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Old 03-31-2012, 05:33 AM   #1
Junior Member
Join Date: Mar 2012
Posts: 12
Why does one roof ac shut off when I turn on the engine key?

Hi everyone-
I recently bought a 99 Gulf Stream 34' SunSport with cummins ISB. Thx to your help I discovered my generator was capable of running both roof ac units at the same time. I believe the gen is a generac 6600 lp genset. It has 2-30amp breakers. Both roof ac's run simultaneous (after about a 1-2 min delay at startup.) on gen power with the coach engine off and ignition key in off position. But when i turn the ignition key to the on position (or start up the diesel engine), the front roof ac stops working completely. It does not re-cycle back on until i turn the ignition key off. Does this seem right? The rear ac keeps working at all times, no worries there! Any ideas? I need to be able to run both roof ac's while driving down the road...

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Old 03-31-2012, 08:08 AM   #2
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Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 4,547
It sounds like a relay is shutting off the 12 volt to the front AC. Call Gulfstream and check with them. Our dealership was a Gulfstream dealership and this is not normal.
1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
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