I agree. Check the DC fuses in the converter. Should be a whole row of DC fuses.
On mine I have two buttons
On/Off Button (Always push in)
Auto--Check--Gas button ( I always push in)
When working properly on Shore power the Auto Light should come on and the fridge will very slowly get cold. Allow 2-4 hours before you check for coldness. Remember it does not have a compressor. I normally turn mine on a day before loading the fridge.
When you go to disconnect shore power, switch over to gas is automatic(button pushed in) If all is well the auto Light will stay on and the check light will remain out after 5 minutes or so. If the Check light comes on something is wrong. Turn off and back on. Repeat until the check light is out.
Initially, the only way you know the fridge is working is the Auto light is on and the check light is off because of the very slow startup.
My on/Off lights have never worked. Just keep that switch pushed in.
Tom and Betty
1997 F250 PSD/AutoTranny
DIY Exaust Brake w/TC lockup
AutoMeter Tranny/EGT Gage
Translife Tranny Cooler
Superchips Towsafe
16K Draw-tite Slider
2000 Montana 2850RK