2a fuse blows when switched to a/c

[Sandylaneguy]

The fuse in the thermostat blows when switched to air conditioning. The heat and fan only modes work as they should. Does anyone have a suggestion on where to look for the problem first? The trailer itself is brand new. I have a service appt setup but cant get in until june but i have a trip planned and would like to have ac available if needed. Thanks

[deebarjay]

shore power or generator ? I would guess generator without enough wattage.

[Sandylaneguy]

This happens when plugged into a 30 amp supply at the campground.

[deebarjay]

does it happen instantly or after awhile ? I have had c/b trip using 30 amp shore power at c.g. using micro and or coffeepot at the same time...really surprised me...the ac must draw a lot of power.

[Sandylaneguy]

It happens immediatly when switched to ac. Nothing else is in use, maybe a few lights or the tv.

[saltyman]

Two amp fuse in a DC control circuit sounds small to me, are you sure 2 amp is correct?

[Broadway Joe]

Open the air conditioning cover inside where the filter is and look for the control wire or remove the thermostat and check behind where the control wire is attached. Look for a pinched or shorted wire.