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Old 09-05-2011, 11:37 AM   #1
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Electrical and A/C issue

I have a 2005 Coachmen Cross Country. Everything runs fine while on generator, when the rear A/C is turned on or comes back on with the thermostat the tv goes off and I have to push the power button to turn back on.
Any ideas?
thanks, Tony
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Old 09-05-2011, 11:46 AM   #2
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Sounds like the TV is sensitive to the voltage drop that happens when the A/C comes on-line. If you have a good digital voltmeter (one with min/max hold is best) you can check how low the voltage goes. Shouldn't go below 108 volts.

You can also try plugging the TV into another outlet to see if that stops the problem.
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Old 09-05-2011, 11:48 AM   #3
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What is the voltage out of the generator? If it is low it causes a high current draw, thus tripping the breaker.
Does everything work on shore power?
Sorry missed the button being power, see bluepill above.
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Old 09-06-2011, 09:17 PM   #4
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I tried it while plugged into the house and it did the same thing.
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Old 09-07-2011, 05:34 AM   #5
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Rear AC is pulling a lot of juice on startup... could be a number of reasons, including too much head pressure (AC needs service...) Need more info..
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Old 09-07-2011, 06:43 AM   #6
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Are you using a 20 amp connection to the house?
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Old 09-12-2011, 06:48 AM   #7
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Are the roof units serviceable? I have heard that there is not much you can do with them. Yes it was plugged into a 20amp at the house, with the generator running I watched the voltage on one of the circuits in the MH panel drop to about 104volts when the A/C comes on.
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Old 09-12-2011, 07:50 AM   #8
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104 is low. Dometic units are for 120, they tell you 115 for operation, and 10% off means they can run at 108 with out many issues.
Now your tv sees the same thing and drops out.
What is your voltage from the generator with the ac off?
How long of a extension cord are you using and what is the voltage off of that?
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Old 09-12-2011, 10:44 AM   #9
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Knowing the voltages would be nice...could be build up in the gen or a connection loose causing higher resistance and thus more power draw.

As for the AC, best thing you can do at the moment is get up there, pull the shrouds, and clean the coils.. I like using a water hose followed by compressed air. See if that helps...
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