Electrical Problem. Please advise.

2oldman - Your correct, the thermostat only uses 12vdc. I have started checking voltage at the control box and it appears that I do not have 120vac coming out of it. I need to check the circuit board further. As I said I was concerned that the inverter grounding, or hot and neutral might have caused an inter connection via the chassis ground or something. I have also heard about a "floating neutral" in some inverters but do not quite understand the theory.

sjturbo wrote:
2oldman - . The air conditioner is on its own 20A circuit. The circuit I used was a separate 15A outlet circuit that I can plug in TV/Satt..

Thanks.

As described, your setup should have no effect on your fan problem. I'm not aware of any thermostats that use 120vac.. but I've been known to not know everything! That said, if your control IS in that inverted circuit, then anything goes.

Sorry not enough data!
2oldman - . The air conditioner is on its own 20A circuit. The circuit I used was a separate 15A outlet circuit that I can plug in TV/Satt.
MandalayParr - The first thing I did was to put all wiring back to original, (inverter wiring not in the circuit). Fan does not work in high or low. Compressor comes on when thermostat is moved to cool.
westend - AC is on its own 20A circuit.
SeaDog/BRR - I believe the T-stat or Control box circuit is likely the problem. I just wanted to make certain that the inverter hook-up would not cause a problem in the AC control box.
The purpose of hooking up the inverter direct to the circuit is that we boondock often. When boondocking the inverter powers the outlets previously connected to the circuit breaker. When using shore power the inverter is still connected to the batteries and the batteries are being charged by the "converter". Hope this clarifies.

2oldman wrote:

sjturbo wrote:
removing the hot, neutral and ground from a circuit breaker on the circuit breaker panel and tying it directly to the hot, neutral, and ground on the extension cord,

Which circuit?

Mandalay Parr wrote:
why would you remove a 120 volt line to run an inverter that creates 120 volts.

I assume the output of the inverter goes to that circuit.

Maybe so. Little confusing.

Jerry Parr

sjturbo wrote:
removing the hot, neutral and ground from a circuit breaker on the circuit breaker panel and tying it directly to the hot, neutral, and ground on the extension cord,

Which circuit?

Mandalay Parr wrote:
why would you remove a 120 volt line to run an inverter that creates 120 volts.

I assume the output of the inverter goes to that circuit.

Two things here. 1. trying to run an AC on a 12g a extension cord will more then likely cause low voltage high amperage condition and burn something up. (personal experience with extension cord and AC unit) 2. The high low function of the fan is normally controlled thru the wall stat and or the control board on the unit and is not a function of external power. If the AC comes on and runs as it should then I would look at the control board or stat

You're attempting to run the AC through a 12 ga extension cord using an inverter? How big is your inverter and how many batteries do you have, this is usually a failed exercise because of the current needed to run an AC. The extension cord will also be causing a lot of voltage drop, depending on length.

Probably not related. Put it back like it was and try again.
Does the fan work at all...either hi or lo?

On second thought, why would you remove a 120 volt line to run an inverter that creates 120 volts. Something is not right. An inverter converts 12volts DC into 120 Volts AC..

Maybe the fan does not like to run on the inverter signal.