3 amp is 12 Volt protection for the control board. If that fuse is blowing instantly, then you have a short in the 12 Volt system somewhere. More than likely it is somewhere between the Thermostat and the control unit. Check to see if you have 12V at the thermostat. If so, then disconnect the red wire from the thermostat and the red wire at the control unit. At the control unit side, use an Ohmmeter to see if you have continuity with ground. If so, that wire is the culprit. If not, reconnect the red wire and continue to the next wire. Do this until you find the wire that is shorted to ground. Of course, the ground wire will not be checked.
Hope this helps,
Posted on Jul 04, 2009
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Posted on Jan 02, 2017
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