Boomerweps wrote:
My only concern with using the electric heater and AirCon together is the amperage draw if both kick on at the same time. That can easily exceed your 30amp system.
This isn't a big concern on 30 amp, or even 20 amp service.
My 90 pint Frigidaire uses around 300 watts with the compressor running. When I use the space heater method, I set the heater to low, and the usage is about 600 watts.
If you were overloading your 30 amp running A/C and a compressor D/H, maybe there was something wrong with one or both units. Also could be a supply issue, maybe low shore power voltage?