A/C Not Working

Chris Bryant wrote:
Did you check the breakers on the generator itself?

Bingo. You have 2 breakers on the genset. One is dedicated to the rear AC. Also, MOST Load Shed systems kill power to the complete AC unit, not just the compressor. The Compressor kill is on a minority of units and usually in units over 200k in cost. Doug

does Your RV have a 30 amp shore cord, but a generator large enough for both A/C units,?

Check aka manually RESET BOTH circuit breakers on the generator
One breaker is tripped

It is common on RVs with 30 amp service and a genset large enough , to have the second a/C on a breaker, all by it's lonesome, on the generator

If you have a 30 amp unit, Winnebago often has a switch that must be turned to "Generator" when on the gen. Mine is to the left of the switch panel and breakers. Maybe the switch is still in the shore power position.

It switches the rear AC to the 20 amp output on the generator.

Today I checked and reset the breakers on the generator and all the breakers in the breaker panel.

The A/C unit still does not run; no fan or compressor. I even turned off the front unit to see if the rear unit would then come on. No luck.

I have a 50 amp cord but I am not plugged in. I am on Generator power.

I guess next I will get up on the roof with the multi meter and see if there is power going to the unit, if so I will then check the capacitors.

If there is no power at the unit then I will back track and check the power management system

Any additional advise????

So today I took the my multi meter and the trouble shooting instructions and checked the t-stat in all it choices of function ( fan only, fan and compressor, fan low and compressor, etc) and had the needed 12 volts in all settings. I then went to the control box in the return air duct in the ceiling under the a/c unit and had 12 volts there.

What I did find is there is no 115 volt power to the a/c unit even though the power control system shows power to both a/c units.

I guess I will now back track to the power control system to see if there is an issue there that is causing it to deny power to the rear a/c unit.

All breakers from the generator to the breaker panel have been reset the power control system seems like the next logical place to look.

Anyone know if there is any type of reset or fuse in the power control unit?

Any help would be greatly appreciated.

Both A/C units work fine on shore power both separately and while running together. I am 99% certain that in the past both would work on generator power.

I will continue to dig deeper

Did you pull up wiring diagrams from the Winnebago site and pour over them? You might have had a wire-nut splice come loose somewhere. Winnie's diagrams will show every junction point. You can start looking for them and popping covers off to inspect the connections within.

Always the chance of a bad breaker, given the breaker is in the generator power feature, given the info you've provided so far. If your generator's like some I've seen, it has two outputs. One pretty much runs the coach as 30A and the second largely handles the second A/C...

2011 Winnebago Sightseer, correct? Please post the Model Number within that group that represents your coach. Maybe one of us will pull up a wiring diagram and look for possibilities.