What AWG extension cord do I use with a 120v 60Hz 1500W AC portable heater

Kindly change the thermostat! Or the heating element.

any 10 amp cord will do the job as that is the limit of the power outlet
you can use a 15 amp cord if you can get to fit in the grommet in the case

There are universal power supply units available that come with a variety of interchangeable ends and switchable polarity, current and voltages. However, if one of these will fit your particular needs I have no idea or indeed if they are available in your country. Try eBay or Amazon. I hope that is of some help.

If you live in the USA or another country that uses 120V municipal power, then the AC uses about 800W and you SHOULD be able to run it (including starting the AC, which takes a lot more power than keeping it running once it's started) with about a 1500W to 2000W generator.

most of those electric fireplaces have a band of paper with holes in it that rotates around a light bulb this gives the illusion that the fire is flickering the motors that rotate that band of paper go out all the time its just a little electric motor you might be able to get one from the manufacture

good day.

first,the power socket,,try to see the power plug of your machine and the power socket you have..compare it..when its compatible no need to replace,,if not you need a socket adapter.or if not available buy a new plug (if your plug is not compatible to the socket)

secondly,you don't need a transformer if your ac supply in Australia is 120v..
if the supply in your place bigger than 120v...like 220v,230 or 250v..you have to use a step-down transformer with input of what you have in Australia and the output is 120v..and of course pay attention for the wattage of transformer to avoid over heat or burn..I suggest to buy 1500w...

thank you and good luck

I looked up regular electral diagram for the different elements.

You can buy a new one by clicking on the hyperlink:
buy replacement ac adapter power charger cord for INITIAL IDM-7110 IDM7110